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Old 04-09-2007 | 07:57 PM
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NM2K
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From: Ringgold, GA
Default RE: 2 STROKE TO 4 STROKE CONVERSION


ORIGINAL: daveopam

I don't know a rule of thumb. However a Saito 72 or 82 will be just right.

David

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I'm with you, David. The .82 would be perfect in my book. The .72 is a bit too light in the power department for me. You're carrying nearly the same weight and size in a .72 as you are with the .82. You may as well enjoy the larger engine. I'm surprised that Saito is still making the .72.

To a previous gentleman; You don't have to run large diameter props on four-strokes. You do need to run enough load on the engine to put it in its desired rpm range. There is nothing wrong with running an 11x10 or 11 on an .82 instead of a 14 or 15 something or other. Yes, prop efficiency goes to hell in a hand basket, just like it does on a .61 two-stroke running the same prop. But sometimes it is the best that one can do under a particular set of circumstances.


Ed Cregger