I have reported that a lost gas cap is pricey to replace & suggested a herbacide cap will work. I have since found a walmart 30 weight 2 gallon oil jug cap works better.I wrapped a piece of duct tape cut in half around tank threads. I have a lot of machines to upkeep,tractors,mowers,ect.I have to keep cost down.Maintenance cost on machines is killing me but has to be done.Every thing seems to go up but wages. Brushog