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Old 04-24-2016, 11:23 AM   #15
Ski in NC
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City: Wilmington, NC
Country: USA
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 5,393
I've been on lots of boats with underwater exhaust. They can work, but not a big fan. Unless designed right, backpressure can be pretty high or even over spec. I prefer a good muffler and tailpipe above waterline. Nice to be able to see, at a quick glance, that you have good water flow and a clean burn.

The IPS really needs a relief line. Constantly blowing bubbles under the boat is annoying.
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