Mercruiser electric fuel pump problems I put direct power to the electric fuel pump on the side of the motor near the motor mount and the boat will fire right up and run great. It has a standard mechanical fuel pump with a high-pressure pump in the fuel module. 8. I have a Weber 4 Bbl carburetor and it will bleed down if left for a few weeks without starting. The engine is a Mercruiser 5. Today my new fuel pump will be arriving and I will embark on the journey of replacing my old one. Mercruiser 140 1985 fuel pump problem? Thread starter JOEM2254; Start date Jul 31, 2017; J. While attempting to change it myself I apparently bent the rod that actuates the pump. 0 problems. No gas to the carb, no fuel in the bowl, Can anyone help with this issue. Jul 18, 2015 #22 G. Hard to start, but will repeat process. According to my serial number listed above and the mercury website; it is located on top of the fuel pump cap on the cool fuel module. 0 electric fuel pump,year 2001 11-22-2018, 04:05 PM. Low Gas Mileage. A few days later it did it again. mercruiser 5. The pump should be able to put out 60psi, so it needs to be tested. 7L and 6. You can either replace the fuel pump or opt for a rebuild kit instead. Thread starter Mcgiver; Start date Jul 9 Do It Yourself, Boating on a Budget - 260 Mercruiser electric fuel pump conversion - So I tried taking out my boat yesterday and had a hell of a time starting itfinally got her running. Cool fuel 2 fuel pump in making loud whine. Would not start, checked for problems. since you already jumped 30 and 87 and the pump runs. 0L 5. Dirty Fuel Filters: Description *** THIS IS A NON-THREADED HIGH PRESSURE FUEL PUMP FPF Electric fuel pump for Mercury Replaces: Mercruiser 861156A1 / 807949A1 / Sierra 18-35433For: Mercruiser V6 and V8 305/350/377/454/502 EFI. S. Check the motors manual but 4. 7l (2 bbl. 5 psi. Motor: Mercruiser 4. Peace! I have a 1990 7. Aug 17, 2007 #2 Re: 4. Lessons Learned! Regarding aftermarket parts, I always thought OEM parts were the safest and best bet. Motor has never given me any problems until this weekend. <br />All the special shutoff valve hoses, disconnect tools, and gauges are readily available at automotive stores, and are not Mercruiser only special tools, but they are tools needed to check the system out properly. 1 Mercruiser Problems. 7 EFI (TBI) Fuel pump or fuel regulator issues. 4 liter engines used in the mid-90's (I don't know the date range), Merc had a design where the sea water pump and the fuel pump were on the same belt driven shaft. 0 MPI fuel problems. There are some obvious reasons that lead to a Mercury outboard’s bad fuel pump. It ran fine for a couple months and then started flooding over after idling for a minute or two. We plan on doing so this week. Well this is all fine and dandy, but I have read that I should be replacing both the fuel pump (807949A1) and the cooler Pump solved the problem. So far so good. Replaced the water/fuel filter, no change. Updated on Mar 5, 2021. There is nothing in the ECM that removes the ground for the fuel pump. I reset it and it was up and running again. Hot wired electric fuel pump and it ran fine. JOEM2254 New member. Thread starter blibe1; Start date Jun 28, 2022; B. Fresh batteries. I purschased a fuel pressure gauge and connected it to the shrader valve on the fuel rail today and this are my notes: Ignition to on, fuelpump starts and builds the pressure up to 40 PSI, when the pump stopps the pressure drops instant to 38 PSI. If the orifice at the float inlet were 1/8th inch then 14 psi would exert 1/64th that pressure at the needle, or about . One will run for I really don't care for them and a lot of mechanics pull them off and replace them with a raw water pump and electric fuel pump. 5PSI. My fuel pump went out this past Friday. It ran great all season long until the end. It has this flooding issue. Mechanic suggested it was probably how to check or test a mechanical fuel pump if diaphragm is perforated diyFuel Pumphttps://amzn. If you keep the fuel under pressure it will not vapor lock. The following day the engine would not start again. Boat has two engines one runs perfect. kghost Silver Medal Contributor. The Best Electric Fuel Pumps (Review & Buying Guide) The Best Electric Fuel Pumps (Review & Buying Guide) By Hank O’Hop. 3 electrical problem; ignition fuse & fuel pump no this is the 10 amp 'ignition' fuse under the steering wheel, next to the fuses for the radio/nav lights/blower ect. I had the carb rebuilt and the same thing happens. 7/350 2bbl carb that i had rebuilt last season. Check the hose that runs from the fuel pump to the carburetor. 2006 7. 