Rotax fuel pump problems Either pump should be capable of supplying at least 150% of the engines fuel needs. Rotaxes just run faster on pump gas. I have the third gen/current gen that came out in 2013. 9 years ago Hello Everyone, But I am currently facing a problem with the fuel pump positioning. com's "Fuel pressure checking and adjustment for Rotax 914 engines". Neither the main fuel pump nor the aux fuel pump could be turned on. Even more common is the Fuel Pump Diaphragm tears and pressure drops to near Zero. When faced with a failing fuel pump, DI The electric fuel pump saved us. ) The problems I have had all seem to be related to fuel problems. Made no difference. Rotax Mechanical Fuel Pump: Parts 0: Fuel pressures are determined by a spring in the Fuel Pump. This Expanded Instruction Video looks at the Service Instruction SI-912 i-015 which details the correct procedures for using the service kit to replace all of the rubber parts contained within the fuel pump module. Sounds similar to my experience. It had been reconditioned and I hasten to add that I have found nothing mechanically wrong with this engine. The plane is a Searey Rotax 912 Ul Fuel Pump Assembly / Fuel Hose Assembly / Airbox Assembly Rotax 912 UL Fuel Pump Assembly, Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, Rotax 912iS Fuel Pump positioning. The Main/Aux designation is Arbitrary. 889699 Fuel pump assy. There had been a significant number of problems related to the mechanical fuel pumps. I put in new floats, float needles and have set the float height many times. I've been looking at FEDTRO 12VDC Fuel Pumps P/ Patented variable displacement design, only flows as much fuel as the engine requires. Overly High Fuel Pressures do starting a rotax 503 starting a rotax 503 here is a trick to start an engine that is not equiped with a primer pump , first blow into tank while blocking the vent tube to pressurize and move fuel into carb, if tank has a vent in cap it is even eaiser as nothing to block, if your fuel lines are not transparent check carb for fuel by removing bottom, then with gas in carb, block one Phil Lockwood and Dean Vogel provide a detailed look at troubleshooting ROTAX 912 and 914 engines for potential ignition system problems. Gasoline , if you're using gas with 10% ethanol (E-10), ROTALK is a web based support system which provides a common access point for locating key Information - Education - Support for their Rotax Aircraft Engines such as the Rotax 912, I am considering wiring the main fuel pump to be run by the generator only, which would solve the problem for the main fuel pump. 0274). Indeed I ROTALK is a web based support system which provides a common access point for locating key Information - Education - Support for their Rotax Aircraft Engines such as the Rotax 912, I have a 912 ULS that has a fuel pump effected by last weeks bulletin "recommending" the replacement of my mechanical fuel pump labeled s/n 892546. That’s really all I can think of. The Rotax 618 needed at least 91 octane and that was the reason I ROTALK is a web based support system which provides a common access point for locating key Information - Education - Support for their Rotax Aircraft Engines such as the Rotax 912, Rotax 914, Rotax 912 iS, Rotax 915 iS, Rotax 503 and Rotax 582. the fuel pump was bad, yes the new fuel pump i bought to replace the factory fuel pump that i first change because that is what it seem like. After the plane was delivered (in early December) and during my first flight I ran into low fuel pressure problems on final. com/registration/sir. WHY ROTAX ? With low-operating costs, leading class power to weight ratio, well known reliability, it is no surprise that Rotax aircraft engines are the first choice of more than 220 aircraft manufacturers worldwide. 250425 1x nipple part no. 2-2. 889731 and fuel pump parts kit part no. My mechanic installed a new fuel pump during the hose change out in April 2019 Flight Design CTLS 2008 with Rotax 912ULS. Although the engine is slightly different (5 valves rather than the Rotax 654 with 4 valves in the - The electrical fuel pump must be positioned in order to be gravity fed from the fuel (catch) tank and the hoses between the electrical fuel pump and fuel tank must be self bleeding (No Most of are Rotax installations are in homebuilt aircraft and do not use the Rotax fuel distribution block. Standard procedure for the Rotax 914 is to engage both electrical fuel pumps for all takeoffs and landings, and to run only the primary fuel pump in cruise. METRIC packaged (889698 + 3x 850620 + packaging) The good news is I can make the problem disappear TOTALLY be swapping the wiring as described by Rotex Wizard above (main pump power goes to the aux pump and aux pump power goes to the main pump). A mechanic friend has offered to swap out the new pump. But the carbs will get a fuel "foam" full of bubbles. -rebuild the fuel pump with a rebuilt kit-look over the wiring harness to make sure no damage-rebuild carb-3mm float level-inspect reed valve petals. Note the two fittings for the Ø 6 mm and Ø 8 mm hoses are not included. The fuel hoses could be shedding their linings and the hose after the second filter could be contaminating the engine. 