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Yamaha vs Suzuki 9.9 tiller
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<blockquote data-quote="DerHornen" data-source="post: 230276" data-attributes="member: 672"><p>So I am a mechanical engineer but I don't specialize in small engines or accoustics. That said, I think the thing with kicker motor noise is that they are very small displacement engines that only have two cylinders. There are vibration and harmonic balance issues with only two cylinders, and they're set up in small packages that don't allow for much sound damping. Couple that with the fact that a kicker has to run at relatively high RPM to move at any modest speed and they can't be all that much quieter than they are. Still, my Suzuki EFI, with all its benefits, is definitely not as quiet as the carbed Yamaha and Mercury (Tohatsu) motors. I still like the easy starting, especially in a big motor won't fire scenario, but it would be nice if it idled as smooth and quiet as the yammi.</p></blockquote><p></p>
[QUOTE="DerHornen, post: 230276, member: 672"] So I am a mechanical engineer but I don't specialize in small engines or accoustics. That said, I think the thing with kicker motor noise is that they are very small displacement engines that only have two cylinders. There are vibration and harmonic balance issues with only two cylinders, and they're set up in small packages that don't allow for much sound damping. Couple that with the fact that a kicker has to run at relatively high RPM to move at any modest speed and they can't be all that much quieter than they are. Still, my Suzuki EFI, with all its benefits, is definitely not as quiet as the carbed Yamaha and Mercury (Tohatsu) motors. I still like the easy starting, especially in a big motor won't fire scenario, but it would be nice if it idled as smooth and quiet as the yammi. [/QUOTE]
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