Need Source for Manifold replacement for standard 8.1 Horizon engines

[Pilot]

Does anyone know of a good reasonably priced source for cast iron manifolds? This will be my second time replacing them as its now been a full 7 years in brackish water and Im likely on borrowed time. Luckily the risers are stainless, so don't need those.

Much appreciated!
Pilot

 

[KevinC]

Go OEM merc and get the kit that has the hoses, drains and sensors.

Are you saying this is the second time in 7 years to replace? My last set was replaced after 6 years and still looked ok.

You should also keep in mind the elbows can develop weld cracks even though they are stainless. Verify they are not dripping back.

-Kevin

 

[jmauld]

This is the kit that I used on my 8.1l Engines
https://www.partsvu.com/manifold-exh-conv-866178a02.html
https://www.mercruiserparts.com/866178a02-manifold-exh-conv

 

[Pilot]

This is the kit that I used on my 8.1l Engines
https://www.partsvu.com/manifold-exh-conv-866178a02.html
https://www.mercruiserparts.com/866178a02-manifold-exh-conv

Thanks guys:

Yeah, I agree OEM is the way to go and I will use the link you attached to buy them. I changed them out once 7 years ago after they were on year 8. It's a hard check to write again! Thanks!

 

[jmauld]

Thanks guys:

Yeah, I agree OEM is the way to go and I will use the link you attached to buy them. I changed them out once 7 years ago after they were on year 8. It's a hard check to write again! Thanks!

I'm not condoning you do this, but mine made it 11 years of saltwater use , and there were no indications of leaks when I swapped them. The boat does have an integrated salt away system, but I'm not sure that was ever really used.

I plan on going 7-8 years on the new manifolds.

 

[Pilot]

I'm not condoning you do this, but mine made it 11 years of saltwater use , and there were no indications of leaks when I swapped them. The boat does have an integrated salt away system, but I'm not sure that was ever really used.

I plan on going 7-8 years on the new manifolds.

Thanks Jmauld, yes, I have heard of folks getting more but,,, I was talking to my mechanic who has specialized on Searays for years and he said normally the 8 year mark is all you get. We are in brackish water. Just better safe than sorry.