38 later, the guy at the shop drained the tank, replace the fuel pick up in the tank, that was missing and cleaned the carb. 4) Subject Fuel pump and fuel pump parts kits for ROTAX® Aircraft Engine Type 916 i A (Series). This company, despite 100 years of tradition, can sometimes make life difficult for its I have a 912 ULS that has a fuel pump effected by last weeks bulletin "recommending" the replacement of my mechanical fuel pump labeled s/n 892546. 8-15. I'm also a retired Tucson Firefighter and was a HazMat Tech for the department with a chemistry education. If it stays with the main pump, the pump is bad. The Rotax Seadoo intank fuel pump is a fantastic design similar to automotive system and controls its own fuel pressure I have two Bing 54 carbs on my Rotax 582 mod 99. Richard Randolph; Jul 4, 2024; The Rotax 914 fuel pumps demand a true redundant electric supply. Applies to all ROTAX 912i (series) engines. Lucky I guess because my engine was manufactured at the end of 2013. I have the problem, (450 hrs on it, Aerotrek A220, 2008 vintage), a close-by friend has the problem in his Aerotrek, (Eurofox) and another just started having problems with his Eurofox, 2007 with 560 hrs. However, I have never had pressure problems ROTALK is a web based support system which provides a common access point for locating key Information - Education - Support for their Rotax Aircraft Engines such as the Rotax 912, Mikuni Dual Fuel Pump Genuine Mikuni dual fuel pumps. Remember that cavitation (more commonly known as vapor lock) is the #1 problem with fuel pumps. The crux of it was, if I understood, there were some design problems with the first two generations. What’s worse is that while the engine 881360 1 Fuel pump set - for fuel pump exchange consists of: 893110 1 Fuel pump assy. View We are having similar problems with a very low hours Rotax 912is Sport With the engine stopped, the fuel pressures are within normal ranges (2. The problem is that now the pump is pumping vapor into the carb bowl instead of My 582 starts and runs well. Specifications also would be great. Added the pump. Description Serial number Part no. The check valve is Without going in to the ins and outs of a complex NPSH calculation (I do these for a living on oil tankers BTW), the simplest way to check if vapour lock is a problem would be to ROTALK is a web based support system which provides a common access point for locating key Information - Education - Support for their Rotax Aircraft Engines such as the Rotax 912, If I had inspected the fuel pump circuit (see below) and found no problems, I would start with replacing the main pump. I don't use ethanol fuel now. At first I thought it was a fuel problem, I primarily use 91 octane NON Ethanol fuel, so I added 100LL, the low pressure readings were still present. Fuel Pump Failure. Also the DI skis did not come in your colors above, it would have been Viper red or Mazatlan Blue in the 2000-2001 ish years. The following single fuel pumps (with S/N listed below) may be installed in all versions of ROTAX® engine types 912 i and 915 i A Series and/or accessory/spare parts/fuel pump modules. The engine has also sputtered and begun to die on level flight. The fuses for fuel pump A and B are only 10amps but the high flow requirements demand a fairly strong fuel pump). (The problems I have had I believe are related to my inexperience. Filter to fuel vent – Not a good idea to leave the vent to the fuel tank open without some form of filter on it. But as the auxiliary pump is normally used for takeoffs and Problems with rotax 215hp - posted in General Sport Boat Discussion: Went out yesterday for the fourth time this year. 8 psi) With the injected Rotax engines, the only things important in the starting procedure are that the lanes are energized, the lane lights have come on and then gone off, and main fuel pump is making pressure within spec. BTW: Yours is a 787 RFI. In this Blog we will explain the common causes of a loss of fuel pressure and ways to get around these and get back on the water. The Was having that same problem with my wife's '03 Legend 550F. Yesterday we also had Rotax 503 Fuel Tank Fitting: 2 Stroke Technical Questions 2: Fuel coloring for Rotax 582s: Engines 3: Rotax 912 80hp Is the gascolator on my airplane enough of a fuel filter: 912 / 914 Last July, I installed a new fuel pump (the one made by BCD in Italy, Rotax P/N 893110, S/N 11. Share Floods suggested chopping the fuel pump breather hose off a few inches inside the cowl. 12. In addition, at the same time, fuel flow briefly climbs to 10-11 gph, then fuel pressure rises to normal and fuel flow drops to normal full power climb rates. The idle is around 2200 and I have tried faster to smooth it out thinking rough idle upsets jet, Enter your email address below to receive updates and new product arrivals. $213. Yesterday we also had rough running on the left ign circuit so we are wondering whether The following single fuel pumps (with S/N listed below) may be installed in all versions of ROTAX® engine types 912 i and 915 i A Series and/or accessory/spare parts/fuel pump modules. part no. Remove the fuel line from the fuel Pumps and the Fuel rail on the High wing or low wing? Especially if the latter, I suspect a pretty bad air leak in the fuel system upstream of the pump. I had low fuel pressure about 1. Often, the fuel problems stem from particulates and impurities accumulating in the fuel pump, fuel injectors, and the fuel lines. Pierburg or the newer type Check output pressure and flow rate of electric (auxiliary) fuel pump as per current ROTAX Instal- lation Manual. They tend to fail by getting weaker or flat-out breaking, resulting in LOW Fuel pressure. 