Oh yes. We put new risers and manifolds both sides. The one that we installed on stbd side had two holes in it(new) sent it back and received another new one, installed and no issues
It seems the gaskets were ok. Water was coming from the a hole in the riser water jacket. Got a new riser and changed the oil two more time seems ok. Not sure if it will last but it’s working now
Well I found the problem. The block off gasket on the stbd side failed on the top where raw water enters the riser.
Seems like the permeates high heat optimum silicone gasket maker reacts with the rubber on the gasket.
It only failed on the raw water side not on the bottom (antifreeze...
I have a 2013 mercruiser 383 stroker and have changed the exhaust manifold and exhaust risers. Started engine with fresh water to check for leaks. All good from the outside launched the boat and ran about 40 minutes and found oil level 2 quarts over full. Antifreeze at normal level. Plumbing is...