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Old 03-20-2011, 08:15 AM   #1
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Location: Marquette, MI
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New Onan Generator won't run!

Error code blinks 3 times and 3 more times indicating low pressure! The generator starts, runs 10 seconds with proper function, then reduces rpms and runs for 5 or 10 more seconds then dies. Both LP tanks are full! Could the problem be a faulty regulator?

The unit is brand new with dealer installation in Michigan but we are wintering in Sarasota.

When the unit reduces RPM's the stove if lit, goes out.
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Old 03-21-2011, 11:39 AM   #2
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Is that code for low gas pressure or low oil pressure? I'm not sure if your unit has a pressurized oiling system but, that would cause it to shut down to prevent internal damage. Check the oil level in the unit, make sure it's full.
However, since you mentioned the stove going out, I'm leaning towards gas pressure problem. But, it wont hurt to check for proper oil level just to eliminate that possibility.

Oh, one more thing - does the stove re-light right away, or does it take awhile before you can re-light it?
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Old 03-21-2011, 01:34 PM   #3
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Oil in gen is full and stove relights immediately.
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Old 03-22-2011, 09:02 AM   #4
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Little Miss Piggy

Turns out I have blocked pigtails with faulty valves. I need the pigtails with larger orifices to accomodate both the RV LP requirements along with the Onan generator LP requred flow. Does anyone know the numbers on the pigtails so I can order them.
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