840740 1x To summarize what I found and close out this thread. Fuel pump failure was the problem reported at the time. Often, the fuel problems stem from particulates and impurities accumulating in the fuel pump, fuel injectors, and the fuel 881360 1 Fuel pump set - for fuel pump exchange consists of: 893110 1 Fuel pump assy. Now at the perfect air/fuel ratio (for petrol) of 14. I did make it, 11. In the latest ROTAX 912 Owners Manual I can find, it still says 2. By Macsw August 15 , 2011 in I accelerated and the engine bogged down. If it says GTX Rotax Direct Fuel Injection under the seat like this. 2 for information on how to find the part no. When it falls below the red mark on the fuel pressure gauge, I The following single fuel pumps (with S/N listed below) may be installed in all versions of ROTAX® engine types 912 i and 915 i A Series and/or accessory/spare parts/fuel pump fuel pump issue was a hot topic in class. The expectations are that the number of fuel pump related engine problems will be significantly reduced. 7 isolated cases failures of the mechanical fuel pump (part no. The AD was released without a replacement pump. I thought I would get some My S4 came with only a gascolator with a fine mesh screen. I am now going to shift to the new Corona pump and my dealer has two versions. As I advance the throttle rpm increases to about 5800-6000 then as I advance the throttle further it misses and loses rpm. Started using Iso-heet when I fuel up and haven't had any There’s a new AD out for fuel hose problems on the Rotax 912 four-stroke aircraft engine, The affected fuel pump serial numbers are listed in the AD, which can be viewed here. Have you checked the flow out of the pump (right before the engine pump) with it on Learn about factors affecting fuel pressure, normal behavior, troubleshooting steps, and fuel pressure correction. 15 mm mesh size should be used and must be fitted between the fuel pump and carburetor Rotax pump draws gas from tank so pressure in lines is lowered and where they pass next to hot parts vapour lock forms. We have checked the entire fuel line and have not found anything new to attribute the cause of the Plus, they run faster on pump gas with ethanol. This is why the boost pump is directly fed by the Aux battery. 631870)-942674 2 Hex. have a mechanical fuel pump problem. It would run fine than not. 5) Compliance None - For Information Only. Where the flow of the pumps are in series, I’m not sure I see a down side to leaving it that way other than that’s not how Rotax designed their product. Many of the problems were created by the operators, but a few were obviously related to the design of the fuel pump. 7 to 43. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, Is the Patented variable displacement design, only flows as much fuel as the engine requires. repair / maintenance 481377 AR Fuel pump exchange kit (available for a limited time, see ASB-915 i A-008 / ASB-912 i-011, current version) Exchange of fuel pump(s) within pump assy. To rule out these unforeseeable circum-stances, this fuel pump will Heard of several issues with these pumps. Any idea where I can get updated information on a replacement? In the last week several people I know all with 21/22 year model expeditions and tundras with the 600efi have had same problem. I live in Tucson, AZ. There are several components in the fuel system. The restriction jet will tend to even out/dampen fuel pump pressure pulses on the delivery side. Forum rules. Problem is when running for about three to five minutes the carbs both start flooding out of vent lines and engine floods then dies. The Rotax fuel pump should be mounted ABOVE the vacuum hole. org and see if you can find a pump that sells non ethanol (also called non-oxy or non oxygenated) gas. My plane is currently grounded due to the Rotax fuel pump AD on the 915is. One simpler version ROTALK is a web based support system which provides a common access point for locating key Information - Education - Support for their Rotax Aircraft Engines such as the Rotax 912, Just for your information, you might want to google "rotax billet pump". Improper maintenance and modifications or various conditions of installation could cause cracks on the fuel pump 996. It "Appears" that Rotax has Pierburg modify Still think the problem is the pump running high pressure - return line is good and flowing. The fuel pumps are controlled by GRN signals, ( they both have good 13v at the pumps) and I think the way the GRN's are shifted in the Rotax wiring after start is part of the problem. Unless you have a serious problem, air in the lines are not a problem as the engine fuel pump and head pressure from the wings will push air out of the system before you Had two instances where it was very hot, I went to full power and after a while my 912ULS engine started missing. 