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General Jet Boat Discussions
a new jet ski jet boat project
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<blockquote data-quote="PSG-1" data-source="post: 247293" data-attributes="member: 6937"><p>Good idea for putting the spacer/sleeve in the tubing, to keep the engine weight from collapsing it. I would have suggested a strip of 1/4" X 3" aluminum plate on top of the tubing, but the spacers will also work. Even on flat water, without the factor of hull chop, engine vibration is a serious factor to contend with. When you've got that much weight vibrating around, it's gotta be secure, especially at lower RPM's, where vibration is really pronounced. </p><p></p><p> Certain types of motor mounts are better at isolating and dampening vibration than others. The Sea Doo 717 mounts do transfer a lot of vibration. I can remember my Sea Doo 14' Speedster with twin 717's, it had a lot of vibration, even in a fiberglass hull.</p></blockquote><p></p>
[QUOTE="PSG-1, post: 247293, member: 6937"] Good idea for putting the spacer/sleeve in the tubing, to keep the engine weight from collapsing it. I would have suggested a strip of 1/4" X 3" aluminum plate on top of the tubing, but the spacers will also work. Even on flat water, without the factor of hull chop, engine vibration is a serious factor to contend with. When you've got that much weight vibrating around, it's gotta be secure, especially at lower RPM's, where vibration is really pronounced. Certain types of motor mounts are better at isolating and dampening vibration than others. The Sea Doo 717 mounts do transfer a lot of vibration. I can remember my Sea Doo 14' Speedster with twin 717's, it had a lot of vibration, even in a fiberglass hull. [/QUOTE]
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a new jet ski jet boat project
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