I have a 1989 Force 125HP on a Bayliner Trophy. One motor only revs to 4000RMP at full open. I checked the compression...#1-120PSI. 2-130PSI 3-120 PSI 4-100PSI.<br />I did a wet compression (oil in cylnder) #4-went to 130PSI.<br />Question 1) What is the most likely cause Piston rings or Head...