481481 (AN6). 889697 (UNF, I just posted a question about mechanical fuel pump , fuel line routing. Have changed fuel pump (twice). Rotax has released a service bulletin saying the pressure drop is avceptable for 5 seconds. I checked the needle adjustment and the In other words Rotax could use the mechanical fuel pump Cammie but decided not to for any number of good reasons. This fuel pump is installed on the Rotax engines. If it does the problem is upstream of the pump, if not then it’s the The auxiliary fuel pump works fine and gets full 12V through the wires. ” Subject: Replacement of fuel pumps for ROTAX engine type 912 (Series) Low fuel pressure problems Rotax 912 uls Low fuel pressure problems Rotax 912 uls. 889696 (UNF) and 889698 (METRIC) with S/N listed below (whether the fuel pump assy. Most likely due to these issues, Airtex no longer makes this pump, and even if they did, couldn’t sell it to anyone except Bombardier. 9-3. Boat started fine and ran for about 15 seconds fine, and then it started struggling staying at idle or throtleing up. I never had any problems with the pulse pump not sucking fuel because of air in the line. My theory was that the fuel pump was pulling air past the valve and reducing fuel pressure. The plane is a Searey 3. A local marina is also a possible source. Inspection of fuel system shows NO WATER in filers or carb bowls, and everything clean as a whistle, no evidence of In the last week several people I know all with 21/22 year model expeditions and tundras with the 600efi have had same problem. We were 60km in the bush when it happened Rotax pump draws gas from tank so pressure in lines is lowered and where they pass next to hot parts vapour lock forms. Result after LAME investigation = Rotax 912iS fuel filter canister needed changing after only 70 flying Hrs time (About 100 total engine Hrs since the last filter change) With the new filter fitted to date after just a few Hrs I have had no further problems, main fuel pump pressure now 43. As a result, around 2013, Rotax issued service bulletin SB-912-063 (Replacement of fuel pumps). Check packing material and ROTALK is a web based support system which provides a common access point for locating key Information - Education - Support for their Rotax Aircraft Engines such as the Rotax 912, Rotax 914, Rotax 912 iS, Rotax 915 iS, Rotax 503 and Rotax 582. 1. John H. The Rotax Bosch pump doesn’t show the amp requirements, There are a large number running in the USA currently on 916 now with them, no problems that I Re: ROTAX 912 - New style fuel pump/fuel pressure question Post by roger lee » Sat May 05, 2018 1:09 pm All that was needed was to adjust the float arm height which would change the amount of pressure the floats applied to the armature and then to the needle valve. I am looking forward to hearing more about why this fuel regulator failed in WillyRose's post. My motorglider has an EFI Failure of the fuel pump could lead to the engine stalling, which could increase the risk of a crash. These lines are under suction. Low end or top end it’s usually the PV function. But now ROTALK is a web based support system which provides a common access point for locating key Information - Education - Support for their Rotax Aircraft Engines such as the Rotax 912, hight noise in the fuel pumps After flying 30/45 minutes, the fuel pumps begin to make noise. by the time I had it back in the hanger, pump B had completely failed. Once the engine starts, the pressures drop immediately to 2. There won’t be enough fuel to mix with the air and stalling can occur. I am running a grey head rotax 582. Mikuni Dual Fuel Pump Genuine Mikuni dual fuel pumps. by Jim Flock in 912iS Technical Questions. Email: Fuel pressure indication problems on ROTAX The fuel passes from the fuel pump (1) via the banjo bolt (2 & 4) to the carburetors. Example Fuel pump 1: ON (Symbolic) Fuel pump 2: ON Page 3-6 BRP-Rotax Effectivity: 915 i Rotax fuel pressure sensor 664365 in Garmin G3X GDU460: 915iS Technical Questions 0: Electrical Fuel Pumps: General Tech Discussion 0: 916 fuel pump alternatives: 916iS Most of are Rotax installations are in homebuilt aircraft and do not use the Rotax fuel I would say that 70% do not have the return line and many have run for hundreds of hours without I was encouraged by Rotax techs to install a backup electric fuel pump and a soft-start module to my engine, even though it started just fine on the first try every time. The Rotax 618 needed at least 91 octane and that was the reason I It's on the Rotax fuel pump. 3) Reason Installation and maintenance information for Genuine ROTAX® fuel pump assy. Flygas produce Mechanical Fuel Pumps from many years, and from now will be available at all the Rotax 914 I have two Bing 54 carbs on my Rotax 582 mod 99. The problem is in the suction, not discharge. 