My 26ft Tollycraft is running fine with the single Mark IV 454 on a 2:1 V-drive, but I’m wondering if I can improve performance by adjusting the advance curve on the distributor?
This is a 10,000 lb flybridge cruiser, 26’8” LWL, 10’ beam, runs at 7 knots at 1700 rpm most of the time, or 14...