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09-02-2020, 03:13 PM
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#1
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Junior Member
Join Date: Aug 2019
Posts: 6
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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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09-02-2020, 03:42 PM
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#2
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Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: May 2016
Location: Kamloops, BC, 60 miles from the Center of the Universe according to the Rinpoche, of the SF monks.
Posts: 7,397
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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 & Elna. 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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09-02-2020, 03:46 PM
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#3
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Senior Member
Join Date: May 2017
Location: Vancouver Wash
Posts: 7,227
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Have you checked for spark?
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09-02-2020, 04:10 PM
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#4
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Senior Member
Join Date: May 2018
Posts: 115
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Have you checked fuse in the front switch panel?
__________________
2004 Newmar KSDP 3905
Cummings ISC-330, MM Chassis
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09-02-2020, 05:15 PM
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#5
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Junior Member
Join Date: Aug 2019
Posts: 6
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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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09-02-2020, 07:38 PM
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#6
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Senior Member
Thor Owners Club Freightliner Owners Club
Join Date: Feb 2018
Location: Huntsville, AL.
Posts: 249
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You can’t let gas sit for 5 months. Might need to check out new carb on Amazon.
If it’s going to sit you need to either drain fuel or treat it or you will be disappointed once again.
__________________
Huntsville, Alabama
2018 Thor Palazzo 33.2
2009 Jeep Liberty
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09-02-2020, 07:57 PM
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#7
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Senior Member
Join Date: Jun 2017
Posts: 2,807
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I assume you have primed it?
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09-03-2020, 08:53 AM
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#8
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Senior Member
Join Date: Jan 2017
Posts: 122
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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.
__________________
1992 Winnebago Adventure 34 RQ
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09-27-2020, 08:02 AM
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#9
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Junior Member
Join Date: Jun 2015
Posts: 19
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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
__________________
1995 35' A Class Australian built Winnebago "Classic Freeway"
Cummins 6B intercooled turbo pusher, Allison 4 spd on Spartan Chassis
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09-27-2020, 04:38 PM
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#10
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Senior Member
Join Date: Apr 2020
Location: Parris Island, SC
Posts: 401
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Double check oil level.
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Linear Mode
