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Stainless Marine exhaust
- Thread starter Tony
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CausinTrouble
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Who sells the exhaust/riser gaskets ?
smittyseng
Charter Member
I was scared of them too so I converted to stainless elbows,they also came from stainless marine. It was funny though,they didn't have many in stock (not enough to convert all of them at once). So it must not be a popular option,Smitty
Tony
Founding Member
You could probably make them easy enough. FYI the clamps can be found at any commercial truck parts counter. I switched the fittings out to SS just to be on the safe side.
CPPerformance
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We have them on the shelf. Feel free to give us a call!
http://www.cpperformance.com/SearchResult.aspx?CategoryID=313&Manufacturer=90
CausinTrouble
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I saw you guys had them..
CausinTrouble
New member
Make them out of regular gasket material ?
Geronimo36
Charter Member
Over the years I've made them out of high-temp gasket material and sealed with Red RTV. No problems to speak of. Lay the gasket paper over top of the hole and rub the handle of a screwdriver over top to make marks on the paper and then cut it out with an razor blade or carpet cutter...takes 5 minutes!
Although, I found the SM gaskets can be re-used a few times with RTV. The gasket paper needs to be made new every time.
As far as the fittings, they switched due to the potential of long-term corrosion with dissimilar metals.
Last edited:
Geronimo36
Charter Member
Is your site down?? I tried getting on this morning but it says page not found for both the link provided and the main page.
The riser gaskets are available direct from Brownie at SM. Mine came with bronze fitings in there and I have not messed with them. I suppose the dissimilar metal deal will eventually bite me. I did have a problem with erosion around the exhaust ports and had them welded and resurfaced. I would recommend using the stock riser gaskets as they are exhaust gasket material and do have quite a bit of heat to deal with.
Geronimo36
Charter Member
Here's info on the plastic fittings and why they use them... It's good info for the fresh-water boaters and those of us who regularly flush..
"Another lesson that we learned the hard way has to do with corrosion. We have very few failures during the warranty period. When a manifold fails, we replace it and cut the old one open for a post-mortem. One thing that confused us was the fact that some of the best cared for, best looking manifolds had the most severe damage. I went to a seminar at the IBEX show in Ft. Lauderdale a couple of years ago, conducted by Ward Eshelman, who is the guru of electrolytic corrosion. After the seminar, I stayed and spoke to Ward about our situation. He explained the following: Standard equipment at that time was sacrificial anode (zinc) for each manifold. A manifold sitting full of salt water with a zinc to protect is a happy situation. If you are a careful owner, or a fresh water boater, or both, and flush the engine after every use, the manifold now sits full of fresh water. The zinc changes its name from anode to cathode, and now the manifold is protecting the zinc! We deleted the zinc and changed the water fittings from hard anodized aluminum to a space age fiberglass reinforced plastic. There is a fair chance that the current Stainless Marine manifolds could outlive your boat!"
"Another lesson that we learned the hard way has to do with corrosion. We have very few failures during the warranty period. When a manifold fails, we replace it and cut the old one open for a post-mortem. One thing that confused us was the fact that some of the best cared for, best looking manifolds had the most severe damage. I went to a seminar at the IBEX show in Ft. Lauderdale a couple of years ago, conducted by Ward Eshelman, who is the guru of electrolytic corrosion. After the seminar, I stayed and spoke to Ward about our situation. He explained the following: Standard equipment at that time was sacrificial anode (zinc) for each manifold. A manifold sitting full of salt water with a zinc to protect is a happy situation. If you are a careful owner, or a fresh water boater, or both, and flush the engine after every use, the manifold now sits full of fresh water. The zinc changes its name from anode to cathode, and now the manifold is protecting the zinc! We deleted the zinc and changed the water fittings from hard anodized aluminum to a space age fiberglass reinforced plastic. There is a fair chance that the current Stainless Marine manifolds could outlive your boat!"
VetteLT193
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