How To Change Fuel Pump On Mercury Outboard

If you’re having problems with your Yamaha or Mercury’s external fuel pump, you’re bound to be disappointed. Maybe your engine is blowing up and stalling while you’re trying to enjoy your day on the water, or you’re burning fuel faster than ever. Either way, the symptoms of a failed fuel pump on an outboard engine can be a headache you don’t see coming, and now you need to know how to recognize your outboard engine fuel pump. are you broken or not. If you’re wondering how to check your fuel pump, system troubleshooting can take less than 30 minutes with minimal repair costs.

WAre caps the symptom of a bad fuel pump on an outboard engine?

SilentWhen you try to start the engine, you should be able to hear the fuel pump working. If you can’t hear that familiar sound, it’s likely a battery problem. Check the battery first, and depending on other symptoms you may be experiencing, you should troubleshoot other systems with one of our helpful guides. However, if you lack that engine sound, it’s a strong indication that the fuel pump may be having a problem.Slow, Stop or StutteringAnother common symptom of a bad fuel pump is misinjection or injection. If you’re experiencing a bumpy ride (or maybe downshifting completely), that could also be a sign of a clogged fuel filter that’s not allowing a steady flow. You will want to check the entire fuel system to make sure that any blockages and blockages in the system are addressed. We outline which fuel system parts you need to check in our Yamaha and Mercury troubleshooting guides.GasUsing fuel quickly is usually a sign that the fuel pump’s condition has deteriorated significantly. You should know how long the gas tank will last. If you notice that your tank is draining faster than usual, it’s time to check your fuel system before more problems arise.HeatIf the temperature on your meter is rising, that is most likely a sign of a faulty fuel pump. Bearing in mind that it could be a sign of other problems, that might be reason enough to check your fuel system for potential problems.

Perform a fuel pump check

How do you test a fuel pump on an outboard engine? Fortunately, there are simple ways to check your fuel pump. This process assumes that you have checked the rest of the fuel system for cracks, leaks, and general signs of wear to ensure continuity between the fuel tank and the pump. You can test this by inflating the priming bulb until it feels stiff. Fuel will easily move from the tank to the pump. Your external fuel filter, located directly in front of the fuel pump, will be full.

Once the engine is off and the rubber cap has been removed, remove the spark plug starter cord and remove the plug

Insert the compression gauge into the spark plug hole. Then, widen the throttle position and pull the starter cord or twist the starter several times.

The appropriate PSI will vary by engine, but in general a low PSI (below 30) means there is a compression problem that is preventing the fuel pump from operating. If you have enough pressure, this is a sign of a bad fuel pump.

The two fuel pump components that are most often the cause of failure are the diaphragm and the check valve. To check them, it will be easiest to remove the pump from the motor.Backflow valveThe check valves are how fuel is delivered to the carburetor. They allow fuel to enter from the tank, as the name implies, in only one direction. This allows enough pressure to be generated to produce a continuous flow. If the valves don’t close properly, they will allow fuel to pass in either direction, which is probably why your outer compartment isn’t receiving fuel. There are two valves to consider here: inlet and outlet. Every pump has at least one of each, but be aware that your pump may have two outputs. The inlet accepts the flow of fuel and will usually be marked with an arrow pointing inward towards the center of the pump. The outlet moves fuel to the rest of the system and can be indicated by an arrow pointing outwards. To test their functionality, you will need a pressure gauge.

Remove the fuel pump

Attach the pressure gauge tube to the outlet

Cover your head with your thumb

Pump the pressure gauge a few times

Release your thumb.

If the pressure drops, it’s a clear indication that the inlet is allowing pressure to escape in both directions and the valves are not in proper working condition.DiaphragmIf the pressure doesn’t release and your fuel pump has a diaphragm, this is what you will check next. The diaphragm is an internal rubber part that pushes fuel through the pump, which is usually only found in mechanical fuel pumps. You can usually see part of the diaphragm through a small hole in the back of the pump. Some signs of damage are leaks, engine shutdowns, or fuel bubbles in the water. To test it, you will need two 10-24 bolts, four washers, and a hose clamp.

Clamp and tighten the pump using bolts and washers. The bolts will go through the holes used to attach the fuel pump to the engine, with washers at the ends. The purpose of this is to maximize the pressure.

Attach fuel line to inlet

Attach another fuel line to the outlet and clamp it tight.

Cover the bulb and notice that hole in the back of the pump. If fuel is clearly leaking through it, your diaphragm has failed.

The fuel pump can easily be repaired using a suitable fuel pump repair kit or replaced completely at very low cost.

How do you prevent external engine fuel pump failure?

Before you Google yourself how to tell if your fuel pump is failing, you should take some precautions. Fortunately, preventing future headaches isn’t difficult. MaintenanceFirst and foremost, make sure you’re performing the recommended routine engine maintenance. Our engine maintenance guide for Yamaha and Mercury boards provides a basic checklist for this procedure, including all the parts that each manufacturer recommends you check for detect cracks, leaks or other signs of damage and wear. However, Yamaha strongly recommends that the external fuel pump be replaced every 3 years. However, there are some specific ways to keep your outboard engine’s fuel system in tip-top shape.Fuel stabilityAnother option to aid engine life is a fuel stabilizer. The fuel stabilizer will keep fuel from spoiling, remove carbon deposits and protect the entire system during months of storage. In addition, fuel additives are needed because gasoline ethanol is not ideal for marine environments. Normal sailing gives the fuel plenty of opportunity to come into contact with the water droplets, which bind to the ethanol and form a mud-like material that is heavier than the rest of the gasoline. Then it sinks to the bottom of the fuel tank. When the fuel system gets this, it can lead to a blockage throughout. Preventing this with a fuel stabilizer can help keep your engine healthy for longer. All the products needed to maintain and protect your fuel system (and everything else) can be found at topqa.info.

Last, Wallx.net sent you details about the topic “How To Change Fuel Pump On Mercury Outboard❤️️”.Hope with useful information that the article “How To Change Fuel Pump On Mercury Outboard” It will help readers to be more interested in “How To Change Fuel Pump On Mercury Outboard [ ❤️️❤️️ ]”.

Posts “How To Change Fuel Pump On Mercury Outboard” posted by on 2021-10-29 15:59:34. Thank you for reading the article at wallx.net