Tuna i cringe at the thought of a skeg and stainless steel prop repair on a brand new Yamaha 70hp 4 stroke but here is what others are getting at by using an auxiliary motor
My new boat will have 50mm deadrise over 1000mm so the difference running an auxilliary will be negligible.
Contemplating tunnelling the boat as well.
Jack.
Put twins on then. A choice of quite a few locals to me for shallow bar crossings
Garry
Retired Honda Master Tech
i think this is not a very thought out idea running a 70hp in 30cm of water at any speed, the 70hp outboards step up to one of the larger gearboxes so from cav plate to keel is probably over 30cm than the weight of the boat and fishing gear plus fuel
Old mates dead rise is less than 50mm per 1 meter