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Old 12-01-2015, 02:51 AM   #1
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Strong gasoline odor!!

This is my 3rd attempt to post!...no idea where the other ones went, probably floating in cyber space!
However I be-leave I have a unique situation, & I'm at my wits end!
I own a 2014 Coachman Concord, 300TS, c/w an Onan 4000kw gasoline gen. set.
When we are dry camping & run our generator for an hour or more at one time, ... all is well. However, after shutting down & after a period of 5 to 10 min. a very strong gasoline smell is evident around the MH, inside & outside (windows closed), this lasts for approx 15 min.
Now for the crunch, this will only happen if our fuel tank in the MH is more than approx 3/4 full!
I have checked for leaks & or staining around the onan carberator & followed the fuel line all the way to the top of the fuel tank, NO LEAKS. I even used my remote camera to reach above the tank & the MH floor, ... NOTHING visible!!
My background is a machinist by trade, quite mechanically inclined & do most of my own servicing etc, but this one has me stumped!
I talked with the local onan dealer & they say bring it in for a check-up, this would probably be very expensive.
I'm sure your wondering why I haven't gone to my dealer for warranty, well I would rather not discuss that as I found them as useless as #&%$@.
I also have not been in touch with any one at the factory as of yet; I would like to, but don't know whom I should speak with, a name & number would be very much appreciated.
Better yet, maybe someone out there knows what the problem is!!!
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Old 12-01-2015, 06:50 AM   #2
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Just a shot in the dark but check the evap canister for loose fitting or bad hose. I believe it is located inside one of the frame rails if you have an e450.
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Old 12-01-2015, 08:15 AM   #3
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Quote:
Originally Posted by TakeItEasy View Post
Just a shot in the dark but check the evap canister for loose fitting or bad hose. I believe it is located inside one of the frame rails if you have an e450.

Even the slightest leak would throw an engine light.
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Old 12-01-2015, 08:56 AM   #4
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Check oil in gen, see if it smells of gas. with the gas we have now and the right conditions with heat/run time, may be boiling out some gas from gen. Just a thought, but easy enough to rule out!
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Old 12-01-2015, 08:59 AM   #5
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Suggestion:
Check the fitting on your onan fuel pump. It looks like this:
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Old 12-01-2015, 10:55 AM   #6
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Just a shot in the dark but check the evap canister for loose fitting or bad hose. I believe it is located inside one of the frame rails if you have an e450.

Good point, yes it is an e450, & i never thought to check that, will have to refill the tank once more to test,
Thankyou
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Old 12-01-2015, 11:02 AM   #7
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Check oil in gen, see if it smells of gas. with the gas we have now and the right conditions with heat/run time, may be boiling out some gas from gen. Just a thought, but easy enough to rule out!

But why the smell only when the fuel ta nk is full?
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Old 12-01-2015, 11:04 AM   #8
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Originally Posted by Duckogram View Post
Suggestion:
Check the fitting on your onan fuel pump. It looks like this:

But I only get the smell when the fuel
l tank is full!!
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Old 12-01-2015, 01:10 PM   #9
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If you are under warranty you go right to Cummins and not to or through your RV dealer.

They will require a copy of your bill of sale to establish your beginning of service / warranty period date.

If you don't have an extended plan, consider Cummins extended plan. Being a cash customer with them is like being a cash customer at the hospital - a giant ouch.


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Old 12-01-2015, 01:40 PM   #10
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If you are under warranty you go right to Cummins and not to or through your RV dealer.

They will require a copy of your bill of sale to establish your beginning of service / warranty period date.

If you don't have an extended plan, consider Cummins extended plan. Being a cash customer with them is like being a cash customer at the hospital - a giant ouch.


Life is always better under a Palm tree...

2016 Mirada 35BH "Trolley"
2016 Jeep Cherokee Latitude

Previous- Jayco Greyhawk 31FK

Western NY

Tks, but to my knowledge Cummins is diesel, I'm talking gasoline!
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