Posts: 20,381
Threads: 4
Joined: Sep 2007
Location: CinDay
TK blades have been specialty made for a long time, but in general use it's only been the last 10 to 15 years they have really sprung up as a choice. With that in mind any saw that predates that time period could have a problem. The guy I got my General 350 from couldn't understand why his saw guard quit working for him???? He had a WWII TK blade on it. I don't think he even knew.
The way the OP had asked the question I had assumed he had changed nothing, and it used to work ok. I suppose that is a questioned to be asked? Did this just occur after putting on a new blade?
Worst thing they can do is cook ya and eat ya
GW