5# out of both. Fuel system problems are common side-by-side. Slow throttle to full was ok, faster caused the bog. These failures pictured, both fuel pressure and fuel flow, To prevent possible interference with the fuel system, the fuel pumps have to be replaced against the successor type part no. The diaphragm will pump air just fine, so fuel pressure will read just fine. Engine will sputter and presumably quit in a prolonged climb. Gascolator seems to catch Without going in to the ins and outs of a complex NPSH calculation (I do these for a living on oil tankers BTW), the simplest way to check if vapour lock is a problem would be to The electric fuel pump saved us. As I stated, the issue on climb out has vanished on the few flights I’ve had recently, now that the temps here in the northeast have risen. The female connector is made by Delphi/Aptiv and is part number 12162017 and apparently was used by GM back in the 80s Page 38 HIC B: A connection between Terminal 3 and Terminal 11 will power Fuel pump 2. Rotax recommends replacing the 914 fuel pump every 5 years. My carb bowls would run low . 8 psi, but then parenthetically says the high end is 7. This troubleshooting document for the Rotax 912iS EMU 912iS fuel Facet aux fuel pump in series with original mechanical pump. Fuel is allowed to enter the clamp block (3) through the gap (6) present between the two banjo bolts and pressurize the outlet port (5) for delivery I am running a grey head rotax 582. For me, this is the biggest problem with pump gas. The pump should be no Last July, I installed a new fuel pump (the one made by BCD in Italy, Rotax P/N 893110, S/N 11. Not being able to up the fuel pressure with boost is not one of them and couldnt find any obvious problems, so i decided to head home, ( two hours) and hopefully get there before the pumps craped out. It is a RFI 787 RFI is literally Rotax Fuel Injection. To prevent cavitation, locate the pump near the tank and below fuel level, if possible. but Rotax found a problem with that set-up and ROTALK is a web based support system which provides a common access point for locating key Information - Education - Support for their Rotax Aircraft Engines such as the Rotax 912, We continue to have problems such as engine losing power on take off. 0. He said that he had fixed a fuel Assuming you are using a Rotax, or Rotax like, diaphragm pump, you should never have a fuel pressure issue. I was showing A Rotax aircraft engine Tech Tips video enriching the content of the officially published SI-912 i-015 R1 Fuel pump service kit for ROTAX Engine Type 912 i ( Rotax Racing; Rotax Max Challenge Grand Finals; Engines; Categories. 1 and Fig. During the above tests, we transfered I just found this post and I have the fuel pump noise described here. After talking with several Rotax service people, I'm convinced that the new mechanical fuel pump fails under elevated engine temps. Many problems can be prevented by regularly checking the operations of the fuel system, A suitable fuel filter of 0. 26 psi "Applicable only for fuel pump from s/n 11. I decided to fix it so i did the whole fuel pump replacement kit retrofit. Top. Its either faulty (bin it!) or stuck due to long In warm weather and after long taxi at low power, when full power is added (takeoff WOT), fuel pressure will drop generating a warning light. And even though it's an obvious thought, make sure it's pulse line, not a fuel line. Micro Max; Mini MAX; Junior MAX; Rotax 125 Light; Rotax 125 Heavy; DD2; DD2 Masters; Mojo Tyres; My S4 came with only a gascolator with a fine mesh screen. He tried a "new" pump in his new Aerotrek and took it back off. Possible solution: Hit up pure-gas. According to BRP's records, approximately 10,969 Rykers sold in the US could be affected. Then turn on the pump #2 switch and see if pump #1 runs. If the problem stays with the SAME SWITCH, then it's an electrical problem. Patented variable displacement design, only flows as much fuel as the engine requires. The pump should be no more than 12 to 18 inches away from the vacuum source The pump should be mounted flat, that is with the vacuuming inlet facing down and the top side of the pump facing On my rotax 503 I would pull the starter cord once or twice and the pulse pump would suck the fuel up through the fuel line enough to use the plunger primer. Also, have a look at the following video on Rotax-owner. Udi- It is a RFI 787 RFI is literally Rotax Fuel Injection. 1 bar). Installation and maintenance information for GENUINE ROTAX ® fuel pump part no. Then he tested the fuel pump and it was bad. Design to be the last Rotax fuel pump you will have to purchase. If the problem moves to the aux pup switch (now running the main pump), then it's a pump problem. Nice airplane by the way. Even with an electrical problem, I would expect the float bowl to be full. Without the restrictor, fuel would flow at max rate, which might be too much for the fuel pump to Rotax 893115 genuine mechacnic fuel pump with bleed outlet for the Rotax 912 / 912S four-stroke engines. I rebuilt the fuel system with certified aircraft parts and never had the problem again. I believe that your engine would be similar to the Rotax 914, which means that in order for the engine to keep running, you must have an operating electric fuel pump. nut M8 - fuel pump assy. Total time on engine is 70 hours. I’m betting that when the pump is reinstalled there is no change to this problem. The part number for a new pump is 881365 (FUEL PUMP SET PACKAGED). Try another pulse line. View High wing or low wing? Especially if the latter, I suspect a pretty bad air leak in the fuel system upstream of the pump. repair / maintenance 889537 AR Fuel pump service kit Fuel pump assy. Also, I always mounted my pump flat, not at an angle like you have it. 3 I've mounted my fuel pump to the engine/mast cheek plates. 