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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Update:
I checked the spark plug. Took it out, then plugged it back into the wire connector and put it against the metal of the engine and when the engine cranked it produced rapid sparks. Yellow/white/orange in color (not blue). Is that significant?
Then I put the spark plug back in.
Then I took off the air filter and I sprayed some starter fluid into the carb area. At least that's what I tried to do. The spray can had a ~4" straw that helped me aim towards the carb opening but wasn't long enough for me to get it 100% into the carb, and because of the angle it was hard to see exactly what I was doing. I gave it 3-4 blast while manually holding the carb flap open. Then I tried starting it up. Didn't seem to make much of an impact and the engine just still cranked and cranked but didn't really seem to get any further. I tried spraying starter fluid 2-3 times more and still nothing. Because of some residual starter fluid spraying into the carb area (the housing that holds the air filter) at one point there was a tiny fire that started burning the excess fuel. I put it out within 5-10 seconds and it didn't look like it had any damage whatsoever. (I had a fire extinguisher next to me during all of this just in case!) Does this imply it is receiving the spark from the spark plug??
I'm not sure where to go from here. Any thoughts??
Thanks!
Chris
I checked the spark plug. Took it out, then plugged it back into the wire connector and put it against the metal of the engine and when the engine cranked it produced rapid sparks. Yellow/white/orange in color (not blue). Is that significant?
Then I put the spark plug back in.
Then I took off the air filter and I sprayed some starter fluid into the carb area. At least that's what I tried to do. The spray can had a ~4" straw that helped me aim towards the carb opening but wasn't long enough for me to get it 100% into the carb, and because of the angle it was hard to see exactly what I was doing. I gave it 3-4 blast while manually holding the carb flap open. Then I tried starting it up. Didn't seem to make much of an impact and the engine just still cranked and cranked but didn't really seem to get any further. I tried spraying starter fluid 2-3 times more and still nothing. Because of some residual starter fluid spraying into the carb area (the housing that holds the air filter) at one point there was a tiny fire that started burning the excess fuel. I put it out within 5-10 seconds and it didn't look like it had any damage whatsoever. (I had a fire extinguisher next to me during all of this just in case!) Does this imply it is receiving the spark from the spark plug??
I'm not sure where to go from here. Any thoughts??
Thanks!
Chris
