Senior MTF Member
Join Date: Oct 2009
Location: Lowell area, MA
Re: Primer Bulb sticking on Stihl BG 85 blower...NEED HELP
Not sure what brand carb it is. But I just cleaned out a Zama weed whacker carb. In the process, I sprayed carb cleaner in everything. Apparently, I should not have sprayed it in the primer assembly. It can damage the two checkvalves in there. After cleaning, I had similar symptoms. One valve was kind of sticking, I guess. Once I got some gas through it, it was a little better, but it's still not working right. Now it pumps, but doesn't actually move the gas the way it's supposed to.
The lesson I learned was take the primer bulb, and, more importantly, the piece it attaches to (with the inlet and outlet, and the internal checkvalves) off the carb before starting with the carb cleaner.