Recent content by bennettrp

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    Yamaha HPDI - 150 vs 300hp

    Hi, I've got the 150hpdi. When I look at specs, there doesn't seem to be any diff btw the 150 and 200. If I recall correctly displacement and comp ratio are the same. Which makes me wonder if the diff is in the tuning. Does anybody know? thx Dickd:)
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