FO RWARD
The Yamato model 302 is a 396cc / 24. 2 cubic inch stock racing engine. Like it's
predecessors - the models 80, 102 and 202 - this motor was developed specifically
for use in the multi-billion Yen parimutuel boat racing industry in Japan. These
motors are required to run heats, day after day with perfect reliability at racing
speeds. Therefore, like engines in commercial aircraft, they have been “over-
designed” in relation to the job they perform.
Essentially, this 33 h.p. engine is a strong twin which has been detuned by use of a
low compression head, mild-port timing and one small carburettor. When putting out
33 h.p. at 6,600 rpm the 302 is just Ioafing. No wonder the Yamato has become the
biggest and most popular class in UIM and APBA racing. Compared with other stock
powerheads which vibrate, crack and fail at racing speed these engines are made
virtually "Bullet Proof". Ask any racer that owns a model 80, 102 or 202. You too will
be convinced that the model 302 is the best buy today on the motorboat racing
scene.
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