360 Mariner Performance

[km1125]

If there were 5 inches of crap on the hull you'd have never made it on plane. It doesn't take much growth at all to increase the load quite a bit. Think of a smooth surface sliding on carpet vs a section of thin sandpaper trying the same thing. Lots of drag added. If there was any 'hard' growth (barnacles) vs 'soft' growth (algae) it knock speed down quickly.

I would believe Carver's numbers would be appropriate ("Carver told me that the boat should cruise at almost 20 knots and should top out at 26 - 27 Knots")

[Dark Horse]

When I took my new to me boat (2001 350 mariner with 350 MPI, semi dirty hull, 4 people and half tank of gas) out for the sea trials we cruised along 16-18 mph at about 3200 rpm. I was told that it would top out about 22 mph

[km1125]

Qr Bbpost When I took my new to me boat (2001 350 mariner with 350 MPI, semi dirty hull, 4 people and half tank of gas) out for the sea trials we cruised along 16-18 mph at about 3200 rpm. I was told that it would top out about 22 mph

Are those 350HP or 350 CI?

[Mn car guy]

My 98 with 7.4 (but about the same hp) Hits 21 mph at 3200 rpm and flat out will do 32 mph at 4400 rpm.