General info on a 1994 Force 40hp motor

[YoMoma]

Spent some time tonight looking for info on this motor. All I could come up with, using the serial number, was the year it was manufactured.
It seems to be an original to my 1994 Sylvan V16 Sea Troller I just purchased last week.
The info I`d like to know is what the top rpm and compression ratio for this particular motor is.
Also, the motor seems to have a substantial amount of what seems to be hard water deposits on the casing. I`ve used a 3 to 1 ratio of vinegar to water, but that did nothing. Even used hull cleaner on it to no avail.
What is a product that will cut through this easily? I`ve even thought of trying car wax.
Thanks for any feedback.

 

[jerryjerry05]

Re: General info on a 1994 Force 40hp motor

CLR or any lime remover.
You might eat through the paint?
Then it might start eating through the aluminum??
The compression 145-155 with a good guage.
Yours might read different than mine.
The important thing is both cylinders read the same,or real close to each other.
RPM;s 5200-5500.

 

[balbrandon]

Re: General info on a 1994 Force 40hp motor

Would you happen to know the Part number for a tilt/trim pump for this model?

 

[jerryjerry05]

Re: General info on a 1994 Force 40hp motor

balbrandon, you should start your own posts. Adding someting on anothers post is frowned upon.
Oh Yea Welcome.
Always include: serial# model# and any info that might be helpful.
They made 3 different pump styles and without the serial# I'd be guessing?
Fill out the profile,location too.