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06-29-2021, 03:32 PM #1
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Brand New Onan 4000 generator not running
Full tank of fuel. Will prime but does not turn over. Started to run for a minute once but then quit. Just got this camper in may. They started and ran generator at the dealer and all went fine.
Just tried to run it today and will not work.
Any suggestions are greatly appreciated2021 Grand Design Momentum 31G
(Previously 2019 GD Momentum 21G)
2018 Chevy Silverado 3500 HD Diesel
2017 H-D Softail Slim S
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06-29-2021, 03:36 PM #2
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06-29-2021, 03:42 PM #3
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Good questions!
Brand new fuel added to fill tank today with the exception of maybe 2 gallons that were in there since may. Dealer demo was at that time also. Starting off the battery. I had just parked an unhooked from tow vehicle. I did prime and start right on the genny.2021 Grand Design Momentum 31G
(Previously 2019 GD Momentum 21G)
2018 Chevy Silverado 3500 HD Diesel
2017 H-D Softail Slim S
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06-29-2021, 03:48 PM #4
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Start with the easy stuff, lol. How long are you holding the prime button down before attempting to start? I know it can take a bit to prime if tank gets low and is refilled.
Also... this had helped me in the past.
https://www.flightsystems.com/pdf/on...ting-guide.pdf
Newly full timing in our 2021 Momentum 395MS-R with our tow pig being a 2021 F-450 KR
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06-30-2021, 06:08 AM #5
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06-30-2021, 11:02 AM #6
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Ok thanks I will try with more power. Is it ok to start it connected to shore power and then just disconnect once running?
2021 Grand Design Momentum 31G
(Previously 2019 GD Momentum 21G)
2018 Chevy Silverado 3500 HD Diesel
2017 H-D Softail Slim S
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06-30-2021, 11:03 AM #7
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Thank you for the help sheet! So I sprayed a small amount of starter gas into the intake as suggested on that troubleshooting. It tan fine until that is burned off. So maybe a fuel problem?
Also, Holding down prime button for a good 10-15 seconds. Can hear it getting primed and the light clicks on.2021 Grand Design Momentum 31G
(Previously 2019 GD Momentum 21G)
2018 Chevy Silverado 3500 HD Diesel
2017 H-D Softail Slim S
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06-30-2021, 12:55 PM #8
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Personally I wouldn't start with it plugged into shore power. I've seen mechanics do it but I wouldn't.
RedLocation - Wherever the road takes us...Full-timers
2015 Momentum 380
2019 Ram Dually
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06-30-2021, 01:04 PM #9
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Yes I didn’t think that was a good idea. I don’t think it is a battery issue but I will check the voltage on it to be sure
2021 Grand Design Momentum 31G
(Previously 2019 GD Momentum 21G)
2018 Chevy Silverado 3500 HD Diesel
2017 H-D Softail Slim S
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06-30-2021, 01:53 PM #10
The ethanol blend gas sitting in it since initial start either clogged the fuel filter or ate a seal in the fuel pump if it fired or ran on starter fluid.
Rob & Nikki + Cloverfield
2020 Grand Design Solitude S-Class 3350RL
2015 RAM 3500 Longhorn Laramie Crew Cab, Long Bed, 4x4 Dually Cummins/AISIN
Mountains of Pennsylvania
Coleman OEM soft starts install...
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