0 out of 5 stars Low pressure was high pressure Guys, I have the older 454s with Holley 4160 750 c. the 90 deg elbow just pulls out of the fuel cooler. I had a failed fuel pump on a 5. 3 efi restart problem Vapor lock. Take a look. 3. The electric fuel pump has no my 1990 searay and put 2 vortecs out of say a chevy tahoe,ill swap manifolds bellhousing and wiring looms i cant see a problem . The engine provides users with dependable power and performance, but like any engine, Re: Mercrusier 4. I would expect that the float valve was designed to handle that pressure. Is it true that the electric fuel pump does not work until there is Basic Mercruiser 4. com FREE DELIVERY possible on eligible purchases. 0 MPI is a widely popular marine engine found in the heart of countless boats worldwide. 0 MPI electric fuel pump the oil pressure switch does not directly control the power to the fuel pump/s. Electric fuel pump does not turn on nor does it have the 2-3 prime mode when key is Mercury MerCruiser Sterndrives & Engines . I have an electric fuel pump on a 4. 3LX it has an electric fuel pump. 22 pounds which is roughly 3 ounces. 7L V8 GM. 0 serial number Om626769 has me stumped. Re: Aftermarket fuel pump for Mercruiser 5. I had a friend with me and he told me to turn the ign switch to position one. Perhaps the vacuum hose got pulled off the regulator while it was being removed or installed. . The Mercruiser Sterndrive Forum . Yes you can crank away with the key all day long and get nothing. Motor will start and run 15 - 25 secondes and dies. Installing the new one is 7. Here are some insights into why poor fuel economy might occur and how to address it: 1. 3 engine can be both frustrating and costly. 2L V8 GMSmall End Non Threaded. Both these engines have 250 hours on them with no real problems, The new set up has an electric pump supplying directly to the fuel rails. Should I start looking at the carb or the electric fuel pump next? What is the best way of installing a (temporary) fuel pressure gauge on the fuel line? Last edited: Aug 16, 2007. 0-liter displacement and relatively compact size make it suitable for a wide range of Diagnosing a Fuel Pump Problem. , other than two exceptions: 1) the red/purple wire that is supposed to feed The Mercruiser spec for the electric fuel pump according to several sources that I found is 9-14 psi. (replace I installed a brand new Mercruiser big block fuel pump over the winter when I re-built the motor. Reviewed in the United States on July 23, 2016. Remove the fuel pickup tube it's the one where the fuel hose hooks to the tank a 90 degree angel fitting, it's a anti-siphon valve. Verified Purchase. Hooked up my pressure gauge, not even a whisp of pressure. When it bogged, it dropped all the way to 10 psi. Mercruiser fuel pump diagrams, The Fuel Pump is not getting power, causing the engine to just turn over but not fire. Found good spark, no fuel pressure. John The fuel pump not coming on is a sure sign that you don't have all circuits on line. enforcer30 Seaman Apprentice. Hello there, I have a 2001 5. Warranty Any electric fuel pumps returned to Mercury MerCruiser for warranty and found to function Buy Low Pressure Electric Fuel Pump for Mercury Mercruiser 4. 3 Carbureted Fuel System Questions Thanks for the help, guys. usually when I turn the ignition on, it will beep and the pump runs Anchor & Dock Anodes Covers & Tops Electrical Engine Fishing Fuel General Fuel pump not running - 2004 mercruiser 5. 3, 5. 7L carburated engines, 861155A3, 861156A1, 861156-1, 18-8868, E11004, 861156A1, 807949A1, 861156A03, There was a problem filtering reviews. Only did pump and not the whole system. We also Replace the Fuel Water Separator Filter. I purchased the boat recently and have enjoyed it so far, although it needs some minor repairs, as expected for a 16 year old cruiser. 0 out of 5 stars Solved my fuel problems-Mercruiser 5. Learn about Mercruiser 3. Got it out after sitting for a few months. Fits: Mercruiser 4. You need power to the ECU so that it can tell the fuel pump to turn on. I am also going to install a ball valve between the return of the pump and the fuel filter. The mercruiser mag mpi 350 has 2 pumps. 0LX Flooding Problem - New fuel pump pressure too high I have a 1997 Bayliner Capri. 3L MPI / Alpha 1 leg SN: 1A611503 I have been having an ongoing problem with electric fuel pump that makes a whirring/buzzing noise. 66 $ 46. Took the boat to an authorised Mercruiser repairer who charged like a MerCruiser electric fuel pumps are common on newer motors that feature fuel injection, and these too need to be changed out when fuel delivery issues arrise. Re: 1989 5. I. 5. I showed them pictures and they recommended a HP Elec Marine Fuel Pump by Carter. This needs to sense oil pressure or the fuel pump won't work. 66. [colour=navy]Electric Fuel Pump Troubleshooting Models Affected All MerCruiser V6 and V8 carburetor, EFI and MPI gas engines. 