Onan 5.5 HGJAB start UPDATE
When I try to start my Onan 5.5 HGJAB (Gas) the lights dim and maybe 1 click. I've tried it plugged in to shore power and also with the engine running. Batteries are fairly new, clean, full of water, ...
Forum Discussion
If it just clicks when you push the starter button, then you either don't have enough voltage due to bad battery...which you've eliminated....or you have a bad ground....which it sounds like you've also eliminated. So, you may have a hung starter motor or the flywheel is stuck. Not at all impossible since it sits in the open air and can get a slight rust coating that might hold it from turning. If you can get a pry bar in there without damaging anything, try to manually turn the flywheel over a few times and then try to start again. If that doesn't do it, then try tapping on the starter motor with a hammer to see if the bendix gear is stuck and won't let it turn.
