Transom height

[GRIFFON]

There is alot of talk about raising the engine height but can anyone tell me what height is a normal height to run at?

Im just fitting the transom at the moment and have a height from the bottom of v to the top of the transom of 22.5 inches. is this too much for a long shaft outboard. I can reduce the transom height to 21 inches now before fitting, would that be a good idea? Help and ideas welcome.
Cheers Iain

[roofer]

what make of boat? on my boat a phantom 18 i was told the best height is 20 inches.

[GRIFFON]

This is the problem! Its one im building myself.

[GRIFFON]

Or to put it another way..... does the cavitation plate have to be in line with the bottom v or can the engine be fitted higher or does that depend on how deep the v is and the angle of the transom. Any advise would be great.

[Gav]

I used to run a seaquel14 with the cav plate 2" above keel line, and found no difference to when run level???

Any higher and it cavitated while cornering hard.......

perhaps a lifter is your answer
Also as Matt said prop choice is a major factor.........

[Burty]

the lower the prop in the water the better the handleing, but the slower you go.

depending on boat and gearbox IMO i would run with the propshaft between 3" and 4" below the transom, this should give you the best of both worlds. however i think you should try it 4" below first using the top engine hole so as you have lots of adjustment and if it handles ok raise it up a hole and try again.

keep going until you find it doesn't handle or you loose water pressure and this will be your optimum.

there are lots of ways to then improve ie. setback plates and low water pickups but try this first

I run with the prop shaft between level and 3" below depending on water conditions and what i'm trying to do however i have a hydraulic lift and always pull away with the engine at the lowest height and then raise it once on the plane to limit prop slip.

[Burty]

have you tried my suggestions yet?