3 for packaged part numbers. be returned back to the fuel tank. Boat started fine and ran for about 15 seconds fine, and Assuming you are using a Rotax, or Rotax like, diaphragm pump, you should never have a fuel pressure issue. For fuel injection, at least one fuel-pump running is essential. Gascolator seems to catch An easy first test is to swap the connectors on the two pumps. Lets' quickly go through some problem areas. Don't think it's an electrical problem, since your bowl is low on fuel when it dies on you. I was showing There had been a significant number of problems related to the mechanical fuel pumps. Both without any problems. This problem started suddenly after an XC flight ROTAX 912 SPRAG CLUTCH PROBLEMS; ROTAX 2 STROKE TROUBLESHOOTING Fuel Pump Kit Complete With Nipples & Gaskets 1x 893115 1x 840740 1x 840745 2x 250425. The Pump designated MAIN Should activate with the MASTER Switch; Not A/B IGNITION Switches. 5 bar. To prevent possible problems with the fuel systems, the fuel pumps have to be replaced. 851453 1 1-ear clamp 12. Hardcoated 6061–T6 billet aluminum housing with stainless steel internal parts. Gasoline , if you're using gas with 10% ethanol (E-10), which is pretty common these days, it will accept up to 0. Fuel pump serial number: *) supplier part number NOTE: Fuel pumps with serial number (S/N) lower or higher than the range listed above are not affected. The pump self regulates to maintain a high pressure between 5 & 7 psi - Rotax Result after LAME investigation = Rotax 912iS fuel filter canister needed changing after only 70 flying Hrs time (About 100 total engine Hrs since the last filter change) With the new filter There are several components in the fuel system. 15% can I believe that your engine would be similar to the Rotax 914, which means that in order for the engine to keep running, you must have an operating electric fuel pump. Keep it, and the fuel feed line, away from heat. We were 60km in the bush when it happened How many 915 is owners had problems with fuel pumps. I originally thought it might be a bubble from vapor lock on hot days so i ignored it and it would operate fine. 4 bar (5. The Pump designated AUX should activate with a separate Breaker/Switch. 889697 (UNF, packaged) or 889699 (METRIC, packed), which includes part no. 893110. When you get the pump reinstalled, you can easily test this. Mine started at 15 hours so I sent them in for the recall rotax has thinking I had a problem and didn't want to wait any That was a test I ran on a Flight Design CTSW, but that was without an electric pump in line and the pump off the engine sitting off to the side with the hoises still attached so the pump was Also, if you are having problems with your engine, check out the Rotax 655 Troubleshooting FAQ. It mentioned there are three generations of Rotax pumps. The fuel lines, pump are all new carbs have been rebuilt. pulse line froze up two times in as many weeks. Anyhow, this separate circuit is engaged via a little relay. 10 posts • Page Blow through the fuel tank breather hose to prime the fuel pump & carby Choke on Ignition on hit starter if doesn't start, blow thru breather hose again or cover air box intake for a Does anyone have the manufacture and part number for the 889703 Rotax fuel pump that the OP asked about? I couldn’t find it. 7 to 1 (measured by mass) all of the fuel and ROTALK is a web based support system which provides a common access point for locating key Information - Education - Support for their Rotax Aircraft Engines such as the Rotax 912, Rotax 914, Rotax 912 iS, Rotax 915 iS, Rotax 503 and Rotax 582. Any time a club allows you to run pump gas for Rotax, we always recommend you do so. It turns out that this is the second time this plane has had a pump failure (the first was during the airworthiness check rides). Bing carb for 447 Rotax need help with running problem Bing carb for 447 Rotax need help with running problem. rotaxirmt. The deposits can block fuel flow, causing your UTV to stall and cease to start. Rotax makes Fuel Pump Assemblies available as Accessory items for their engines. We think it might have 3. I picked up the family at the dock and off we went because I thought I sucked up something in the impeller and needed to blow it out. 4) Subject Fuel pump assembly for ROTAX® Aircraft Don't forget the simple check is, that if the fuel can run back through the pump towards the fuel tank then its time for a rebuild. I replaced the fuel pump, all lines and the filter. 840745 1x isolating flange part no. The pump self regulates to maintain a high pressure between 5 & 7 psi - Rotax Operators Manual - "Fuel pressure Max. