Re: difference between 33 and 35HP OMCs?

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October 14, 2015 at 6:32 pm #25536
garry-in-michigan
Participant

    I believe it was a reduction in compression ratio to make it easier to crank and give it a smoother idle. It allowed them to eliminate the starter compression relief valve in the head and evened out the horse power range (20 to 33 to 40) . . . 😉