Back in the mid 70's Joe M stacked 2 350cc Yamato piston port motors on top of each other. Saw the complete package at Kaukana Kilo's. The main issue with the motor was the coupling between the two powerheads. Joe couldn't keep it together. Bruce Summers was the rope man at the Kilo's. I took a lot of pull to crank it thru. Fired 4 cylinders at a time. If I remember correctly, Joe went out testing once with the coupling in tact. The coupling came apart, and no one realized it. Bruce must have roped that thing 50 times before someone realized that the prop wasn't turning.
Dan
Dan
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