How often do you replace manifolds and risers?

Good article. Kinda puts it all into perspective.
 
I just received word that Merc is paying for 4 new exhaust manifolds for my boat. They were aluminum. The new ones will be cast (presumably with ceramic coating). They are also paying for changing hoses/fittings which are different, and all of the labor.

THANK YOU MERCRUISER!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

THANK YOU Treasure Island Marina, Panama City Beach, Fl!!!!!!!!!!!!!!!!!!!!!!!!
 
Hampton said:
I just received word that Merc is paying for 4 new exhaust manifolds for my boat. They were aluminum. The new ones will be cast (presumably with ceramic coating). They are also paying for changing hoses/fittings which are different, and all of the labor.

THANK YOU MERCRUISER!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

THANK YOU Treasure Island Marina, Panama City Beach, Fl!!!!!!!!!!!!!!!!!!!!!!!!
Click to expand...

Hampton,
First, why are they replacing your manifolds? Second, yes your new ones will no doubt be ceramic. The new ones I just had put in were ceramic. I think that's all Mercruiser makes now. Also they have switched casting methods from Green Sand casting to Lost Foam casting. That's a trivia answer for a question nobody will ever ask you.
 
Thats true although lost foam isn't neccessarily better it's a much neater looking and easier process to cast the iron. More uniform inside walls to. Eventually all manifolds co. will be switching to lost foam casting most likely
 
Chaz - I had the aluminum ones on the 8.1's. They are good for about 3 - 4 years in salt water. I had them pulled before one sprung a leak and took out a motor (just happened to my buddy on his '04 390).
 
Chaz......you might want to review this thread in case you missed it:

http://www.clubsearay.com/forum/showthread.php?t=6038&highlight=heads+up


I should also add that this is a good example of the value of CSR to Sea Ray owners. John listened, he checked his boat for the potential and found that he was affected. He reacted and very likely saved at least one if not both engines. It also emphasises the importance of having a good working relationship with your local dealer. The service manager went to bat for John with Mercruiser and got his repair fully covered even though the boat was not purchased at that dealership.

John.........I'm glad you can smile about this one!
 
Last edited:
Frank,

I just went to your post with the link above and re-read it. I missed it before, but you are right. The risers are SS. Thank goodness for that! My 250 had SS risers and after 10 years in the salt, my mechanic concluded that they would never need to be replaced. That boat was kept on a trailer, though.
 
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