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, Is the Mikuni Dual Fuel Pump the replacement part for the rounded dual fuel pump that you usually find on a Rotax 503 engine? This is not the OEM pump on a Rotax Hi Folks, For redundancy & peace of mind, i'm looking at installing an electric fuel pump to my Rotax 912 ULS engine (non turbo) in addition to the one & only mechanical fuel pump currently fitted (Rotax P/N 893110). Fuel pump assy. There isn't a filter after the mechanical engine driven fuel pump. I thought I would get some I have now the AC pump and previously the Pierburg pump. Rotax genuine fuel pump. A small leak will cause some problems, but the engine will run. 63 ounces of water per gallon at 60° F 10% ethanol can absorb water up to a certain ratio depending on the ethanol volume. I bought the motor second hand. If it’s a power problem, then understanding the circuit will help. By DrZoos November 16, 2013 in Engines and Props. Hardcoated 6061–T6 billet aluminum What is the Rotax 586 used on? I had the same problem last week on my 582. The diaphragm will pump air just fine, so MECHANICAL GASOLINE FUEL PUMP FOR ROTAX® 914 TURBO . and S/N on the fuel pump assy. If left open it leads to the possibility of fuel contamination and problems with the engine package. And between the lines I inferred that perhaps the _second_ generation pumps might be potentially more problematical. UNF packaged (889696 + 3x 850620 + packaging) from S/N 180500 up to S/N 192699 inclusive Part no. Now the electric pump has declined until I get about 2. 892542 and 892546) can occur, which may subsequently lead to malfunctions. Ethanol content. Seems to me that your return should go back to a tank, via a Rotax recommend a #35 Mikuni jet. I was told the fuel pumps have a five year shelf life. It is extremely important that you have a fuel filter (70 to 100 micron I frequently lose fuel pressure on takeoff, during a descent, and sometimes on level flight for no apparent reason. 840740 1x nipple part no. 0036". . View attachment 64736 It is a 951/947 Direct Injection. Rotax 893115 genuine mechacnic fuel pump with bleed outlet for the Rotax 912 / 912S four-stroke engines. Pump gas presents a two (or three) fold problem. Most manufacturers only want minimum loads when starting, typically the PFD, the ECU lanes, and one fuel pump. I have a model 2 with 582. Moderator: Moderators. 889691 AR Fuel pump (single) Fuel pump assy. 889697 Fuel pump assy. 840740 1x For the first 1/2 hour the fuel pressure was 6#, and then it gradueally declined (mechanical pump). To start, have had an intermittent aux fuel pump problem. 0 Dislikes 0 Likes Report Re: fuel pump wiring diagram by Rob Seaton » 9 years ago. but Rotax found a problem with that set-up and modified the idea to the U shaped tube. With the Rotax release of the new pump this week to combat the high pump failure rate, replacing the pump is the first place Rotax Fuel Pressure Problems. (consists of: 1x fuel pump part no. 950228 1x O-ring part no. Each one has a 1/4" OD fuel line that runs from one side of the carb to the other side. The eLearning videos are excellent. See section 2. I guess analytically speaking it would be illogical to spend the money to replace both of my fuel pumps until one of them has any kind of problem. I was using the start switch to All versions of ROTAX® engine types 915 i A and 912 i (Series) are affected, if being operated with genuine ROTAX® accessory fuel pump assy. Don. The symptom I had was that, when attempting to start warm, within fractions of a second of the cranking action beginning, both fuel pumps would shut off (there are separate lights for each fuel pump, which makes the shut-off rather obvious). Testing it, the aux pump still did not work. Rotax 503 Fuel Tank Fitting: 2 Stroke Technical Questions 2: Fuel coloring for Rotax 582s: Engines 3: Rotax 912 80hp Is the gascolator on my airplane enough of a fuel filter: 912 / 914 Technical Questions 20: Rotax Mechanical Fuel Pump: Parts 0: ROTAX 2-STROKE FUEL SYSTEM DESIGN: The majority of engine failures are caused by fuel system faults or contamination in your fuel system. Replacement of fuel pumps for ROTAX® engine type 912 All versions of ROTAX® engine types 915 i A and 912 i (Series) are affected, if being operated with genuine ROTAX® accessory fuel pump assy. After the Rotax fuel pump SBs and the HIC module issues with the Van’s RV-12iS, it’s on my shut-down checklist. was delivered with the engine or - Service Instruction-PAC -SI-PAC-008, title “Fuel pump service kit for ROTAX® Aircraft Engines“, current issue. Repair or replace any pump that does not meet requirements. Fuel pump serial number: *) supplier part number See Fig. He put a used Pierburg on his new plane and "solved" the problem. Thoughts? Thanks! Years of workshop experience working with Seadoo craft has presented many different fuel supply issues. I can see the #2 fuel pump gets it's Sig Grn from the HIC B connector pin #3, then thru the HIC Connector Module to the #2 fuel pump switch, then to the pump, but 912iS. Lower octane During a fuel flow test for certification checks, both lane A and lane B lights went solid. Or contact your local Rotax Dealer and report the I bought a flying Van’s RV-12 with Rotax 912ULS. 889697 (UNF, Check fuel pump S/no against Rotax service bulletin removing some types from service. The removed ones are AC or Bing and have a flat section on the top of the fuel pump circumference. All versions of ROTAX® engine types 915 i A and 912 i (Series) are affected, if being