10foot aluminium jon boat! yes certainly no race hull but a super fast fishing hull!
weight is important as although i live 5mins from a river, there aint no boat ramp.
Thus i have to carry both boat and motor to the water. If i built a DIY outboard with say a 200cc go cart race engine, i should be able to get 15hp out of 20 ish kg.
have you run you design yet? what size prop shaft do you recomend, and what bearings did you use?
there is also the option of using a vertical shaft motor and conecting straight to an old outboard gear case.
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