3L 5. Price, product page $46. Not the ground. 7L V6 V8 Carburetor Engines Low Pressure Fuel Pump Replaces 935432 18-8868 With Gasket: Electric Fuel Pumps - Amazon. We are back to square one and will need to trace back through all the fuel and electrical connections once more. How Do I Know if My Fuel Pump Diaphragm is Bad? If your outboard motor has a mechanical fuel pump. 0 MPI can have its fair share of problems. Experiencing poor fuel economy in your Mercruiser 4. So I added a check valve between the fuel separator and the pump. If it isn't making contact then the engine won't start or get fuel. 9 out of 5 stars. I set the I have been having an ongoing problem with electric fuel pump that makes a whirring/buzzing noise. Joined Aug 10, 2007 Messages 30. I did some research about this problem and most of the time it is due to the relay. Christopher Allen Rey. There are several challenges to this. 3 L Mercruiser not getting fuel I had a similar problem with my 4. 2EFI/MPI). 3. Jump to Latest INTENTS. The only way I can get the motor to start and run is to put 12v directly to fuel pump. The fuel turns into varnish and the pump fails. In this blog Top Is this normal? Or maybe I have an accelerator pump problem? Merc manual says the pump should have 7/16 inch stroke. Reactions: OldSchoolBoats. I also replaced the fuel pressure regulator inside the Cool Most modern vehicles use electric fuel pumps, but anyone who works on older models and classic cars must be familiar with mechanical fuel pumps. They are always a pain to deal with on the starboard engine. New one is 86115-A3. Situation Mercury MerCruiser receives electric fuel pumps returned for warranty that function Mercruiser 5. 7 L Merc. JC. • Faulty fuel pressure regulator (EFI or MPI models). The model you would want is E11004 (high pressure). I ran the pump for a while prior to hooking it up to the carb to make sure clean gas was coming through. The Fuel Pump is not getting power, causing the engine to just turn over but not fire. 0LX 305 V-8 230HP. The problem was a plugged up fuel pump. I do not know if the previous owner replaced the fuel pump and left this part off. Hi There my family and i was on vacation, and when we got back and wanted to go saling, our Mercruiser 454 mpi with electric fuel pump would not start. Designed and manufactured by Mercury Marine, this powerhouse engine boasts a proven track record of performance, reliability, and efficiency. 7 (carb) with electric fuel pump. If this happens often, it may be because of problems within the fuel pump. So, these are the symptoms that you may experience from a faulty fuel pump. When it comes to maintaining and troubleshooting your 4. Then you take the plastic cover off. Changed 90 amp fuse. 3 L engine has been a popular choice for boats and personal watercraft of various sizes and makes over the years. My mechanical fuel pump died. Take those nuts off and the cover. 7 Mag MPI Engine. thanks rick Mercruiser replaced a 1983 5. Add to cart. I was having a problem with fuel making its General Q & A - 502 mag fuel system - I have a 502 mag MPI with the Mercruiser cool fuel system and it has always had random vapor lock. Causes of a Fuel Pump Failure on a Mercury Outboard Engine. Many engines use an electric fuel pump and others use both an electric fuel pressure pump and a mechanical "lift" pump. There was no sound coming from the fuel pump (was not priming). Which is what we have covered for most of this article. 4 Bravo. However, like any engine, the Mercruiser 5. Tested electrical and all was good. com FREE DELIVERY possible on eligible purchases Install the hose on the fuel pump both ends and cut about five feet on the sucking side of the pump just look for the arrow on the pump. Bad fuel pumps are mainly caused by electrical disruptions and faults. Mercury MerCruiser service bulletin for troubleshooting electric fuel pump issues. OD736979. 0 Mercruiser MPI sterndrive Realized we didn't hear the fuel pump kicking on. You could also have a kinked fuel line, or an air leak on the fuel intake side. The numbers go from 1 to 6. blibe1 Cadet. Customer: I have a mercruiser 5. Is conversion to electric a better/safer idea than simply replacing my Buy Quicksilver 861155A3 Low Pressure Fuel Boost Pump: Electric Fuel Pumps - Amazon. 0 Mercruiser 305. I started by replacing the oil pressure switch and that did not fix it. 7L Mechanical fuel pump to Electric question I'd also recommend going with the one who brung ya, lol. The port engine started dying after running at idle for a few minutes. 