3 Common Onan Marquis 7000 Problems (Troubleshooting)

onan marquis 7000 troubleshooting
onan marquis 7000 troubleshooting

It is always best to tune up your generator after a few weeks to extend the life of your device. This process will allow you to get the maximum efficiency from your generator and you won’t have to buy a replacement any time soon.

You can buy the tune-up kit from eBay and it should have everything that you might need to tune up your generator.

The Onan Marquis 7000 is currently one of the most used generators in RVs. Overall, this electricity generator is very reliable but you can still face some problems now and then. This is why we will cover some troubleshooting methods to help you with these common problems with Onan Marquis 7000.

Onan Marquis 7000 Troubleshooting

  1. Load Issues

There have been quite a few complaints regarding Onan Marquis 7000 shutting down when you put a little bit of load on it. Now, if you’re putting excessive load on the generator then it is bound to behave like this.

However, if you’re sure that the load is within the recommended limits then there are quite a few factors that can contribute to this behavior. So, if your Onan Marquis 7000 is unable to handle even a little bit of load then here is what you should do.

If you’ve had this generator for a long time then you should look towards replacing the fuel pump on your generator. It may be that the supply of fuel is not regular which is creating problems for your device. To fix the load issues, you should hire a mechanic to replace the fuel pump on your Onan Marquis 7000.

It can be pretty expensive to fix this problem, which is why it is always recommended to use high-quality fuel. Using high-quality fuel will serve you well in the long run even if you have to pay a bit more every time you refuel.

  1. Onan Not Starting

Some Onan customers have also pointed out issues with starting the generator. Now, this issue might not be as serious as compared to other problems but it can still be quite annoying.

The starter won’t work properly and you will be unable to run the generator.  Mostly, you are looking at battery or cable issues when you are unable to start the generator. So, if you’re having difficulties with starting your Onan Marquis 7000 then follow the steps mentioned below.

Before going to the mechanic, you should first check the battery terminals and cables to see if everything is connected properly or not. Loose battery connections can create this problem from time to time. However, if you’ve inspected all the battery connections and you can’t find the problem then it is likely that the battery itself is drained.

You can try using some jumper cables to see if you can get the generator to work. If nothing seems to help you out with starting the generator then you might have to buy a battery replacement for your Onan Marquis 7000. Make sure to not abuse the starter if the generator is not running within 10 seconds of using the button.

  1. No Output

Another issue with Onan Marquis 7000 is that the customers will have difficulty getting output from the generator. Even if the generator is running, you won’t get any power from the electricity generator.

This is a recurring problem with Onan users but luckily the fix for this issue is quite simple. You won’t have to follow any complex steps to get the generator working again. So, if your Onan Marquis 7000 is not giving output then try doing this.

Check the status of breakers on the side of your generator to make sure that they are not tripped. As long as they are in the tripped position, you won’t get any power from the generator. The two breakers are not exposed and you need to access the right side of your generator to switch the breakers.

The problem should be resolved after you switch the breakers into the correct position. However, if it doesn’t work then you might have to check the wiring or take your generator to a mechanic for thorough inspections. That way you can find out whether the problem was internal or not.

1 thought on “3 Common Onan Marquis 7000 Problems (Troubleshooting)”

  1. My Oman 7000 was running under load for about 15 minutes and then died. It will not restart. I have a full tank of fuel. It wii just turnover with out starting. Any ideas as to what the problem could be?


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