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Onan Generators Restoring, operating and maintaining vintage Onan generators. When asking new questions about your generator, ALWAYS give your model number AND serial number.

Onan Generators

fuel consumption

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Old 10-30-2011, 07:13:33 PM
cooter 1954 cooter 1954 is offline
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Default fuel consumption

We're in the middle of a noreaster and hydro is out.Now using a 12 ODJC that I purchased a while back.Any ideas to how much fuel per hour it will use at roughy 3/4 load?Thanks.

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Old 10-30-2011, 07:34:02 PM
Wayne 440 Wayne 440 is offline
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Default Re: fuel consumption

about 1 gallon/hr if it is in good condition.

The sales literature claims 1.05GPH at full load.
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Old 10-30-2011, 07:47:52 PM
Gunny Gunny is offline
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Default Re: fuel consumption

At 3/4 load, somewhere between 1/2 to 1 gallon an hour. Probably closer to 1/2, depends on state of tune, type of fuel (#1 or #2 or blend).
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