0L. My 2003 Mercruiser Alpha 5. Mercruiser 7. Buy Low pressure electric fuel pump compatible with Mercruiser 4. to/32SHnsqAmazon link for Other possiblities are a faulty pump or bad electrical connections/ground to pump. Re: 2001 Mercruiser 4. Buy a genuine Mercury Quicksilver or aftermarket part. 2001 SeaRay, Sundancer 260, Mercruiser 5. You should change the impeller frequently, normally annually. I replaced the fuel pump on the starboard engine two years ago, no problem (that one just outright died, no fuses blown). I Re: Mercruiser Mag MPI Fuel Pressure Problem Injectors won't make the fuel pump pressure low, but you could have a problem with the pressure regulator. The fuel regulator you have there is different from mine. Reply. MerCruiser 5. 7 mercruiser with a 1997 5. Thanks, Joe in St Charles IL. Please reload the page. my fuel pump is not powering up when I turn the key to the run position and my alarm does not go off for low oil pressure. If it seems like you’re filling up your car more Re: fuel pump problem Here is the info from the Merc Service Bulletin 2004-01 Hope it helps and makes sense. This high pressure electric fuel pump is part of the Mercruiser cool fuel assembly box, consisting of a fuel cooler, fuel regulator and containing box. Undo the inlet fuel line, unplug the connector and its out. Try looking up Mercruiser "Cool Fuel". Also there is a oil pressure sensor on the motor underside. That said, I don't suggest buying the pump until you can find out if that is the issue. Also Airtex makes the mechanical and electric fuel pumps for Merc. Then out onto the River, get her on plane and she dies, just like ignition shut off. We haven't had time to trouble shoot the latest issues. 4L 8. The pump An Electric fuel pump (for carburetion) should produce the same pressure (5-7 psi) Whereas if we just simply throw a bunch of parts at a problem The Mercruiser 5. when that fuse blows all the gauges die down and there is no power to anything. I reset the Then there are special procedures in manual #36 for testing the fuel system, and isolating rather the problem is injectors, regulator, pump, or whatever. 7 4. The sea water pump part of this are typical. 4 carbureted engines. • The pump’s internal check valve may be stuck from fuel gum. Mercruiser experts could not even help me on this issue. • A defective fuel pressure regulator (EFI or MPI models). 4 mercruiser starting problems. Second, I traced all the connections in the schematic down to the terminals and found no problems with pinched wires, corrosion, loose connections, etc. (They make the Mercruiser pumps) Carb is flooding. Fuel Pump on 454 MPI Pump has a good ground, never had a problem when I jump it from the relay coil. 39. If you are going to let your boat sit for 6 months or more, you should run Fuel Stabilzer through the fuel system. It would idle rough and stop Fuel pump runs for 2-3 seconds and then shuts off. Low pressure, electric fuel pump 862264A7 is for specific MerCruiser stern drive engines (4. 3L MerCruiser possible fuel problems!!! Quick question, after the Hey everyone, I am having and issue with the electric fuel pump. I'm contemplating replacing the pumps with electric pumps, thinking this would eliminate the diaphragm failure/leak possibility. If there is gas inside the hose then you have a fuel pump problem. Concerning fuel pump – the Merc book shows a purple/yellow wire connected to the starter solenoid along with the yellow/red wire. Then the pump and cooler can come out of the housing. Re: 4. 1 Horizon 300hrs port engine Last year it became hard to start. 7 On many 7. FREE delivery Wed, Apr 30 . There will be two small nuts that hold the pump and fuel cooler into the housing. Covers models affected, problem description, troubleshooting steps and warranty information. But there is not much mention of what to do with the fuel pump. I am not sure if it is the fuel regulator but the design is so bad on my boat that you must pull the engine to check the fuel pump and fuel cooling system. Put steady power to the electric fuel pump see if Fuel Economy Concerns in Mercruiser 4. I have been having Fuel pressure issues for awhile now, ran some electrical tests and found that im getting electric to the fuel pump but it doesn't kick on unless smacked around, so the pump is being changed. Checked that two it was at 9-9. The Mercruiser 3. I put direct power to the electric fuel pump on the side of the motor near the motor mount You could have ignition switch problems, turn the key to the run position and see if you have power to the purple wire on the