knightracer_08
New member
Hey i have a 1968 merc 650 on a 14ft run-about, my problem is that this thing should haul ass and it doesnt, last year changed the old beat aluminum 13pitch prop for a 11 pitch pirahna, with the 13 it was boggy when towing the tube or with with four ppl, but empty i could only get about 25mph out of it, now with the 11 pitch it is quick out of the hole, tows awesome, and uses about half the fuel but still only get 21 mph @ 5600 rpm. The compression was 120psi, we were thinking that mabe the timing may be out. any ideas or tips?