We've run large sections of the ICW
with a outboard powered PDQ36 catamaran
, usually running just one engine
to save fuel
. So conceptually, the ICW route
works with a transom mounted outboard.
However, if the 20hp dinghy
engine has a short or standard shaft then I'd be very concerned with swamping the engine if it's transom mounted to the cat. Big powerboat barging past laying out a HUGE wakes!
Seems to me the engine of choice would be a extra long shaft high thrust 4 stroke
9.9hp Yamaha. Good grunt at low speeds, fuel
efficient, reliable, readily available second hand (check the PDQ
forum for a used one or two) and the extra long shaft should keep both the prop in the water and powerhead from ingesting water.
Thoughtful attention to mounting the motor
securely and the addition of standard throttle and shift controls and all you need is a little luck to get to NC. Some small outboards even have a 12V battery charging
circuit albeit it will be modest modest at 8 amps or less.
Starting, stopping and slow speed manoeuvring will present significant challenges with just one engine when mounted far off center. When starting out it's likely the boat will turn 60 or more degrees before making useful forward movement and only then begin responding to the helm
. Dealing with the bridges will be a pain.
Wishing you good luck with your delivery