guitarlover519 Posted July 24, 2014 Share Posted July 24, 2014 Generator was running perfectly fine 3 weeks ago, just jumped in and it wont stay running unless I hold the start button down... any ideas why this may be? Quote Link to comment Share on other sites More sharing options...
guitarlover519 Posted July 24, 2014 Author Share Posted July 24, 2014 just messed with what appears to be the air/fuel screw, and got her running... hmmm Quote Link to comment Share on other sites More sharing options...
zero Posted July 24, 2014 Share Posted July 24, 2014 Generator was running perfectly fine 3 weeks ago, just jumped in and it wont stay running unless I hold the start button down... any ideas why this may be? Are you running it on gasoline or propane? If on propane - the electric-fuel-primer engages whenever the starter is cranking. So if it runs with the starter button in - but does not want to when you let off of it - you've got a lean fuel problem. If you are running on gasoline - I have no ideas. Starter button should not make a difference on a newer engine with breakerless magneto ignition. Older ones with battery ignition - yes. Quote Link to comment Share on other sites More sharing options...
Maineah Posted July 24, 2014 Share Posted July 24, 2014 That's a altitude compensator it really does not have much adjustment unless you break the plastic stop. The start side of the switch powers the fuel pump until the engine has oil pressure as read by the oil pressure sender on the engine they have been know to cause your issue.. Quote Link to comment Share on other sites More sharing options...
BobBeery Posted July 24, 2014 Share Posted July 24, 2014 I have an owner's manual dated June 1990 for Onan KV genset. The page on troubleshooting does not list this particular problem, sorry. The closest listed was "unit runs then stops" and gives as possible causes 1) out of fuel 2) oil level too low, and 3) oil level too high. When you get this solved please post what caused it. Quote Link to comment Share on other sites More sharing options...
Maineah Posted July 25, 2014 Share Posted July 25, 2014 Yes low oil or pressure will do the same thing. It is a low pressure oil switch that controls the ign and the fuel pump. when the start is pressed it by pass the oil switch so while it is cranking all of this stays on until the start switch is released. if there is no oil pressure at that point it will not continue to run. If the oil pressure switch is defective and registers no pressure it will stop the engine. Quote Link to comment Share on other sites More sharing options...
guitarlover519 Posted July 25, 2014 Author Share Posted July 25, 2014 Talked to Onan. Its a newish generator with a few safety features. Holding the start button down bypasses these features, thus allowing the unit to stay running. The camper is from California originally, so maybe the altitude adjustment was far off and causing the safety shut off to kill it Quote Link to comment Share on other sites More sharing options...
Maineah Posted July 25, 2014 Share Posted July 25, 2014 Sure other thing can cause a run problem but like you said it ran fine 3 weeks ago so why would the mix change? If you look carefully there is an altitude scale on the adjustment it is possible it was adjusted for high altitude. The only real safety thing on that engine is low oil pressure. Quote Link to comment Share on other sites More sharing options...
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