Or maybe you can stick a short piece of the right diameter tubing down over the adjustment screws to guide ur screwdriver.Maybe some plastic tubing on your small flat screw driver will work .
Be wary of doing that, especially with saws that utilize "air injection". Once you put the top cover back on the pressure around the air filter increases which will cause the saw to run leaner. I have seen it increase max RPM by several hundredI see a lot of saws like that with the plastic limiters completely removed. You're right it's hard to find the slot with a screwdriver through the top cover. When I tune these, I remove the top cover so I can see the screw, and have no problem then.
Several hundred rpm increase is a lot. Wow! Now that you mention this I will check the difference with a tach. Maybe I'm lucky then that I usually check the rpm with the top cover on.Be wary of doing that, especially with saws that utilize "air injection". Once you put the top cover back on the pressure around the air filter increases which will cause the saw to run leaner. I have seen it increase max RPM by several hundred
That was actually how I established it for myself... My tacho has a wire that wraps around the spark lead & so I was checking my tune with the cover off... retune... cover on... run saw... retune by ear...... eventually started wondering why it was fluctuating so did some experimentation, followed by a bit of research that confirmed for me it was a legit & I wasn't imagining itSeveral hundred rpm increase is a lot. Wow! Now that you mention this I will check the difference with a tach. Maybe I'm lucky then that I usually check the rpm with the top cover on.