My onan 4k won't stay running

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My onan 4k won't stay running

Home > Discussion Forum > Mechanic's Corner - Electrical

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All Messages in Thread	Author	Date
My onan 4k won't stay running	Bud S	8-31-07
Onan won,t stay running unless you hold the start switch in let it go and generator dies and blows 5 amp fuse.
Re: my onan 4k won't stay running	Blake	8-19-08
You either have a shutdown thats tripping you up,like a bad low oil psi switch or(possible) high temp switch.....or you are the recipeient of the lovely curse of NO AC output. im leaning toward an output problem though $$ to doughnuts i dunno how savy you are,but a multimeter is very handy. its nice to try and check output at the gen while trying to run it. does it have a circuit reaker on the gen,or a j box that the gen is tied into? access at an easy point for checking ac output. do i have to say be careful and dont stand in water while holding a gas can and smoking while checking output? get a helper,so you can hold the meter while they try to start it. im a standby gen tech,but ive had to "dabble " in rvs from time to time.ive probably have worked on those and id know it if i saw it. if no output,you need to test. it involves stuff like checking resistances on the rotor+stator,and brushes if it has those +possibly "flashing" the unit while checking for output.if its no output,id post a new thread