See full version: Troubleshooting The Fuel Pump (GM,, )
If the engine does not get at least 50 PSI when cranking, it won't start (and is the surest indicator that the fuel pump will go completely bad in short). If in your case the gauge read 45 to 49 PSI, the engine will eventually start after several attempts as the fuel starts to accumulate on the Pistons or if you spray starting fluid (or carb spray) into the intake.
Also, and probably the last consideration, is that this is an OTC tool, and OTC has been around for a long, long time and makes a ton of automotive specialty tools known for quality. more
The fuel pump produces much more than just 50 PSI of course but the bare minimum the engine needs to start is 50 PSI. Anything less and it will crank for ever before it starts or not start at all. more
Owning a fuel pressure gauge is now becoming a must. All vehicles now use an electrical fuel pump to deliver fuel (under high pressure) to the fuel injectors and the best way to diagnose this fuel pump is with a fuel pressure gauge.
You can find this tutorial in Spanish here: Cómo Probar La Bomba de Combustible (GM 4.3L, 5.0L, 5.7L) (at: autotecnico-online.com).
Since this fuel pressure gauge set is a professional grade technician tool, you can buy most of the components, that make up the set, separately. This comes in handy, because you're able to buy whatever fitting you lose or gets damaged. more
Features
High quality and durable!
Direct fit. Please check your part number and our fitment!
Great replacement for your old one!
Enhance your love car performance! [links]
Fitment/Compatibility
1998 MERCURY MARINE Fuel Pump 4.3L 262
2000 MERCURY MARINE Fuel Pump 5.0L 305
2000 MERCURY MARINE Fuel Pump 5.7L 350
Fits with MCM/MIE 4.3L/V6 and 5.0L/V8 Gen+ and some 350 ci carburetors.
MORE – Product Info Including Updated Prices, Images & Customer Reviews – CLICK HERE
Another more serious symptom of an issue with the fuel pump is a no-start condition. If the fuel pump fails completely — to the point of not being able to provide enough fuel for the engine to run, the vehicle will refuse to start. The engine will still crank when the key is turned, but it will be unable to start due to the lack of fuel. A no-start situation can also be caused by a variety of other issues, so having the vehicle properly diagnosed is highly recommended. [links]
If it seems like you’re filling up your car more than usual, it may be because of an issue within the fuel pump. A valve within the fuel pump may not be opening, causing more fuel than necessary to pour into the engine system. Excess fuel in the engine does not get stored or used.
Fuel pumps are found on virtually all internal combustion engine-equipped vehicles in one form or another. Most fuel pumps are built to last. However, as the vehicle reaches high mileage, it is not uncommon for fuel pumps to require replacement. Another reason fuel pumps fail is regularly keeping less than 1/4 of a tank of fuel in your car. If your vehicle is displaying any of the symptoms above, or you suspect your fuel pump may be having an issue, have the vehicle inspected by a professional technician to determine if the pump should be replaced.
Another symptom commonly associated with a problematic fuel pump is difficulty starting. Because fuel pumps constantly run whenever the ignition is turned on, they can eventually wear out and weaken over time. A weak fuel pump may still pump fuel, but the vehicle may experience difficulty starting from the lack of pressure. A weakened fuel pump can cause the vehicle to take more cranks to start than normal, and in more serious cases may even cause the vehicle to require multiple turns of the key before it will start. more
Irregular resistance inside the fuel pump motor may cause vehicle surging, and indicates a fuel pump in need of repair. Surging feels like the gas pedal has been used. However, it occurs at a random, consistent speed. If this happens often, it may be because of problems within the fuel pump.
One of the surest indicators of a faulty fuel pump is a sputtering engine — typically at high speeds. Should you be driving at a consistently high speed and the engine suddenly sputter before returning to normal operation, it may indicate issues within the fuel pump. In this case, the fuel pump cannot provide a constant stream of fuel to the engine at the ideal pressure. here
These manuals contains an introductory description on and procedures for the inspection, service and overhaul of its main components. General knowledge information is not included. Please read the GENERAL INFORMATION section to familiarize yourself with basic information concerning the inboard engine or stern drive. Read and refer to the other sections in this manual for information regarding proper inspection and service procedures. here
1985-1988 Mercruiser GM V8 ENGINES 305-350-454-482-540 CID Manual
Service Manual Application: 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 & 1998 MerCruiser #11 Bravo MerCruiser Sterndrive Manual , Bravo One Sterndrive Unit Serial # B664190 and Above, Bravo Two Sterndrive Unit Serial # B892613 and Above, Bravo Three Sterndrive Unit Serial # D763691 and Above, Bravo Transom Assembly (Standard) Serial # * B673048 and Above, Bravo Transom Assembly (High Performance) Serial # D796083 and Above, Bravo Transom Assembly (Magnum) Serial # K104738 and Above. Some Standard Bravo Transom Assemblies could have been converted to High Performance Transom Assemblies by use of a High Performance Gimbal Ring Kit (822374A2). Refer to Transom Assembly sections of this manual for identification information. more
MODELS COVERED IN THIS SERVICE MANUAL:
Service Manual Application: All Bravo Models (Serial Number 0M100000 and Above) + Sport Master Models (Serial Number 0M052945 and Above). more