mid size boat engine and unit options

[JimJet]

Had to resize photo

[Warwick Marflitt]

As the jet unit lifts the water up into itself the weight of the water will lower the hull into the water. So if jet units internal volume is say 40 liters then you've got 40kg of weight moving from river/lake up into unit increasing hull weight.(Newtons Law) Get two buckets of water and lift them off the ground at speed of boat jumping onto acceleration, to give you a hands on idea? Don't stuff your back!!!   

[JimJet]

Forgot to mention.
 My 3.6 with the 3.0 Honda does 12 litres per hour on hour metre. You would have to go direct injection to beat that. I've set the revs to a low 4300rpm so I am only pulling about 160/170hp at those revs rather than 230hp at 6200. Much quieter. The weight of all those internals remains the same (engine, seats, fuel tanks etc) so if you want your boat to have less draft then just add a bit more length/width. It will carry more load, be easier onto the plane, will take off in shallower water but will have a bit more wetted area when planing so a wee bit slower.
My boat does everything you were looking in your 4.2 except the V8 noise and the 100kph.
Cheers.

[silvafox]

Must be time for another one 😉