I have a Murray 6.25hp and 22" swath. I have noticed that when I fill the gas tank to more than 1/2 full, it leaks. I have done a little digging and it seems that there is a common problem with these Briggs motors - splitting and causing leaks. To buy a new gas tank, I'd have to mortgage the house so I was wondering if anyone could tell me where I could buy a used gas tank?? I'm in Toronto, Canada. Thanks...