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Jet Boats
General Jet Boat Discussions
Going Back to 2 Stroke Jet!
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<blockquote data-quote="rotus623" data-source="post: 432171" data-attributes="member: 15266"><p>Larry,</p><p></p><p>The swap is easy. That being said, I know where a Yammie 90/65 jet is located, and the guy will ship it if you want. I will PM you the details.</p><p></p><p>That being said, a 4 cylinder OMC 90hp is 92 cu in!!! Thats a screamer! They go up a block size from 75hp -90 hp, unlike yamaha who uses the same displacement engine for their 60-70hp motors (52 cu in). The step up the the 75hp is where its at, the block is 70 cu in. Many of the Merc 70-90hps are 71-84 cu in blocks. Just depends on how much weight you want to carry, but those 3 cylinder Yammie 70hps are a little low on the displacement side for a 70...........</p></blockquote><p></p>
[QUOTE="rotus623, post: 432171, member: 15266"] Larry, The swap is easy. That being said, I know where a Yammie 90/65 jet is located, and the guy will ship it if you want. I will PM you the details. That being said, a 4 cylinder OMC 90hp is 92 cu in!!! Thats a screamer! They go up a block size from 75hp -90 hp, unlike yamaha who uses the same displacement engine for their 60-70hp motors (52 cu in). The step up the the 75hp is where its at, the block is 70 cu in. Many of the Merc 70-90hps are 71-84 cu in blocks. Just depends on how much weight you want to carry, but those 3 cylinder Yammie 70hps are a little low on the displacement side for a 70........... [/QUOTE]
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Going Back to 2 Stroke Jet!
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