Originally Posted by Cat36Mahalo
Yup. Not galvanized.
Commonly called "black iron or steam pipe"-the least expensive form of steel
Works fine for 3+ yrs.
If you want longer service(10+ yrs),go with SS equivalent size pipe.
material cost is (estimated) $30-$50 black iron/steam or $80-$120 stainless
plus the "asbestos" (equivalant) lagging.
I can see it being an 8 hr +/- job
You have a "partial hot/dry & water
cooled exhaust"-common in days gone by. & perfectly safe if the appropriate precautions are taken.
Obviously,if your boat
has had no problems related to this exhaust
setup,over it's lifetime-one cannot say it is "wrong".
My personal experience & humble opinions-feel free to ignore both
Remember-If all else fails, Google is your friend.