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Old 07-25-2013, 01:12 PM   #1
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rv generator problems

my onan generator is having issues will start and die,, i had carb rebuilt and new plug and filter changed still doing the same thing so i figured i would try and diag it myself , will run with add alternative fuel added like starting fluid but when i stop adding it dies does anyone have any input sure would apprieate it
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Old 07-25-2013, 01:32 PM   #2
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Speedy: Take a look at this post.

Onan 5.5 bgm surging
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Old 08-01-2013, 07:09 PM   #3
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Low gas, plugged filter or bad fuel pump. Altitude setting not correct.
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Old 08-01-2013, 07:48 PM   #4
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Or a low voltage house battery.

Even just 8 or 9 volts is enough to start the engine, but not enough to give a safe voltage on the output side so the genny shuts itself off to save letting the magic smoke out of electronics.

The down'n'dirty way to diagnose this is to start the genset, if it dies restart it, but this time don't release the start button. If it keeps running with the start button held down you can eliminate a dirty carb, plugged filter, etc., and be reasonably confident it's a 'safety' system issue or other electrical problem.
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Old 08-01-2013, 07:59 PM   #5
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Air filter change time? Describe the exhaust in color and density immediately after start up and 1 minutes into running it


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Originally Posted by speedydave View Post
my onan generator is having issues will start and die,, i had carb rebuilt and new plug and filter changed still doing the same thing so i figured i would try and diag it myself , will run with add alternative fuel added like starting fluid but when i stop adding it dies does anyone have any input sure would apprieate it
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Old 08-19-2013, 07:02 PM   #6
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I would suspect a fuel pump. If you can supply fuel from a tank that is higher than the genset.
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