I've got a 1989 Mariner 4cyl Magnum on a 15'5" Peterbourgh aluminium boat. It revs 5400 at WOT and goes 26 mph with good hole shot at medium load. It seems to cruise nice at 4200 rpm at 18 mph. At this point I can do two things without seeming to alter rpm or speed. I can tilt up and have a...
Was wondering what the perfect WOT rpm is for a 1989 4cyl mariner magnum. My manuel says 4500-5500.I've got an aluminium Peterbourgh Bass 465.Last year this combination went 26mph at WOT.Boat leaked some and seemed heavy so I tore saturated spray in foam out and repaired haul this spring.Figure...
