Compression Question

[richve]

Guy's ,I need a few suggestions. I have a 1991 Force 70 HP Ser.#016768 Model 708A91B. My Force Service Manual states #1cyl-125-145 PSI. #2 & #3 cyl-135-150 PSI. I currently have #1-120 PSI, #2-120 PSI, #3-125 PSI. Should I begin looking for a new engine.

 

[roscoe]

Re: Compression Question

No.

Variations in compression gauges, engine temp, and procedure can make a big difference.
Your numbers are very even, and not very low at all.
The manual numbers were "typical values" of new motors.
Your motor should run fine until the numbers drop below 95.

Do a decarb, and it will be fine for another 10 years.

 

[richve]

Re: Compression Question

Thank You, Roscoe, for your reply. My boating season now looks much brighter. Have a Great Day.