Jul 12, 2004 · I found this table to adjust for altitude when performing compression tests: Altitude Factor 1000 .9711 2000 .9428 3000 .9151 4000 .8881 5000 .8617 6000 .8359 7000 .8106 …

Feb 1, 2011 · I've got 6 Stihl chainsaws from 009 to 036 and they all have about 80 to 100 p.s i. compression according to my testing. From reports I've been reading, and in ads, like e-bay …

Oct 5, 2009 · I've worked on several brands of small engines (mostly trimmers & blowers) and tested the compression in them. Most seem to fall in the 120-145 psi range if there is no visible …

May 21, 2024 · Warm compression will generally be a bit less than cold, and wet (with fuel or oil) will be higher than dry. If in doubt, put a small amount of mixed fuel either through the …

Jul 6, 2013 · How do you perform an accurate compression test on a saw ? I've searched and found all kinds of stuff but nothing clear to me. Warm, not warm, run first and allow to cool, …

Apr 16, 2019 · Here is some more info about small engine compression testing, making gauges and schrader valve info from my file and links to posts on this site about such. Link to a video …

Nov 4, 2012 · Compression testing an older Stihl FS85 trimmer. Only gets 75 pounds of compression. Typical chainsaw wants to see 125 minimum or 150 to 160 is better, I think. So …

Apr 10, 2010 · When performing a compression test, is there a certain number pulls it should be based on or do you just keep pulling until the gauge maxes out? -Sean

Aug 25, 2013 · Got a new compression tester for my B-day. Tested my Stihl BR420C Magnum backpack blower and it is only showing 70-80 PSI...runs pretty good though. Tested...

May 18, 2013 · I have the following saws: MS 290 8 years old with little use, compression reads 150 PSI 025 unknown age, compression reads 120 PSI 020T unknown age compression …