Onan Genny - Help - Looking for suggestions!
Onan Emerald Plus 4000 BGE in a 29' GBM Landau on F53 chassis... Exercised once a month all winter - but then sat from April until now. Now won't start? Cranks fine but doesn't sound like it wants t...
Forum Discussion
Lord have mercy the hours I spent working on my old 4k Onan. Mine was on a 1990 Class A. I had to replace the control board on it one time for a no start condition. I had an issue where it was turning over slow and that kept if from cranking. I replaced the starter and that fixed it. Over the years I did tons of oil changes and a couple of sets of spark plugs. I had the BGE model.
It should slide out on a tray to give you access to the back side of it. Some of these carbs are not rebuild-able. Or at least they make it difficult and dont sell the seals and such. I have heard of people doing it anyway. It could be varnish in the carb but, if you have been exercising it that may not be the issue. Testing fuel flow is easy. Just be bloody careful. Checking for spark is easy as well.
I would note that on mine the no start condition played out like, it would start when the start button was held down but as soon as I let off of the button it died. If the contacts in the generator are dirty and it detects that it's not making power it will immediately quit as well. But, based on what you describe it's a simple no fuel/air or no spark condition. Pull a plug wire, put a plug in the wire, ground it and see if it's getting spark. Or, better yet, get one of those cheap testers from Harbor Freight. If it's making spark then you can reasonably assume, as long as the timing is good, that it's a fuel issue. I would shoot a bit of go juice in the carb and see if it tries to start. If it does then I'd lean towards a fuel air issue.
It should slide out on a tray to give you access to the back side of it. Some of these carbs are not rebuild-able. Or at least they make it difficult and dont sell the seals and such. I have heard of people doing it anyway. It could be varnish in the carb but, if you have been exercising it that may not be the issue. Testing fuel flow is easy. Just be bloody careful. Checking for spark is easy as well.
I would note that on mine the no start condition played out like, it would start when the start button was held down but as soon as I let off of the button it died. If the contacts in the generator are dirty and it detects that it's not making power it will immediately quit as well. But, based on what you describe it's a simple no fuel/air or no spark condition. Pull a plug wire, put a plug in the wire, ground it and see if it's getting spark. Or, better yet, get one of those cheap testers from Harbor Freight. If it's making spark then you can reasonably assume, as long as the timing is good, that it's a fuel issue. I would shoot a bit of go juice in the carb and see if it tries to start. If it does then I'd lean towards a fuel air issue.
