Onan Generator power surges

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Onan Generator power surges

Home > Discussion Forum > Mechanic's Corner (general)

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All Messages in Thread	Author	Date
Onan Generator power surges	sgaskins	6-6-08
I have 4kW onan generator in my 21' rallye motorhome. Had it out last weekend and the kids were watching tv with the generator running. My wife and i were at the table playin g cards and had the table lamp on, the light was surging bright to dim, and i could hear a faint clicking sound up in the panel where the generator start button is. the light bulb got so hot it melted a small hole in the cover. I shut the generator off, and then the 12v lights didn't work anymore. I checked all the fuses, and after a few minutes all the 12v system worked again. The next day i ran the gen for microwave and the same problem after i shut the gen off no 12v for a few minutes. Can anyone tell me what my trouble might be?
Re: Onan Generator power surges	John	7-6-08
Does the generator motor run at a constant speed or surge? If motor is surging could be a dirty, bad, or carb that needs adjustment. If motor runs at a steady speed could need to adjust your output voltage. DO NOT run your electrics with voltage surging or you will cause a lot of damage to a lot of things
Re: Onan Generator power surges and dies	kspurlock	7-12-08
Went camping on july 4th weekend. Started gen. and all it would do is surge then die. Then it was hard to start, and then the surging would start again. This was all under a " no load" condition. We bought the motor home last year and had no problems. It is a 1987 Onan BGE/BGEL.
Re: Onan Generator power shuts off	vince	8-15-08
My onan generator shuts off after about 10 minutes of running. I took it in, they could not figure out why. I have replaced the pump,plugs,wires,filter. Anybody have any suggestions.It's a 6500 onan.
Re: Onan Generator power surges	ron	8-26-08
Sounds like you got yourself a short in the remote start switch.that will have to be replaced. also, listen or check to see if your gen set is surging if it is you might as well pull the carb and clean it with some canned carb cleaner concentrating on the idle circuit [the little jet]
Re: Onan Generator power surges	monty	10-6-08
I have a 1979 marine application Onan 7.5 genset..engine runs well/good. all of a sudden the voltage started to be irratic..from 50 volts to 110 volts..sometimes it stays at around 110 and just bounces around there but the lights go regular bright to very dim and back and forth...would a voltage regulator do that? or is it a negative/ground problem?..i see a ground wire leading from the outside casing of the generator, i cleaned that up where it connected to my engine block and copper piping, was corroded but didnt fix the problem. any help would be much appreciated, thanks. Monty.