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Old 07-11-2015, 03:53 PM
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megapea megapea is offline
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Manifold drain elbows

I had a crack in one of the original drain elbows on the back of the exhaust manifolds. I can't believe that Mastercraft made these out of plastic. With all the heat and cool down cycles, I guess I'm surprised the lasted as long as they did (1999 boat)! After a long search, I found replacements made of brass. Maybe the newer boats have the brass ones, but I think they all should!
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Old 07-11-2015, 03:55 PM
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megapea megapea is offline
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Here is the brass one.
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Old 07-11-2015, 04:36 PM
waterlogged882 waterlogged882 is offline
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Quote:
Originally Posted by megapea View Post
..........After a long search, I found replacements made of brass.
Those are readily available at Discount Inboard Marine (an FYI).
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Last edited by waterlogged882; 07-11-2015 at 04:52 PM.
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Old 07-11-2015, 05:40 PM
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Saw this on the bakes online indmar exhaust page'

"Indmar Nylon Exhaust Manifold Elbow Fitting. DO NOT replace this fitting with nothing other than nylon. Replacing these fittings with brass with cause the area around the fitting to act like a zinc because of the metallurgic difference. "

Keep us updated if you start to notice a "metallurgic difference".

I have the same issue they are leaking was going to go brass.
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Old 07-11-2015, 05:57 PM
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You can do regular plugs and inserts too from Ace Hardware...$15. I had to re-tap both sides this spring and re-do...1 beer job.

Our originals were metal and the rust started to eat the threads.
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Old 07-11-2015, 08:40 PM
Fullpass Fullpass is offline
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I had just went with stock...mine had no cracks, fixed a couple leaks that had been sealed with teflon tape, wouldn't recommend; however, researching brass and what not...best solution I had read was to replace with marine stainless steel, something like ss300, 301,302,303. I have aluminum exhaust manifolds. Aluminum was the weaker metal to brass, hence threads would rust out in the manifolds and what not. The plastic ones are doing the job of preventing corrosion, just not as pretty.
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Old 07-11-2015, 11:58 PM
jgraham37128 jgraham37128 is offline
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Sometimes things are designed to fail first and this looks to be the case so I would only replace with OEM.
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