"Stainless Steel", (whatever that means) used in combination with saltwater and elevated operating temperatures is never a good combination.
Especially if they're coupled to cast iron manifolds.."Stainless Steel", (whatever that means) used in combination with saltwater and elevated operating temperatures is never a good combination.
Marine Stainless Steel Applications | Total Materia
Explore the performance of stainless steel in marine environments, including issues with crevice corrosion, pitting, stress corrosion cracking, and galvanic corrosion. Learn how cathodic protection can prevent these problems and improve the longevity of marine applications.www.totalmateria.com
Why not????
I may be wrong, but I think the galvanic difference would accelerate corrosion of the cast iron...May not be enough to matter considering the normal life span of either part..
Mine motors are anti-freeze cooled except sea water going through heat exchanger and risers. To me the Cast Iron risers are the weakest link. I was going to replace my CI risers with stainless steel but now I am not sure. I don't see a lot advertised and when I do they average about 2x as much as CI.
I have a 90 V6 4.3 so it seems like it may work. Any input on flange style (short bolt) vs a normal elbow long bolt? I would think the gasket would stop corrosion between the elbow and Cast iron manifold with the 2 different metals.
However, the bolts bind them together. I have used SS bolts all over my MC saltwater used boats for years and never had any problems, that I could identify. However, since there is not a lot of SS risers being sold, the water passing through them may produce exceedingly more corrosion. I always thought it was just $$ that convinced MC not to use SS.
