10 Most Common Kohler Fuel Pump Problems

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By Marvin Tucker

Farming Equipment

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If you’re a Kohler fuel pump owner, chances are you’ve experienced one or more of the common problems that plague these pumps. From the loss of prime to air in the line, these issues can be frustrating—and even dangerous.

Kohler fuel pumps are used in various engines, from lawnmowers to generators. They are considered some of the most durable and reliable fuel pumps.

However, like all mechanical devices, they are not immune to wear and tear – occasionally, something will go wrong. Luckily, there are solutions for all of the problems.

This blog post will walk you through the most common problems with Kohler fuel pumps and how to fix them.

The Most Common Problems with Kohler Fuel Pump

You may have experienced some fuel pump problems if you’re a Kohler engine owner.

Let’s list some of the most common Kohler fuel pump problems and their solutions. Keep reading to learn more.

1. Engine Won’t Start

There are a lot of potential causes for an engine that won’t start, such as a clogged gasoline filter, a defective spark plug, or low fuel pressure.

clogged fuel filter will prevent fuel from reaching the engine, preventing the engine from successfully starting. The solution is to replace the fuel filter.

You should also check the fuel lines for any cracks or leaks. You’ll need to replace the fuel lines if there are cracks or leaks. 

bad spark plug can also prevent your engine from starting. To troubleshoot this issue, replace the bad spark plug with a new one.

Finally, if your fuel pressure is too low, it will not be able to reach the engine and start properly. In this case, you may need to adjust the pressure or replace an out-of-whack fuel pump.

2. Engine Lacks Power 

If your engine lacks power, it could be due to a faulty spark plugclogged fuel filter, or low fuel pressure.

If your spark plug is faulty, it will not be able to power the engine correctly, resulting in decreased power output. To troubleshoot this issue, replace your spark plug with a new one.

Similarly, if your fuel filter becomes clogged or dirty, it will not be able to deliver enough fuel to your engine, resulting in decreased power. You can fix this by simply replacing the fuel filter.

If your fuel pressure is low, it will also result in decreased engine power. You’ll need to adjust the pressure or replace an out-of-whack fuel pump to address this issue.

3. Engine Stalls 

Several potential causes of engine stalling include low gasoline levels, a damaged fuel pump, and unclean carburetors.

The engine will stall if the carburetor is unclean because it won’t supply enough air and gasoline. The solution is to clean or replace the carburetor. 

If your fuel tank is low, you may also experience engine stalling. This will occur because the tank has insufficient fuel to properly lubricate the carburetor, which can cause it to seize or stick open

To avoid this issue, always ensure you have enough fuel in your tank before starting your engine.

Finally, your engine may stall if your fuel pump is broken or malfunctioning. A malfunctioning fuel pump won’t be able to supply enough fuel to the carburetor and engine, which could result in the engine losing power or ceasing to operate altogether.

Make sure your fuel pump is frequently inspected and maintained always to operate properly to avoid this from happening. 

With the proper care and attention, you can prevent your engine from stalling and keep running smoothly for years to come.

4. The Fuel Pump is Not Priming 

The primer bulb is the first item you should examine if your Kohler fuel pump isn’t priming.

The primer bulb draws fuel from the tank and into the pump. It must be replaced if it is cracked or damaged. If the primer bulb looks fine, then the next thing to check is the fuel line.

Ensure that the fuel line is not kinked or blocked – if it is, then air will be unable to enter the pump and will not prime. 

5. Loss of Prime

This is the most common problem with Kohler fuel pumps. It occurs when the pump loses its prime—it can no longer draw fuel from the tank.

The solution is simple: reprime the pump. You can do this by opening the bleed screw and running the pump until fuel comes out. Then, close the bleed screw and restart the engine.

6. The Fuel Pump is Not Building Pressure 

If your Kohler fuel pump is not building pressure, there are two possible causes.

First, check the diaphragm inside the pump. If it is damaged or torn, it will need to be replaced.

Second, check the check valve. The check valve enables air to enter the pump so that it can build pressure – but if it is damaged or stuck open, then air cannot enter the pump and will not build pressure. 

7. The Fuel Pump is Leaking 

If your Kohler fuel pump leaks, there are two possible causes. First, check the O-rings.

The O-rings seal the connection between the pump and the engine – if they are damaged or worn out, they will need to be replaced.

Second, check for cracks or damage in the pump housing. If any cracks or damage are present, the pump will need to be replaced entirely

8. Air in the Line

Another common problem with Kohler fuel pumps is air in the line. This can happen if you run out of fuel or change your fuel filter without bleeding the line first.

The solution is to bleed the line by opening the bleeder screw and running the pump until fuel comes out. Then, close the bleeder screw and restart the engine.

9. Dirty Fuel Filter

dirty fuel filter can cause many problems, including loss of power and poor performance.

The solution is to replace the fuel filter and ensure the engine is adequately primed. With a clean filter, your engine should run smoothly and efficiently again.

10. Incorrectly Installed Pump

If your pump is not installed correctly, it can cause several issues, including poor performance, fuel leaks, and difficulty starting.

Ensure that your pump is installed correctly, that all connections are tight and secure and that the fuel lines are not kinked or blocked.

Additionally, follow all instructions provided by your engine manufacturer when installing your Kohler fuel pump. You can keep your engine running smoothly for years with the proper care and attention.

Kohler Fuel Pump Problems: Are they a deal breaker?

Kohler fuel pump problems can be a big headache for your engine, causing problems like loss of power and poor performance. But with the proper care and attention, you can prevent these issues from ever occurring.

Start by checking your fuel pump regularly to ensure it is working properly. This includes checking the primer bulb and fuel line for damage and the check valve and diaphragm for any issues.

If you notice any problems with your fuel pump, make sure to address them as soon as possible. This may involve replacing the O-rings, checking for leaksbleeding the line, or replacing the filter if necessary.

If you’re experiencing any of these Kohler fuel pump problems, don’t hesitate to take action immediately. Taking care of these issues as soon as possible can prevent them from becoming bigger, more expensive problems.

However, it’s best to consult a professional if you’re still having trouble. They can help you troubleshoot any other issues and ensure that your pump is installed correctly.

Thanks for reading!

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