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Old 03-14-2013, 10:06 AM   #11
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it starts runs 10 secs then shuts down that is the time delay for safety on which means the control waits ten secs before lookingat inputs from safeties. I would suspect a oil pressure switch. If possible check it out with a meter with the unit not running it should be closed then start the unit and see if it changes to an open. you put one meter lead on engine block the other on the switch terminal set meter for resistance not running should be close to zero once running reading should be very high. if that seems ok then i would get a mechanical gauge and check oil pressure if you determine it to be ok then try removing wire from switch and see if unit runs but watch gauge for oil pressure if it still shuts down then you more than likely have a wiring or control issue #3 in file is oil switch part number 187-6265
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Old 03-14-2013, 10:23 AM   #12
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Just thought about this. How much gas is in your tank? The generator will shut down if you're under a quarter tank of gasoline. It might start for a brief couple seconds but then just shuts down.
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Old 03-14-2013, 10:43 AM   #13
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Just thought about this. How much gas is in your tank? The generator will shut down if you're under a quarter tank of gasoline. It might start for a brief couple seconds but then just shuts down.
should of thought about that. falls under KISS THEORY. ( keep it simple stupid) and if it stumbles due to fuel more than likely you will get a fc2 oil pressure fault
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Old 03-17-2013, 05:48 PM   #14
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Is your Onan EFI or a caburator version? I have an '02 Georgetown with a 5.5 HJAB and I'm having a very similar problem. I found the service manual on line and I'm still trying things.

Mine has the look of a deliberate shut-down by the electronic controller. I'm getting fault code 32 (blink-blink-blink-pause-blink-blink), which the book says is a "failure to achieve sufficient cranking speed". Since it fires up and runs a couple of seconds, then shuts down, with smoke out of the exhaust pipe, I'm very sceptical that cranking speed is the issue.

On the carb models, there's a solenoid device in the base of the carb that closes off the main jet. This is supposed to stop the "dieseling" that used to plague some cars in the early emission equipment days. I though that might be the problem, but even with 12V hard wired to it (not through the "brain") it still has the problem.

One problem I did find was that the Onan fuel pump (mounted beneath the base plate on the forward edge) was intermittent. We got a new one and installed it, but the problem remains. I'm waiting for drier weather before I go outside for more investigations (it would be nice a bit warmer, too!).
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Old 03-17-2013, 08:09 PM   #15
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Go to a web site smokestack.com I was having a similar problem with my generac Guardian, it ended up being the control board. Just post the make model the problem and someone should help hopefully bassplayer he is very knowledgeable. You might also want to download a troubleshooting manual. Good luck
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Old 03-17-2013, 09:14 PM   #16
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Quote:
Originally Posted by F and E Damp View Post
Is your Onan EFI or a caburator version? I have an '02 Georgetown with a 5.5 HJAB and I'm having a very similar problem. I found the service manual on line and I'm still trying things.

Mine has the look of a deliberate shut-down by the electronic controller. I'm getting fault code 32 (blink-blink-blink-pause-blink-blink), which the book says is a "failure to achieve sufficient cranking speed". Since it fires up and runs a couple of seconds, then shuts down, with smoke out of the exhaust pipe, I'm very sceptical that cranking speed is the issue.

On the carb models, there's a solenoid device in the base of the carb that closes off the main jet. This is supposed to stop the "dieseling" that used to plague some cars in the early emission equipment days. I though that might be the problem, but even with 12V hard wired to it (not through the "brain") it still has the problem.

One problem I did find was that the Onan fuel pump (mounted beneath the base plate on the forward edge) was intermittent. We got a new one and installed it, but the problem remains. I'm waiting for drier weather before I go outside for more investigations (it would be nice a bit warmer, too!).
Manual attached in earlier post
As to cranking speed check the brushes
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Old 03-18-2013, 08:39 PM   #17
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Manual attached in earlier post
As to cranking speed check the brushes

And the charge level of the house batteries. Been there, done that.
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