MG porting
ArboristSite Guru
OK I have two saws a stihl 064 av ported and decked and a ms660 wich has a meteor jug and slug ported not decked but I did a compression test on both of them and only got 100psi out of them? Yea right I say because you can barely pull them over and they both run stupid strong and start with two or three pulls cold so I'm sure I'm in the right direction and thinking that my compression gage is no good or I just can't spin them over fast enough to get the right reading. What are your guys thoughts on this?? And thanks to you all.