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Twin 9.9 hp outboards for HP restricted lakes
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<blockquote data-quote="jethro" data-source="post: 395513" data-attributes="member: 12381"><p>At one point I owned both a 3hp Evinrude and a 3hp Merc. One day for fun decided to put both of them on my little 12' jon boat. Snugged them down so you could take your hands off either one and they would still run straight. So I started up one and got it running full throttle, made about 7mph. Fired up the other one and got it running full throttle, looked at the GPS and I was at 5.5mph. Took the other motor out of the water and jumped back up to 7mph. Either motor ran 7mph alone, but 5mph in tandem. I'm sure you guys can tell me why, but I reasoned that if both screws are turning about the same speed, you aren't going to get any more thrust but will see more drag? It was interesting. Do dual screw boats go faster or just have a better hole shot?</p></blockquote><p></p>
[QUOTE="jethro, post: 395513, member: 12381"] At one point I owned both a 3hp Evinrude and a 3hp Merc. One day for fun decided to put both of them on my little 12' jon boat. Snugged them down so you could take your hands off either one and they would still run straight. So I started up one and got it running full throttle, made about 7mph. Fired up the other one and got it running full throttle, looked at the GPS and I was at 5.5mph. Took the other motor out of the water and jumped back up to 7mph. Either motor ran 7mph alone, but 5mph in tandem. I'm sure you guys can tell me why, but I reasoned that if both screws are turning about the same speed, you aren't going to get any more thrust but will see more drag? It was interesting. Do dual screw boats go faster or just have a better hole shot? [/QUOTE]
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Twin 9.9 hp outboards for HP restricted lakes
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