Originally Posted by codprawn
Ok I will - at last some detailed answers - love it!!!
Have you tried a transom jack on it or the race boat? Do they make things a bit dicier in the handling dept?
The RIB I am having built is more leisure orientated but it will be my first - my next one who knows - I do tend to take everything I do to extremes!!!
We have used a jack from day 1 in the race boat, the leisure boat will probably not get one unless we want to do some engine height testing -
I really believe that they are at best a waste of money on a leisure boat, and at worst a very easy way of blowing up your moter or crashing! To get any benefit you really need a low water pickup on the gearbox or a transom pickup
As far as handling is concerned they can be dodgy to say the least! Raised up they decrease drag from the gearbox but also reduce the amount of stability both in corners and in a straight line. If the engine is raised too high a boat can swop ends all of a sudden whilst going in a straight line - also cornering grip is reduced greatly, and conventional v's or stepped hulls will spin out and or hook and eject thier occupants! - the only benefit is straight line speed, and with the right prop and gearbox we are talking 5 mph at most with a 5" or 6" lifter.
Lastly if you are getting a lifter use it in the car park only if you have no experience of them, and go and see Neil Holmes and get some tuition on driving race / high performance boats.
Hope that helps,