Does compression determine horsepower???

[dfrants]

I purchased a 1994 Yamaha 130 for my bass boat. It runs great. I got a Yamaha service manual for it and the specs show that a 130 should have between 134psi and 164psi. I had a compression test done on it before I bought it and it was 125, 129, 130,134. Will this motor be able to produce 130 horsepower if the compression is below specs?

 

[Scott Danforth]

Will this motor be able to produce 130 horsepower if the compression is below specs?

no

yes, compression is directly tied to power output

try yamaha ring-free to see if your compression numbers come back up.

 

[QBhoy]

Those numbers look good to me for that v4. Especially if cold and gauge variance