Exhaust Flapper 3.0/181

[jackrg]

I have a 1984 mercruiser 181. It has all the<br />usual noises under the cover when running, but there is one that is not consistant. I was wondering would the exhaust flapper make more noise if the rubber/plastic end pieces were missing or partly warn away ?

 

[Northern Eclipse]

Re: Exhaust Flapper 3.0/181

If the rubber has burnt off, all that is left is metal, which will clank away in the y-pipe when motor is running at idle speeds.

 

[jackrg]

Re: Exhaust Flapper 3.0/181

Is this a simple repair ? What do you think a new flapper will cost ?

 

[Trent]

Re: Exhaust Flapper 3.0/181

Sounds to me you have normal "exhaust shutter" noise. The 3.0 shutter make noise at different times. Normally "shutters alot" around 3000 rpm. But if your worried about it take a look. Remove the rubber boot from the riser and look down the exhaust tube. Shutter is down just a little ways in their.<br /><br />Shutter list for $20.50 P/N 60930

 

[jackrg]

Re: Exhaust Flapper 3.0/181

Thanks for your input. It's an older boat and it's easy to get concerned/paranoid about intermittent noises.<br /> Thanks again,<br />Jackrg