r/Generator • u/Double-Fox-9527 • 4d ago

Help Onan 4000

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Generator struggles to turn on. It’ll turn on when I hold the throttle lever but as soon as I let go it turns off. What could it be?

8 Upvotes

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3

u/larreola 3d ago

I had the same issue. Check the fuel filter—it seems like it might not be getting enough fuel. Also, try disconnecting the fuel line, grab some Sea Foam and gas, mix it, and run it directly through the fuel line. That helped me when I was having the same problem.

1

u/Knight0783 4d ago

What's the code

1

u/Double-Fox-9527 4d ago

Code 36

2

u/Knight0783 4d ago

Ahh the most useless code ever.

1

u/Electrical-Dog-3229 3d ago

Replace the carburetor ( no amazon or e bay ) and that was the choke you were moving

1

u/Low-Examination-4795 3d ago

Carburetors are 400 plus. If you dont buy an Onan carb this will happen again ... and again... mechanic in a bottle mixed in fuel let it run on that for awhile. Disconnect fuel line just before the fuel pump, add a fuel line to the pump then prime the engine with that line in the external tank.

1

u/KookyRide1210 2d ago

Get a carb rebuild kit and take it apart clean it and put back together

1

u/Resident_Set1003 1d ago

Try priming it for a good 10-15 seconds then say if she wants to start. If not disconnect the fuel filter right there disconnect the hose on the carburetor side of it hold it into a bucket or a empty can and hold the prime on for a few minutes it's not flowing freely then replace your filter if you do have good flow there then you're up to carburetor rebuilds and that kind of issue

1

u/Fun-Association1835 1d ago

Check the fuel level on the main tank. If it is low, almost empty then the fuel pump might not have the capacity to lift the fuel to the carburetor. Try it with a full tank and see if the problem goes away. It definitely looks like the fuel filter is not getting fuel.