I am having trouble finding a good 4" exhaust hose to run on my cruiser boat. The engine is a mostly stock 350 sbc with omc log manifolds on it 4" outlet to 4" tips, only about an 18" run from the manifold to tip. I keep burning holes in the top side of the exhaust hose, i am not sure why it keeps doing this but there seems to be plenty of water running out of the tips even at an idle and it doesn't feel all that hot when it is running, i mean you can touch it for a few seconds and it wont burn you. Hose that is currently burnt up on the boat now is mpi exhaust hose. I even put an 8" piece of 4" exhaust pipe inside the hose and clamped it in and it still burnt out the small areas where hose was exposed to the exhaust gas. I have looked for a different type of hose and found some trident marine silicone soft wall exhaust hose but i cant seem to find a dealer with the hose in stock. Anybody have any ideas?
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