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15 Yammy Weird Noise
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<blockquote data-quote="joshua27" data-source="post: 391672" data-attributes="member: 17642"><p>I would check it with the cowl off to make sure there isn't any fuel leaks. A fuel suction leak will cause a whining noise as air enters the fuel system. Your mechanic replaced fuel lines and the best place to start troubleshooting a problem is the last thing someone touched. </p><p></p><p>I highly doubt it's the lower unit unless a bearing is going bad. I suppose it would be possible to tighten the prop nut too much and the prop could be binding against the lower unit housing but that's a stretch at best</p></blockquote><p></p>
[QUOTE="joshua27, post: 391672, member: 17642"] I would check it with the cowl off to make sure there isn't any fuel leaks. A fuel suction leak will cause a whining noise as air enters the fuel system. Your mechanic replaced fuel lines and the best place to start troubleshooting a problem is the last thing someone touched. I highly doubt it's the lower unit unless a bearing is going bad. I suppose it would be possible to tighten the prop nut too much and the prop could be binding against the lower unit housing but that's a stretch at best [/QUOTE]
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