Originally posted by Hightower
you know that we talked about the fact my prop seems to be oversize (pending mechanical/electrical issues) the other week. Someone I was speaking to the other day said that if the engine was raised, that would increase the revs. Do you think that's right? Perhaps he was thinking of surface props!
Need to concentrate on getting Kohaku into the water first though.
The Honda props are definitely not surface piercing props although most props can work quite high on the transom.
Be very very carefull when raising engines high - you must have sufficient water pressure for the engine to cool - Race engines have the water pickup mounted on the nose of the gearbox - leisure engines get thier water from the side of the gearbox several inches higher!
Raising the engine will give you more revs if it is under revving before, and will probably make you go faster as well. It will usually give more slip on acceleration so won't be as good for skiing for instance!
We run lifters on the raceboat because of the benefits, but we will only fit them on the leisure boat by request as they are very expensive!