Originally Posted by atoll
mine has the 15 hp 2cyl z600 kubota, 1.8:1 hurth
box and 12x10 prop which pushes her along nicely,so should fly with a 20 hp and bigger prop.
infact i have a 14x 9 that might suit in the workshop if you have a 2:1 box.
Hi many thanks for the offer.
My shaft is 30mm so I have quite a big prop the idea was because the keel
to the front of the prop is so wide I would lose about 40% of the output of any prop I fitted so went for a big one.
Just hoping now it all works out.