So I've got a set of 502 EFI's that are completely stock, and I currently plan to keep them that way.
Well, the last time out, I noticed a little more steam out of the starboard motor than the other so I decided to pull the risers/manifolds apart. My suspicions were correct as the mating surface on one of the risers was rusted pretty bad, and won't provide a good seal even with a new gasket.
The port side looks good, and cleaned up fairly well, so they are re-usable.
Now, the question...I found a set of used Imco Thumper manifiolds and risers for what seems like a good price, and these are cast aluminum, so I should have quite the issues as I do with the cast iron.
I do boat in the salt, however, now that I own the boat it will be flushed after every salt use.
Should I replace everything with the used Imco's? Buy new risers for the stock? I can get a set of stainless risers for the stock manifolds... Keep the stock arrangement and save for a better aftermarket option????
Again, these motors will stay stock for years to come...