Posts: 3508
Location: Elk River, Minnesota | This is very interesting!!
See...here the curiosity in me working. I have recently purchased a yamaha 2 stroke 90 hp (inline 3 cyl) with 69.6 cid. I purchased this based on it's compact design, price, and reliability with which I am extremely happy with. I did notice, though, that the Johnson 2 stroke 90 hp has a 60 degree v-4 with 105 cid. Given that I will rarely load my boat down, the extra weight of the V4 just did not fit the bill...and if a smaller motor can create that much power to me seems like a good sell (power to weight and design). But...how is it that yamaha can create so much power with that inline with such significantly smaller cid than the comparable johnson in a v4? I know the extra cid will get me out of the water faster, but would it be safe to assume that the compression ratio in the yamaha is higher, thus creating the power that would be equivalent to the johnson?
Steve
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