HP 1.20 twin
I recently bought a very nice used one. Have rotated one cylinder so exhaust is on each side now. Have marine headers ordered and already have Mac tuned pipes for it. Plan to put cool clamps on it and with 15% nitro put it in a cat or rigger for a FUN boat!! Mine is ringed and I have found the workmanship to be very good in this engine. This is supposed be a high torque engine and at 4+horsepower should make some things happen!!!!
Curt