Onan 4000 generator cranks but won't start
Hi all, I have a 2015 Cummins Onan RV QG 4000 generator. It has somewhere between 300-1000hrs (not sure, I've only owned it for about 2 years and it was a previous rental...might not be the origin...
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It appears you have spark, although I’d expect yellow/blue spark.
Also has to if it backfired and lit the ether on fire.
Disconnect fuel line from carb. Prime the pump. Do you hear the fuel pump and are you getting fuel?
Mostly likely cause of well maintained runs fine suddenly not running is the fuel pump. You can see the fuel pump in the generator. It’s in line in the fuel line coming from the tank.
Quick fix, go buy a little electric fuel pump for carburetor from the parts store. They’re relatively universal and about $30-40. If your fuel pump isn’t pumping.
Something else could be blocking fuel from the tank. Not super likely but try sucking fuel through either by mouth with an extension of clear hose so you see before swallowing
Lol. Or a vacuum pump like for changing oil.
Also has to if it backfired and lit the ether on fire.
Disconnect fuel line from carb. Prime the pump. Do you hear the fuel pump and are you getting fuel?
Mostly likely cause of well maintained runs fine suddenly not running is the fuel pump. You can see the fuel pump in the generator. It’s in line in the fuel line coming from the tank.
Quick fix, go buy a little electric fuel pump for carburetor from the parts store. They’re relatively universal and about $30-40. If your fuel pump isn’t pumping.
Something else could be blocking fuel from the tank. Not super likely but try sucking fuel through either by mouth with an extension of clear hose so you see before swallowing
Lol. Or a vacuum pump like for changing oil.
