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General Discussion Forum


low rpm clatering noise

Anonymous user

17 July 2006 17:54:58

Joined: Unknown | Posts: Unknown

I have a 1992 boat that has a 454 mercruiser with 480 hours. At idle speed I hear a clattering noise at the rear of the engine. The best way I can desribe it is a small wrench inside the exhaust system is where it sounds to be coming from. Just wondering if this is a serious problem and could it cause me trouble. The boat runs fine other than that noise. At running speed the clattering is either stopped or drowned out... any advice.
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Re: low rpm clatering noise

Anonymous user

18 April 2007 10:11:58

Joined: Unknown | Posts: Unknown

well first check if theres a small spanner in the exhaust and then check the actual exhausts sometimes the rubbers that hold the exhaust in place wear away after about 500 hours on average. sometimes a bit of a job but could cause wrong back pressures and poisonous gasses coming in.

mike
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