compression @ 130 on a 85 hp

[shawpdx1]

what would be a good compression reading on a 1985 85hp force all 3 cylinders at 130 its been sitting for couple years squirted some oil down the cylinders battery went dead maybe it will come up after I run it?

 

[dorelse]

Re: compression @ 130 on a 85 hp

Mine runs great. Compression is 135lbs across all 3 cylinders, 86 85HP Force...I think you're good at 130.

 

[shawpdx1]

Re: compression @ 130 on a 85 hp

yeah its been sitting for 3 years maybe it will get better after running it
Thanks Eased my mind

 

[jddens]

Re: compression @ 130 on a 85 hp

my 1985 85hp reads 140-142 on all 3. Runs great. The difference is more important than the actual number so as long as they are fairly even you should be ok.

 

[john from md]

Re: compression @ 130 on a 85 hp

My numbers were around 140 and I did a decarb and used a full tank with a can of seafoam and then all are at 150 now.

Do a good decarb, it can't hurt and may bring up your compression.

John

 

[shawpdx1]

Re: compression @ 130 on a 85 hp

how do you do a decarb? maybe I'll do a search

 

[john from md]

Re: compression @ 130 on a 85 hp

Look at the FAQ section at the beginning of the iboats.com maintenance section. It explains it all in detail.

John