mercruiser alpha rattle

[record hunter]

Was helping a friend put his outdrive back on today. It is a merc alpha IO .It is probably a late 70,s.Here is the noise .There was a rattle coming out by the small exhaust hole that lets exhaust water out. He said it has always been there. After we shut the engine off I looked up the hole and noticed what looked like a washer that was ratteling. Looked up other hole and it looks like maybe there is a rubber spacer or washer that is attached though this one was just laying up there loose. I know someone on this forum will know what it is and if it could cause a problem for him.Thanks love you guys

 

[Bondo]

Re: mercruiser alpha rattle

It Sounds like the Exhaust Shutter...... <br />You'll have to Fish it out from the top of the downpipe.....

 

[djvan]

Re: mercruiser alpha rattle

Right on Bondo

 

[record hunter]

Re: mercruiser alpha rattle

What part of the shutter would the washer be from Do you think that he no longer has a shutter. I know on my pre alpha my shutter is way down on the bottom have to take motor out to change . Is a alpha outdrive the same he has 4 cyl motors probably not

 

[Bondo]

Re: mercruiser alpha rattle

"What part of the shutter would the washer be from?"<br />The Grommet that holds things in place ??????<br />"Do you think that he no longer has a shutter ?"<br />Ya, He's Still got it... Just Not where it Belongs.......<br />I Think , on the Alpha1s it's mounted at the top of the Downpipe... Just under the big rubber coupler pipe....

 

[JasonB]

Re: mercruiser alpha rattle

The shutters in my '76 with a Ford V8 are in th base of the exhaust pipe. The engine had to be out to get to them. Hope yours is easier to get to.

 

[crazy charlie]

Re: mercruiser alpha rattle

Bondo is correct,thats exactly where the flapper is.I have replaced them before and dont recall a washer.The flapper has a rubber coat on it that may have come off,this may be what you see.The flapper itself would make the noise you are describing.Charlie