Join Date: Oct 2007
Location: Beacon Falls CT USA
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Exhaust system replacement using mostly Trident?
My 1972 NorthStar (Hughes) 38 has a Universal M4-30, 25hp diesel engine that's fitted with a raw-water-fed water-jacketed exhaust tube that's about 2 1/2 feet long - an inner pipe of exhaust gas surrounded by a sealed tube where raw water flows.
The flanged end of this unit is fastened to a dry, glass-matt-wrapped black-iron exhaust pipe/system that exits the boat about 15 feet away - a home-depot parts, custom pipe-fitted frankenstein of a set-up installed by the PO.
The raw water used in the jacket above rejoins the exhaust pipe about 2 feet from the end of the black-iron exhaust pipe and flushes out through a seacock.
The glass-wrapped black iron fails about every 10 years. Cost of a custom fab'd SS exhaust is staggering. Can I use Trident exhaust-rated hose on this application or is it too hot (even though exhaust is cooled via the 2-foot double-pipe back at the engine)?
Any other ideas on how to solve this perrenial failure item?