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Old 08-17-2017, 12:54 PM   #43
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Here's another bit of info that I think you'll find helpful. This is right out of the Onan Manual:

Exercising Your Generator
It may seem surprising that “not” using a machine could cause performance problems, but with RV generators that’s exactly the case. Regular “exercise” is an important part of keeping your generator healthy. Lack of exercise can cause moisture build-up and fuel system degradation that make it run poorly. In fact, in as little as 30 days, the fuel in gasoline-powered generators can begin to gum and varnish the fuel system. Fuel varnishing results in hard starting and surging. (A surging generator never settles at a stable operating speed.)

To prevent such problems, it is recommended to run gasoline generators—at a minimum—of 50 percent capacity (2000-watts, or one air conditioner for a 4000-watt set) for two hours once every four weeks. This is necessary to help keep moving parts lubricated, expel moisture and control fuel varnishing in the carburetor.

A long two-hour exercise period is preferable to several short periods. While traveling, this can be accomplished by running the air conditioning. If you own a diesel generator, regular exercising can help reduce internal condensation and helps keep seals lubricated.

See you can see here that you can accomplish three things here. Exercise the Generator, keep the back of the MH cool and keep complaining down to a minimum.
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Old 08-17-2017, 06:20 PM   #44
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The really interesting part of that helpful info is that it only became a 'recommended' thing to do AFTER Cummins bought them.

Maybe Cummins have different product liability lawyers than Onan did?


A friend of mine has a cottage on an island in the Great Lakes, his 'power supply' is an Onan 4KY series genset that came out of an old scrapped RV. It runs weekends only, except for 2 weeks vacation in August, every year from about May to October. It then gets run dry and sits idle, locked in a tin shed on a he shore of that island until the following spring. It's done that for way more than 20 years now. No monthly exercise for 6 months of nasty weather a year. No issues, no failures.

So much for 'recommendations'.
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Old 08-17-2017, 06:30 PM   #45
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Originally Posted by Murf2u View Post
The really interesting part of that helpful info is that it only became a 'recommended' thing to do AFTER Cummins bought them.

Maybe Cummins have different product liability lawyers than Onan did?


A friend of mine has a cottage on an island in the Great Lakes, his 'power supply' is an Onan 4KY series genset that came out of an old scrapped RV. It runs weekends only, except for 2 weeks vacation in August, every year from about May to October. It then gets run dry and sits idle, locked in a tin shed on a he shore of that island until the following spring. It's done that for way more than 20 years now. No monthly exercise for 6 months of nasty weather a year. No issues, no failures.

So much for 'recommendations'.
I agree. And remember, contrary to the RV guy who did my walk thru so ignorantly told me when I got my dp said about my diesel genny: the carb will gum up from non-use if it is not run weekly. Gotta wonder.
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