I have a 1998 Sun Tracker Party Deck 21 that I restored 2 years ago. It had a 75 hp Force which last year I upgraded to a 115 4 cylinder Merc. - With this motor the boat would plane very nicely but not very fast. 25 - 30 MPH.
Just this past week I had a 150 HP Mariner EFI put on it. Now I...
