Join Date: Jan 2003
Location: Maine Coast
Thanked 287 Times in 220 Posts
Rep Power: 17
The reason for it
The reason it is intended to face aft on sailboats is so not to flood the engine by forcing water through the raw water intake. With a low enough anti-siphon loop and a good turn of speed down a wave it is entirely possible to "scoop" enough water to force it up over the anti-siphon and begin filling the wet exhaust.
I am very surprised your boat yard would 1) install it this way and 2) after messing up still insist it was correct..?
Hardly seems worth the $82.00 per hour.. Personally I am a non-believer in external grates and much prefer a 1" or larger intake that can be snaked from inside the boat if necessary..
-Maine Sail / CS-36T
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