3 Common Onan Generator Fuel Pump Problems (Troubleshooting)

onan generator fuel pump troubleshooting
onan generator fuel pump troubleshooting

Onan produces portable generators for your motorhomes and RV vehicles. It can help you out a lot when you’re out on a family trip. These generators are the best inline and can provide you with loads of power.

These are very dependable and will rarely run into any issues. You can choose from a vast product line depending upon your power requirements.

However, some users have recently been complaining about issues with the Onan Generator Fuel Pump not working properly. In this article, we will be going over some common Onan Generator Fuel pump problems and how you can easily troubleshoot them.

Onan Generator Fuel Pump Troubleshooting

  1. Overheating Issues

The main job of the fuel pump is to provide the engine with an adequate amount of fuel after regular intervals. It has to regulate the fuel pressure so that the engine keeps on working properly without any issues.

If you’re noticing high temperature on your Onan engine then it is likely that your fuel pump is malfunctioning which is why the engine is becoming overstressed and is not able to receive a steady supply of fuel.

The first thing you should try is changing the fuel brand you’re using. Sometimes using low-quality fuel can cause you to run into similar issues. This low-quality fuel might be cheaper than your regular fuel but in the long run, it will cost you a lot when your engine breaks down.

So, it is recommended that if your engine is constantly overheating then you should try using fuel from a premium brand. Make sure to read the requirement specification from the user manual of your Onan generator and match the fuel brand accordingly.

You can also take your generator to a repair center to get it fixed. This will ensure that professional mechanics inspect your fuel pump. Doing this will take the guesswork out of the equation and your fuel pump will be fixed in no time. So, if you’re unsure about the actual issue then go to a repair center immediately to save yourself some time.

  1. Engine Efficiency

Another very common issue with a fuel pump is that users keep reporting poor efficiency from their engine. Most often than not this issue is related to the irregular flow of fuel from the pump towards the engine.

The job of the fuel pump is to provide the engine with an optimal flow of fuel. If the fuel pump is pumping an excessive amount of fuel into the engine, then it will start leaking out and evaporating which will decrease the overall engine efficiency.

To fix this issue you need to first check the fuel valves and whether or not they’re working properly. The most effective solution would be to replace the valves inside the fuel pump. Doing this won’t affect your budget that much and it will also save you money in the form of increased efficiency in the long run.

However, if the issue persists then the only solution, you’re left with is to replace the fuel pump altogether. Make sure to buy the replacement from a well-known brand, otherwise, you will be running into similar issues in no time.

  1. Not Bearing Load

Users have mentioned that wherever they try to draw power from the generator or use something that puts a little amount of load on the engine, the generator will turn off and it will take quite a bit of time to turn it back on.

This happens because the fuel pump is not able to keep up with the engine’s demands. Under heavy load the engine requires a little bit more fuel to work properly.

If you’re in a similar situation then you should immediately take your generator to a professional mechanic. He will be able to guide you properly on how you should go about solving this problem. Most often than not it is best to replace the whole fuel system altogether. Doing this will ensure that you will not run into similar issues for a long time.

You can also try using premium quality fuel if you don’t want to get your fuel pump replaced. There is a high chance that changing fuel brand will fix your issue but if it does not then the only option, you’re left with is to buy a replacement pump.

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