Onan Propane Generator not starting.
It's a pain to service since it needs to be dropped to do that, I think it needs at least one new spark plug, if I change that and can get it to start but it hasn't been serviced in some time, how lon...
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You need to change both plugs.Since it is a low hour unit. I would check the fuel supply system. There was a problem a few years back. With oil from the propane tanks getting into the system gumming everything up.
