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Converting 1986 Merc 9.9 2-stroke to 15HP?
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<blockquote data-quote="zuren" data-source="post: 483906" data-attributes="member: 22314"><p>Has anyone converted a late 1980s 9.9 Merc 2-stroke to 15HP? I've read of guys doing this and from what I understand is that the 9.9 and 15HP engine are the same with the exception of a different carb, or different carb AND exhaust tube (still trying to clarify what I need). I would not mind some extra horsepower. The lakes around me are either no restrictions, or electric only, so a 9.9 motor really is not benefiting me. The boat is rated for 25HP.</p><p></p><p>I'm weighing the cost and complexity of converting what I already own, VS. finding a 15HP 2-stroke, VS. one of the lightweight 4-strokes (Tohatsu - 94 lbs, Mercury - 99 lbs.). My 9.9 is 70 lbs., so even a 94 lb. Tohatsu may be too much.</p><p></p><p>So I'm just wondering if anyone has done it? Was it worth it? Would you do it again?</p><p></p><p>Thanks!</p></blockquote><p></p>
[QUOTE="zuren, post: 483906, member: 22314"] Has anyone converted a late 1980s 9.9 Merc 2-stroke to 15HP? I've read of guys doing this and from what I understand is that the 9.9 and 15HP engine are the same with the exception of a different carb, or different carb AND exhaust tube (still trying to clarify what I need). I would not mind some extra horsepower. The lakes around me are either no restrictions, or electric only, so a 9.9 motor really is not benefiting me. The boat is rated for 25HP. I'm weighing the cost and complexity of converting what I already own, VS. finding a 15HP 2-stroke, VS. one of the lightweight 4-strokes (Tohatsu - 94 lbs, Mercury - 99 lbs.). My 9.9 is 70 lbs., so even a 94 lb. Tohatsu may be too much. So I'm just wondering if anyone has done it? Was it worth it? Would you do it again? Thanks! [/QUOTE]
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Converting 1986 Merc 9.9 2-stroke to 15HP?
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