4 Common Onan Marquis 7000 Problems (Troubleshooting)

Onan Marquis 7000 Troubleshooting
Onan Marquis 7000 Troubleshooting

When it comes to generators, Onan has been dominating the market for eight decades. It is a go-to choice for millions of users. Its generators are known for their ultimate performance and durability.

The Onan Marquis 7000 is one of the most sought-after generators by Onan. It is powerful yet operates quietly. Nonetheless, customers have recently complained about issues with their Onan Marquis 7000.

We’ll go over some of those problems and their reasons in this article. Read on to learn more about them.

Onan Marquis 7000 Troubleshooting

1. Load Issues

Quite a few people have complained that the Onan Marquis 7000 power system cuts out under light loads. This behavior is expected when the generator is forced to do more than it can handle.

Even if you know that the load is within the safe limits, the generator can fail sometimes. Here’s what you must do if your Onan Marquis 7000 can’t take any load.

You should consider changing the fuel pump on your generator if you’ve been using it for a long time.

The irregularity in the supply of gasoline could be the cause of this issue. Like all other components, the fuel pump is also susceptible to wear and tear over time. If it has worn out, get a new pump and have a professional install it.

In addition to that, consider investing in high-quality fuel. Even if you have to spend a little more money every time you fill up, using premium fuel is worth its price in the long term.

2. Not Starting

Many users have had a hard time starting the generator. When the generator doesn’t turn on, it’s usually due to a dead battery or a loose cable.

It is recommended that you examine the battery terminals and cables for corrosion and secure connection before taking the generator to a repair shop.

If you’ve checked the battery and all its connections and still can’t diagnose the problem, it’s probably dead.

You may need to replace the battery in your Onan Marquis 7000 if you’ve tried all other options for getting the generator to turn on.

Use jumper connections and see if you can get the generator to start. If the generator doesn’t start within 10 seconds of pressing the button, stop using the starter and get it fixed.

Jumper Cable

3. No Output

You may notice that the Onan generator doesn’t give any output sometimes. In such cases, you will get no power, even if it is running.

If the generator stops operating, you won’t have to go through a long and complicated process to fix it in most cases. So, if your Onan Marquis 7000 is not producing any power, here is how you can fix it.

The generator’s side breakers should be checked to ensure they have not been tripped. The generator won’t produce any electricity while the switches are in the tripped state. Check both breakers and make sure they are in the right position.

The problem should likely be fixed after resetting the circuit breakers. If it doesn’t, you might have to inspect the wiring or have a professional inspect your generator.

4. Configure Altitude Settings

Your RV’s generator probably malfunctioned due to the high altitude at which you were camping or traversing, which is likely the case if you spent time in the mountains or on other excursions.

Most Onan generators can generally function between 0 and 2500 feet in altitude, but their output drops significantly after that.

Because of the lower air pressure at greater altitudes, generators have a more difficult time sparking. The high altitude increases the generator’s vulnerability to outside elements.

The electronic components may fail, or external conditions like high humidity may cause the generator unit to become wet and short out. This short circuit may result in an error code 15 being displayed by the generator.

Simply operating the generator at a lower altitude will fix the problem. Get it fixed by a generator repair professional, and it should start working again.

Camping at low altitude

Changing the Altitude Settings

Onan generators have an option for adjusting their settings for use at different altitudes. The user can adjust the generator’s altitude to accommodate different atmospheric pressure levels.

Selecting the appropriate oil and fuel for the generator’s power supply is essential when operating at high altitudes.

Keep in mind that you will need the dial for changing the generator’s altitude settings, or adjusting its parameters is impossible without the dial.

The Bottom Line

With a long history of success, Onan has earned its reputation as a reliable manufacturer of high-quality generators. We have mentioned several problems associated with Onan generators, along with their easy solutions, in this article.

However, regular maintenance is the most practical and long-term approach and will surely help you develop a lasting partnership with your RV’s Onan generator.

1 thought on “4 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?

    Reply

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