Thanks for the reply. We found the paperwork on the warranty work. DeAngelo Marine Exhaust Inc made the replacement riser in 2000. However they don’t have the plan. If we send ours riser to them they can replicate it. We just re-welded all joints. Hopefully it will hold up!!
The original exhaust system in the 96 Mainship 350 / Caterpillar engine allowed water to back up into the exhaust system and damage the turbo system. I believe Mainship warrantied the problem and sent a new exhaust riser to be installed. Our Riser recently broke at the welded seam and appears...