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Old 06-30-2019, 10:42 AM   #1
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Generator Running Out of Gas

Howdy Folks,

I have a 2017 Puma 5th wheel toyhauler. When using the onboard generator which is fed fuel by the fueling station tank onboard it runs out of fuel after about 3 hours. The gauge for the tank shows over half full. I verified there was fuel by adding 10 gallons. If you fill the tank completely it will run about three hours and then just quit. Any ideas on what to look for.

Thanks
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Old 06-30-2019, 10:51 AM   #2
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I'm assuming your onboard generator is an Onan, which has a fuel pump.
I would start with the simplest check: the generator fuel filter. Also, when it quits, check the fuel drain to see if it is dry or if there is fuel still in the bowl.
Next I would investigate the tank outlet, fuel line, and venting mechanism (vented cap?).
When the generator runs out of gas, can you get fuel out of your fueling station? Does it have it's own pump and filter, or is it gravity?
Have you searched the Onan (assuming it's an Onan) site for your problem?
Others have suggested looking at oil level/sensor and overheating. Although three hours is a long time to run for a sensor problem.
Good luck!
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