420 gas cylinder compression

General help and support for your Lindeman through 2010 John Deere crawler
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Paul Buhler
350 crawler
350 crawler
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420 gas cylinder compression

Post by Paul Buhler » Sat Aug 16, 2008 3:12 pm

Does anyone know how many pounds of compression a tight 420 gas engine runs? Thanks.
Paul Buhler
Killington, VT
420c 5 roll with 62 blade, FOPS, and Gearmatic 8a winch
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Lavoy
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Post by Lavoy » Sun Aug 17, 2008 11:48 am

90-120 psi is what sticks in my head.
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Paul Buhler
350 crawler
350 crawler
Posts: 991
Joined: Wed May 21, 2008 6:25 pm
Location: Killington, VT

Post by Paul Buhler » Mon Aug 18, 2008 8:26 am

Thanks, I'm getting 125 and 128. My machine came with a glopped up air cleaner, and it appears that it was run that way for quite a while. I cleaned everything up and tuned the engine to specs, and it seems to be running quite well. I changed the oil yesterday and a lot of carbon bits (no metal) came out with it so I think the machine is on the road to recovery. Paul
Paul Buhler
Killington, VT
420c 5 roll with 62 blade, FOPS, and Gearmatic 8a winch
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