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Old 08-13-2019, 11:14 AM   #1
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Onan Gas generator Fuel Cutoff Solenoid.

So I've been having a hard time finding what the Fuel Cutoff Solenoid does on an Onan (such as my 5500QG HGJAB). The best description I've found to date is:
( https://www.justanswer.com/small-eng...generator.html )

This is the fuel shut-off solenoid. It is designed to shut off the flow of fuel when the genset shuts down to (1) Prevent backfiring, and (2) Prevent gas from flowing into the crankcase should the float get stuck.

If this is the case, it is almost impossible for it to cause a shutdown problem on a running generator, because the only way the solenoid does anything is when the computer activates it, and if the computer activated it, the shutdown code wouldn't be a 36 (I have no idea what happened but the generator shut down).

Agree?
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Old 08-13-2019, 02:43 PM   #2
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12v holds the solenoid open, if it loses the 12 volts, it shuts the generators main jet at the bottom of the bowl
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Old 08-13-2019, 02:46 PM   #3
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Quote:
Originally Posted by Jyrocharlie View Post
12v holds the solenoid open, if it loses the 12 volts, it shuts the generators main jet at the bottom of the bowl
Perfect.

So if my genset stop running, and I open the float bowl and almost no fuel comes out, it is not possible for the solenoid to be the issue.
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Old 08-13-2019, 02:56 PM   #4
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Correct. It doesn't stop the fuel from coming into the bowl, only from being drawn into the intake.
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Old 08-13-2019, 03:34 PM   #5
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on one of mine, the fuel pump came apart internally and stopped up the needle and seat orifice. I had to take the fuel line off and blow back through it from the carb to get the pieces out. With the bowl off, almost no fuel came out of the needle when it was stopped up.
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