| Gas Tank Fill Leak [message #315614] |
Fri, 07 April 2017 19:30  |
A Hamilto
Messages: 4508
Registered: April 2011
Karma:
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Senior Member |
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Today we drained all but 12 gallons of the 5 year old gas and added some SeaFoam to prevent sticky valve problems, and 20 gallons of ethanol gas to absorb as much water as practical. We drained 10 gallons and added 20, less what leaked on the ground, which I guess was less than a gallon.
While adding the 20 gallons of gas from 5 gallon cans, after the first 10 gallons, we noticed A LOT of gas running onto the ground and it seemed to be coming from the junction of the fill tube to the front tank. It leaks while we are putting gas in, and stops shortly after we stop filling, but doesn't seem to loose all the that was added.
We tried funneling the gas in a way that it stayed in the center of the fill neck, and not into the vent part, with the same leakage.
Again, it doesn't seem to leak all the gas out that we put in. It leaks while we are filling, and stops a little while after we stop. We repeated that test a couple of times.
If it was actually leaking from a fill tube connection, wouldn't it keep leaking until all the gas we put in leaked out? I don't think it is doing that. More like it leaks before the gas from the rear tank (where it wants to go) equalizes with the gas in the front tank.
The level in the tanks is definitely higher than the fill line all the time, yet it doesn't leak all the time, only when gas is being added.
What could be causing it?
The prospective new owner is planning to replace all the rubber lines (fill, vent, engine, Onan, liquid/vapor separator and vent canister), but this is not giving him confidence that he can drive it to where that job can be done. This has the makings of a deal breaker, and I want to keep this "sale" on track.
Thanks in advance for suggestions.
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