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 8000 .7860 It …

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 ads, …

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 about small …

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 carburetor or down …

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, room temp (WTF is …

Aug 12, 2019 · A good compression tester for small engines: Actron CP7828A Professional Compression Tester Kit with 10mm, 12mm, 14mm, 14mm Long Reach, and 18mm Adapters $45 or so

Oct 5, 2009 · I tested it and got 125 sounds low after working on all my saws! Are theses blowers a little lower to begin with or what? I am working on a BG 85 and also an 86 model hand held blower both …

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...

Apr 17, 2019 · If a small engine reads low compression I have a back-up compression tester to confirm such. I've seen instances where a guy would do a chainsaw rebuild due to their testing gauge not …

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 do weedeaters need …