Hello all,
I have a problem with my riding mower.
I have a 2003 Craftsman riding mower. DLT 3000 42" cut with a Kohler 20hp twin. It's been flawless and required nothing other than oil changes and a couple of blade replacements. The problem is gas fumes coming from the the tank/gas cap after shutdown when it's parked in the garage.
The mower has a 4 gal tank under the seat with the gas cap on the fender. The gas cap has small hole (1/16") in the top as a vent. I would assume the vent is supposed to be one way to allow air into the tank to replace the gas as it's used. The underside of the cap has a rubber gasket and a large 1/8" hole that matches up the with outside hole. I can see a foam type filter inside the cap through the hole. I do not know if there is a one way rubber flapper valve inside the cap or not. Gas is getting up inside the cap and causing fumes. I have put a piece of plastic bag between the cap and tank and that helps somewhat once the gas inside the cap finally evaporates after a couple of days. If I do not put the plastic between them it seems to keep emitting fumes for weeks. It's as if the tank is building pressure and pushing fumes into the cap, keeping what gas is in there from evaporating.
There were no problem for almost the first 4 years I owned the mower, but then the problem started at the end of last season. I have already replaced the cap with a new one and the problem is still just as bad. I've looked, but can't find any obvious leaks from the tank or lines
Thanks
Dave_C