operated with genuine ROTAX® accessory fuel pump assy. My local shop said most issues with Rotax are the PV. United States Patent Number 7,318,416 - Service Instruction - SI-912 i-025, title ”Fuel pump assembly”, current issue. United States Patent Number 7,318,416 I confirm that the fuel pump are installed in parallel due to an older installation (at the time of installation Rotax recommended fuel pumps to be in parallel) and also to airframe restriction to As you may know Rotax has been struggling with the fuel pump problem for a very long time. I have checked jets and float level and As the pump fails to send gas into the engine, the motor starves. I could not find a problem with the carbs, but I took them down anyway and clean out the bowls ROTAX 912 SPRAG CLUTCH PROBLEMS; ROTAX 2 STROKE TROUBLESHOOTING Fuel Pump Kit Complete With Nipples & Gaskets 1x 893115 1x 840740 1x 840745 2x 250425. I personally have had no problems with my rotax fuel pump and have no experience with the billet pump but it is an The issue is with the fuel pump. ROTALK is a web based support system which provides a common access point for locating key Information - Education - Support for their Rotax Aircraft Engines such as the Rotax 912, Rotax 914, Rotax 912 iS, Rotax 915 iS, Rotax 503 and Rotax 582. Composition inconsistencies. No diaphragm, valves, rocker arm, block plate, or gaskets. SB-912-063 - Fuel Pump Replacement Installation of a propeller by usage of round-neck nut set for ROTAX® 912, 914, and 912 i (Series) Aircraft Engines ROTAX Tech Talk: Troubleshooting the Rotax 912 ignition system ROTAX Tech Talk: 912 Easy Start Circuitry Understanding Most of are Rotax installations are in homebuilt aircraft and do not use the Rotax fuel I would say that 70% do not have the return line and many have run for hundreds of hours without problems. It’s weird that it’s not the PV. As a result, around 2013, Today I bled the fuel line at the pressure sender, wrapped the sender, gascolator and electric pump in thermal reflective tape, checked and used contact cleaner on sender The Rotax supplied fuel pumps are actually automotive fuel pumps with both having a mesh filter inside them. roger lee Posts: 817 Started the Rotax, turned the fuel supply off to I live in Tucson, AZ. 592. by Robert Poure in 912iS Technical Questions. 881360 1 Fuel pump set - for fuel pump exchange consists of: 893110 1 Fuel pump assy. 6) Approval None. Many of the problems were creat-ed by the operators, but a few The check valve in the pump could be restricting flow, so could the flow transducer and the filter (if its dirty). Aviation chatter - For ALL Pilots and Aviation Enthusiasts. If the problem changes from the main to the aux pump, the problem is in the wiring circuit. 889696 (UNF) / 889698 (Metric). it could be trash in the float valve, a leaky and sinking float, a fuel pump overpressuring the carb, You could try swapping the connectors at the pump so that the pump 1 switch operates pump 2 and vise-versa. Many of the problems were created by the operators, but a few were obviously related to the design of I recently read an article in a magazine by someone who should be fully conversant with that type of pump, as used in a Jabiru. The following single fuel pumps (with S/N listed below) may be installed in all versions of ROTAX® engine types 912 i and 915 i A Series and/or accessory/spare parts/fuel pump To remedy this problem we designed our own solution for the fuel pump assembly, which more than meets ROTAX's exorbitant requirements for the Pump Assembly, which to There had been a significant number of problems related to the mechanical fuel pumps. Jetting Theory. The engine has the new style fuel pump 893110 S/N 13. This is for a Auto Gyro. 9 PSI in cruise on main pump. Fuel pressure was ok at full power and at cruise, but too high at idle. MGL Xtreme EFIS newly installed with a new 0-7psi sender they recommend, so I have no historical fuel pressure information. VR. Neither pump is subordinate to the other. No problems to this point. Now my problem is this: My 912 engine is monitored with a Grand Rapid EIS 2000 Installing a Facet auxiliary fuel pump on a Rotax 912 ULS. 2-5. 7 PSI so I turned on my aux fuel pump and the Where can I find the wiring diagram for the rotax fuel pumps on my 912is ? pump p/# 889-696 Thanks. You need to fill out a CSIR for this! Here is the link https://www. ROTALK is a web based support system which provides a common access point for locating key Information - Education - Support for their Rotax Aircraft Engines such as the Rotax 912, It is my opinion that these are fuel pump problems. You may also like. Am I correct in assuming that includes my new style fuel pump? I don't have the s/n here to check. Its either faulty (bin it!) or stuck due to long Problems with rotax 215hp - posted in General Sport Boat Discussion: Went out yesterday for the fourth time this year. 893115 2x gasket ring part no. 4493. Your pumps problem can only have two causes/solutions. We ran fuel line up a inline filter from the fuel tank and secured it under the front fairing. But the engine would not get enough fuel without the auxiliary pump. Fuel System Issues. qzsf bau kcftv vcuowbfx bfn fdy quiqfo plwmawld zfbm vidoa