Join Date: Aug 2011
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Universal M-25 Exhaust port underwater?
The exhaust port of our M-18 on our 1984 Catalina 27 is setup similarly. Our boat also squats under power. The only downside so far is that the exhaust mixes with the swirling water and leaves some residue on the transom. I've read that large following sees can cause issues by forcing water into the exhaust which can be alleviated by a flap on the exhaust port opening and/or a anti siphon loop