5500 Onan starts then dies, help please
2008 Onan 5500 that I neglected and did not run every month with load since May. Using start switch on the generator, first priming then start the gen. It starts and runs ONLY as long as I hold almost...
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Sounds like it's not getting enough fuel.
Check the filter at the carb, is it clogged?
Also run it and then let it quit, then take off the bowl on the bottom of the carb, it it empty or full of gas, should be full.
IIRC, there may be a solenoid on the bottom of the bowl to let gas into the main jet, that's electrically actuated. You may use a trouble-light to check it.
Check to see you fuel pump is working, remove the fuel line from the filter at the carb and put a bit of hose on it to let it drain into a can or something (instead of spraying gas all over) and try to start it, do you get a good flow of gas ?
BTW , Seafoam won't clean anything, it's more of a lubricant. Use Berryman's B12, that will dissolve varnish, pull the air filter and spray some into every tiny hole you can see in the intake. Best to remove that carb and take it apart and spray out all the passages, but that's only after all else fails. Wear gloves and glasses, B12 is nasty stuff on skin and eyes.
Check the filter at the carb, is it clogged?
Also run it and then let it quit, then take off the bowl on the bottom of the carb, it it empty or full of gas, should be full.
IIRC, there may be a solenoid on the bottom of the bowl to let gas into the main jet, that's electrically actuated. You may use a trouble-light to check it.
Check to see you fuel pump is working, remove the fuel line from the filter at the carb and put a bit of hose on it to let it drain into a can or something (instead of spraying gas all over) and try to start it, do you get a good flow of gas ?
BTW , Seafoam won't clean anything, it's more of a lubricant. Use Berryman's B12, that will dissolve varnish, pull the air filter and spray some into every tiny hole you can see in the intake. Best to remove that carb and take it apart and spray out all the passages, but that's only after all else fails. Wear gloves and glasses, B12 is nasty stuff on skin and eyes.
