- 1 Oct 2001
Perusing over this MBC forum since last October has got me wondering about the type of boat and engine(s) that you have and which boats you have them in. Now I see a speedboat going full pelt with an outboard so I presume he has one fwd gear, opened the throttle and is batting along at probably 5-6,000 rpm. So when I see a 40 footer like a Fairline or Sunseeker, as in the adds, batting along at similar speed - does they have diesels or petrols? I know petrols can be happy at high revs but thirsty, also I assume diesels are happier at much lower revs, so do they achieve the speed through a gearbox to increase the screw speed or is through the pitch of the prop or both or something else. Interested to find out if poss. Thanks.