coil, the purple wire on the back of the alternator, Went to mechanic - electric fuel pump works during crank, but did not run when engine was running. • Check for a pinched or plugged hose going to fuel pressure I began with a low pressure / booster pump on the starboard side of the engine thinking that may be the issue and an easy fix, next I replaced both fuel pump relays. Main content About this item 5. Aug 14, 2011 #1 Mercruiser 5. At first, I was not really sure what the problem was. If the pump is an original Mercruiser Customer: JA Customer: . I found the 50 AMP main breaker had tripped. This 100% eliminated any other issues other than the fuel pump. A freind of mine took his voltmeter and tried it out on the pump, it only got aroung 8-9 volt and i tried to unscreew the not on top of the fuel pump, there did not come any fuel out when turning the key ignition on the panel. Carb floods when trying to start. Weird biut both old fuel pumps were labeled 86115-4. I'm not sure if many people had this problem or not, so I'm going to just give a little story here about an experience with a Mercruiser fuel pump. When MerCruiser uses an oil pressure switch for the fuel pump (on carb engines only) they use it to control the power. f. 0, 5. 0 throttle body. Its 3. 861155A3 Electric Fuel Pump For Mercury Mercruiser Marine Boat 4. I’ll have to check that tomorrow. 0 turns over but won't fire. 3L V6 Mercruiser 5. 7L V6 V8 Replaces Part# 861155A3 861155-2 18-8868 Low Pressure Fuel Pump. Attachments. That should give me around 60 pounds of fuel pressure if the pump is in good shape. If you see one of those symptoms, your fuel pump might be causing those problems. Replaced with new Airtek fuel pump. I have a 1993 Mercruiser 5. E. Crank the bow of the boat all the way up, and stick the hose I have a 2000 Reinell with 7. T Just serviced the fuel filter/water separator and now the fuel pump won’t run. 5 lbs would be about right. I replaced the fuel pump with a Quantum E11004 recommended by one poster on this forum. Re: No power to fuel pump on 1994 4. No reason to go with an electric pump unless you want a lot of hassle for no improvement in performance over a mechanical unit. It often indicates underlying engine issues that need attention. I was cleaning out the bilge under the engine yesterday and some water splashed up on the engine area. With this being said, and on the note In this video I am working on replacing an old mechanical diaphragm gasoline fuel pump with a Carter electric design. Buy JDMSPEED New Electric Fuel Pump 861155A3 Replacement For Mercury Mercruiser Marine Boat 4. i have a 1997 Sundancer with twin 7. If your fuel fuel pump is missing the ground, the problem is in the wiring harness. Hello from Finland! Need help with fuel pump problem. Skip to. 2006 340 8. 0 fuel pump basics, installation you wouldn’t want to unwittingly create more problems for yourself by neglecting to inspect or misdiagnosing issues with your current fuel A-Premium Electric Fuel Pump Module Assembly with Sending Unit Compatible with Jeep Cherokee 1997 1998 1999 I have a 1999 Powerquest 22ft with a mercruiser 454 MPI with a Braveo 1 drive. Took the boat to an authorised Mercruiser repairer who charged like a wounded bull to pull out the engine and replace the electric fuel pump. If there were to be a problem next to your water separating fuel filter is your low pressure boost pump that helps deliver fuel to the high pressure pump. The cool fuel pump was making a loud whining sound when purchased, but the boat started up fine, occasionally there was a hard start (I assume now that the pump was failing). No pressure in fuel rail. After that, i hooked everything up and cranked it. Test the fuel pump for proper pressure. Can you provide me with a picture of the shim so I can check mine. The fuel pumps on most modern vehicles are electric and mounted in the fuel tank. ) gm 350 v-8 1998-2001 fuel pump and fuel filter parts. Or fastest delivery Tomorrow, Apr 26 . You probably mercruiser carbed 5. to/3rj60Ibhttps://amzn. 3 LH I/O. Mercruiser 5. I put the rebuilt carb and new fuel pump on the engine using the existing electrical connections. Joined Jun 28, 2022 Messages 6. 3L V6 Mercruiser OK - first, I tried the jumper across the oil pressure switch with no change in results. Nothing I decided today to convert my old manual fuel pump to a new Edelbrock electric fuel pump. That should clear up the fuel pump cavitation, if that is what is going on. I re-built the carb 3 times, until I did a fuel pressure test and found the mechanical pump putting out 12 psi at idle!!! In this video we do a Fuel Pump Replacement on our Bayliner 285 Boat's Mercruiser 5. Jun 28, 2022 #1 Just some background, have a 2012 Bayliner with a 5. 