Mod Engine Kit for K&B 3.5cc Outboard Engines
10-15 mph Increase on Prather Spitfire I
Increase the speed of any boat designed for the K&B 3.5cc Outboard
The Mod Engine Kit will require some drilling, grinding and filing on teh engine.
No piston and sleeve modification is required. The kit includes an exhaust throttle, hi-performance needle valve assembly, pressure fitting and stainles steel rudder. Even a novice can modify his engine with the new Prather Mod Enginbe Kit.
Complete step by Step photo Instructions