I've had problems with filter clogging in my chain saw. While doing inspection of gas cap I noticed that the rubber gasket was showing signs of deterioration, as the saw is over forty years old I decided to look for a replacement cap to maybe slow the clogging of the carburetor filter. I went online and found Jack's Small Engines and found a cap that would fit. It fits well, so only time will tell on the clog problem. Thanks.