3L, 5. So, here we have covered the main causes of it. It is possible the float level is so far off that the fuel bowl isn’t filling up. The motor is a 1999 mercruiser 5. I put on a Mr fuel co or some such brand fuel regulator. Unscrew it. If the ECM does not receive ignition reference pulses (engine cranking or running), it shuts OFF the fuel pump relay, causing the fuel pump to stop. I have a 2003 Sea Ray 5. 0. NOTE: Refer to MerCruiser Service Bulletins 1998-04, 1998-05, 1999-07, 1999-08 and 2001-04 for additional information concerning electric fuel pumps. could I have the key switch wired incorrectly? Does the purple wire and the black go on the same terminal it is a 4 position key switch. Last weekend we ran our cruiser for a couple hours in the Arm, at mid to high rpm, then idled along the shore for about an hour. I went way out of my way in When the bogging was about to occur, I noticed a noticable 5 psi tick down in pressure. it is 9psi. 7 MAG MPI. Get her restarted, then down to my cousin's The older model pump can still be found just search "mercruiser 861156A1". Whether you’re a seasoned boat owner or a newbie, understanding the electrical system of your engine is essential to ensure smooth operation and prevent potential failures. But I'm worried about getting this one out from under the port side engine. After many hours and different methods of trying, the rod is not coming out of the block. 4 mercruiser. Amateurs may be tempted to blame the fuel pump for problems with drivability and hard starting, but the pros know that the gasoline itself may be at fault. Mercruiser has a low pressure fuel pump that is installed in the beginning of the fuel system to keep it from turning to vapor. I think I got my pump on amazon or eBay for around 100-120. The pump kit includes the pump, mounting bracket, fuel filter; hose clamps, wire leads and extension to multi-pin connector and connecting accessories. 4 MPI I would bet steps 4 and 5 on page 5E-79 locates your problem. 3L that I built to '95 spec. The fuel pumps are Carter Universal 5. The original fuel system, mechanical pump, VST, We put in a pop off valve from mercruiser and it's run like a top since then. 0 engine, produced by Mercury Marine, is a popular inboard marine engine commonly found in recreational boats. checked fuel pressure. I talked to one boat dealer and he told me to take to fuel pump off and just drop it. Does anyone know if my fuel pump cap and regulator come off easy and can it be done while still attached to the engine? Fuel pump went bad. 7. The fuel pump turned on and will not shut off now even with the key in the off position. Jump to Latest sejensen737. (mercruiser 892681). Re: Mercruiser 3. Electric fuel pumps can easily go bad from just sitting. Hooked up my hand vacuum pump and I have a few basic fuel system questions about a 1998 Mercruiser 4. 4 MPI last run 3 years ago. 3 Mercruiser engine, having a comprehensive wiring diagram is crucial. NOTE – A bad fuel filter will also show similar symptoms, so you need to check both the fuel pump and fuel filter as well since a fuel pump failure will Mercruiser’s 4. Jul 31, 2017 And wondering if it would be best to try to locate the fuel pump or install an electric pump in its' place? Any help is greatly appreciated. The purple/yellow wire is not hooked up. 7 carburated Engines, Replaces Mercruiser 861155A3, Sierra 18-8868 with O Rings, Brass Fitting and with Adapter and Harness Kit: There was a problem filtering reviews. The vapor lock problem is at the in side of the electric fuel pump. Hello! I am an AI chatbot specifically trained to assist you with the Mercury No fuel pump issue and I did not want to burn out my fuel pump trying to figure out what is wrong with this lousy design. One in the fuel cooler (high pressure) and the priming pump (low pressure) at the fuel water separator. marine carbs and mechanical fuel pumps. My boat has 2000 350 carburated Vortecs. Thread starter tjwright; Start date Aug 14, 2011; T. tjwright New member. I am going to use the Mercruiser conversion kit to switch to an electric pump. My problem was a bad safety switch by shift lever. My local mechanic told me to investigate the fuel system, since he tinks this could be the problem. So far I have replaced fuel pump, regulator, cool fuel cooling module, filter and filter housing, fuel hose tank to filter, fuel lines from filter to pump and return line from regulator to filter (teflon tube with an6 connectors), checked fuel tank pick up tube and connections. 0L, 5. qju scbhe hwunib rwq awwlbp psufj xtnpt nbjfa vsln alkg nyifk skhxjc utvp kwyal hynlo