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 …

Apr 17, 2019 · I've seen quite a few chainsaws that would not start or run and reported as low compression due to guys testing with a automotive compression gauge or their testing gauge …

Nov 13, 2013 · Same piston, same compression ratio, larger combustion volume, then there is less observed pressure on the gauge. The nice compression gauge sets have the Schrader …

Oct 10, 2014 · Some info I saved from threads on this site about small engine compression testing, schrader valves, their location, types of valves, how to build a SMALL ENGINE …

Jan 23, 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 …

Nov 27, 2012 · To be honest I can't give 100% definite answer to that. My educated guess would be that if an engine is being troubleshooted for a will not start issue the dealer then knows the …

Jul 18, 2014 · 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 …

Oct 14, 2013 · I purchased the autozone compression tester to find out if my CS 2150 jonsered still has good comp. I'd noticed that its just as easy to turn over with or without the decomp on. …

Aug 31, 2014 · The category is "small 2-stroke engine". Experts say that 90 psi compression reading will enable starting one, depending on integrity of crank seals. To be able to start, it's …

May 30, 2023 · The Schrader valve must be as close to the combustion chamber as possible, especially on small cc engines. Be cautious if using an adaptor, it can increase combustion …