Compression check on 1988 Evinrude 40 HP

BondJmsBond · #1 March 20th, 2007, 01:24 AM

I just replaced a head gasket and did my first compression check ever.
On a 1988 2 cylinder, Evinrude 40 HP outboard, I read 110 in each cylinder with a leak down check of very little psi for a couple of minutes.

Does this sound right, or should the compression check psi be higher?

Thanks

iwombat · #2 March 20th, 2007, 01:45 AM

Sounds just fine to me.

tashasdaddy · #3 March 20th, 2007, 06:33 AM

should run great at 110. below 100 and then worry. a decarb has been known to bring it up even more, clean the crud out of the engine. the run seafoam in your fuel

http://forums.iboats.com/bbBoard.cgi...6;gtid=1035563

you can use the regular seafoam in a spray bottle rather than Deep Creep it's the same stuff just not in areosol.