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Old 06-27-2013, 09:11 AM   #11
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My Class "A" diesel Onan was 8kw. The fuel burn chart for it showed a use of about 1/2 gallon at 1/2 load and just over 1 gallon at full load. Not sure how is uses less fuel if the RPM's remain constant. What do our generator experts believe?
The rpm stays the same but putting a load on it is making the generator work harder to maintain that rpm, therefore it's going to burn more fuel under a load.
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Old 06-27-2013, 09:58 AM   #12
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Oy thing when exercising onan, let it run a little bit once loads are removed before killing it.
Good advice! I had never heard this before; checked the owners manual (mine's LP model), and you're spot on. I have no idea why, but I'm sure there's a good reason. Now to REMEMBER this in the future!
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Old 06-27-2013, 02:32 PM   #13
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A limited off subject, but... We are on vacation heading home to FL from the Grand Canyon, sitting in a cummins Onan repair shop. We lost our second fuel pump on our unit. The first at 2hrs. The second at 21.0 hours. They are getting us fixed up with the wife and kids in the waiting room. Am I the only one having issues?
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Old 06-27-2013, 02:37 PM   #14
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A limited off subject, but... We are on vacation heading home to FL from the Grand Canyon, sitting in a cummins Onan repair shop. We lost our second fuel pump on our unit. The first at 2hrs. The second at 21.0 hours. They are getting us fixed up with the wife and kids in the waiting room. Am I the only one having issues?
I did have issues with my last one, I went through 2 and then replaced it with a low output electric fuel pump and inline filter from napa auto parts and didn't have a problem in 500 hours. So far on my new one I had to replace it once but now it's been going ok...... Knock on wood.
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Old 06-28-2013, 12:19 AM   #15
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We got it replaced at Onan today in Amarillo Texas. Hopefully that will get us home to Orlando. Said they have been replacing tons of them. Some new coaches have been through 4 of them.
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Old 06-28-2013, 01:00 PM   #16
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It's not a hard job to replace them if you have some mechanical skills. I started carrying a spare. Took about 20 minutes to swap out.
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