hi
thanks for all the replys.i have ditched the butties and the waterskiers.
the speed I am trying to go is to keep up with people walking.
the engine ticks over at 1200 rpm(tried reducing it but the engine shakes)
gearbox is a prm 160 oil is a little high if anything.
i have checked prop for damage / debri etc and all is clear(approx. 20" prop)
I can see the propshaft turning but do not know how fast/slow its going.
there are still some revs left in hand.
I have had the boat a while but not gone anywhere until recently and it does seem to be getting worse.
cheers again
kel