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General Jet Boat Discussions
Mercury 60/40 4 stroke
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<blockquote data-quote="1darknight" data-source="post: 309810" data-attributes="member: 10659"><p>Well I got bass pro to return the idle to 750 rpm's today. Then I called Troutt and Sons in St J <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite9" alt=":eek:" title="Eek! :eek:" loading="lazy" data-shortname=":eek:" /> ames MO. They carefully explained to me that Mercury uses a stainless impeller and what I hear at idle 750 to 950 rpm is a harmonic rattle and actually the impeller is rubbing the liner during that time a little causing the resonation sound.. They said with only 3 hours on the motor just run it and by 10 hours or more it will quiet up some and to just get the rattle out of my head and do not let it haunt me. He said no need to bring it to him as its a 600 mile trip. He said even a brand new Merc 60/40 will do it at idle. So I appreciate his explination and can or will live with it. My previous Yamaha's were very quiet but they all had aluminum impellers. So case closed for me for now.</p><p>Thanks for your inputs and Troutt and Sons knows their stuff.</p><p>Bill</p></blockquote><p></p>
[QUOTE="1darknight, post: 309810, member: 10659"] Well I got bass pro to return the idle to 750 rpm's today. Then I called Troutt and Sons in St J :o ames MO. They carefully explained to me that Mercury uses a stainless impeller and what I hear at idle 750 to 950 rpm is a harmonic rattle and actually the impeller is rubbing the liner during that time a little causing the resonation sound.. They said with only 3 hours on the motor just run it and by 10 hours or more it will quiet up some and to just get the rattle out of my head and do not let it haunt me. He said no need to bring it to him as its a 600 mile trip. He said even a brand new Merc 60/40 will do it at idle. So I appreciate his explination and can or will live with it. My previous Yamaha's were very quiet but they all had aluminum impellers. So case closed for me for now. Thanks for your inputs and Troutt and Sons knows their stuff. Bill [/QUOTE]
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Mercury 60/40 4 stroke
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