Aquacraft one-piece machined motor water jacket w/fittings 36mm, mc. $7.25 $6.99. proboat control horn: outboard, stlo (discontinued). Find great deals on ebay for rc boat and radio controlled boat. shop with confidence.. Electric motors are a great way to power a model boat. especially if you need a boat that is both quiet and super portable. to extend the life of any electric motor.