At this moment the main problem I have with outboard motor is terrible splash.
When mounted on the rear beam.
All incoming water is attacking that motor leg at high speed.
I did try my 6HP Suzuki and 18 HP Tohatsu.
On my dingy propeller sit just below hull and leg is protected , water level precisly as should be.
In catamaran propeller is at different depth all the time on our bumpy water.
That is why catamarans have usually propellers at each hull.
Maybe later I should use two electric motors instead of just one, or one sitting at the end of the very long straight shaft - like those used in exotic Thai boats.
another option could be addition of sharp pointing protector in the front of outboard leg to protect from incoming water.
Generally speaking ride on this converted catamaran is very comfortable on moderate bumpy water.
I did try same motors on my other inflatable 3.6 m boat.
For 6 HP dingy is almost useless because planning is possible only at very smooth water, So with small motor catamaran wins hands down.
With bigger both boats go easy above 30 km/h , but unless the splashing problem is not resolved the ride on catamaran is not fun at all
but what skeleton support do you Mark suggest for the poly core deck 2.4 x 6.0 ? Because whole lot will be enclosed in aluminium frame around I could obviously do supporting bars beneath every 1.0 m across and one long in the middle.
