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Old 09-02-2020, 03:13 PM   #1
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Onan Gen Will crank, but not start

I have an Onan Generator on my 2017 Forrest River Georgetown 24W3
Model 4KYFA - 26100P with 40 Hrs on it. It will crank all day, but won't start. have changed the spark plug, air filter, oil, gas is flowing thru the fuel filter. Don't know what else it could be. Would appreciate any help!
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Old 09-02-2020, 03:42 PM   #2
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How long since it was running?
Squirt a little gas into the air intake, and see if it tries to start.
Common problem is gummed up carb jets from sitting.
Happy Glamping.Norman, 2008 Winnebago Adventurer 38J, W24, dozens of small thirsty ponies. Retired after 40 years wrenching on trucks! 2010 Ford Ranger toad with bicycles or KLR 650 in the back. Easy to spot an RVer, they always walk around with a screwdriver or wrench in one hand!
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Old 09-02-2020, 03:46 PM   #3
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Have you checked for spark?
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Old 09-02-2020, 04:10 PM   #4
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Have you checked fuse in the front switch panel?
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Old 09-02-2020, 05:15 PM   #5
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it's been 5 months since I started it last, All good questions, haven't tried any of these possible solutions, but I will, thanks for the suggestions.
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Old 09-02-2020, 07:38 PM   #6
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You canít let gas sit for 5 months. Might need to check out new carb on Amazon.

If itís going to sit you need to either drain fuel or treat it or you will be disappointed once again.
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Old 09-02-2020, 07:57 PM   #7
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I assume you have primed it?
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Old 09-03-2020, 08:53 AM   #8
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check the battery switch on the dash. I had the same problem. finally check the battery switch and it was off.
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Old 09-27-2020, 08:02 AM   #9
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Hi, did you find the fault? You probably have it fixed I'm sure..However another chk is for a low oil switch if fitted - Disconnect wire from that as they can fail despite oil level is ok.

Also chk the ohms reading of the ignition coil. Connect multimeter on resistance range between earth and primary terminal (where small coloured but not black wire connects) and then earth and sparkplug wire terminal inside plug cover.

Mine is a KYFR...B and correct primary ohms is .05 and sparkplug 1100 ohms. Anything very close to these figs means coil is probably ok.

Cheers from OZ
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Old 09-27-2020, 04:38 PM   #10
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Double check oil level.
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