Force 150 Compression?

[HawaiianHooker]

My 1991 150 had about 160lbs of compression
I found a 1992 that has about 120llbs. of compression pretty even in all cylinders. Looking inside, the pistons look to be in very good shape.

Did they drop compression on the 92's??

 

[roscoe]

Re: Force 150 Compression?

Don't think they dropped the compression that much.
They did stop publishing a compression number, and instead gave a range.

Are you using the same compression gauge, and same conditions? (warm engine, throttle wide open, and all sparkplugs out)

Perhaps the motor just needs a thorough decarbing, or needs to be warmed up before testing.

Anything above 120# is healthy for sure.
New, they came with 140 - 155.

 

[Funny Brew]

Re: Force 150 Compression?

Make sure your engine is at normal op temp, then check the compression..

Cold will be higher as mine (120 hp) shows #1-160, #2-170, #3-170, #4-160. cold.