MS 170 perk up/mod

That is what I run on mine. I like the Stihl PS3 chain. I switched to the .050 chain because I bent a cutter tooth on the .043.

Thanks, Eric. To advance the timing you remove the flywheel and file the flywheel key. Some saws have the key cast in the flywheel. You really should find TDC before moving the flywheel. Mark the flywheel the the case on the saw so you know where TDC is. Then you can use a degree wheel to tell how much you advanced the timing or you can use a timing light to see how much total timing you have.

Here is a video that may be more helpful.

 

Yes the carb will need retuned. The 445 has the key cast in the flywheel.

 

I have a 445. Its a like of junk in my opinion.

I need to do a MAJOR muffler modd on it and see if it wakes up out of its permanent coma it seems those saws are in

 

File the key and index the wheel. Do NOT use lock-tite, on a tapered shaft the nut is the only thing that holds anything the key is there to index it. As far as a muffler mod one of the best things it will do is let heat out, it also give it a little more power.

 

Yea ignition timing would not be a newbie project!!

 

I'll second the "NO LOC-tite".
And add many times the nut isn't needed if was torqued on tight correctly . Although the nut helps when you are snacking the SOB on the crank shaft end to try and get the flywheel off ..
(But with the 170/180 series) you can hold the fly wheel in your fingers( by a fin) off the bench by a few inches, give it a smack on the crank bold(so as to cover the crank end) and it will pop off.