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PT Boat Forum
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PT Boats of WWII
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PT Boats - General
Post a reply to: ELCO Exhaust System
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[StartQuote] Bill, I posted a reply but it never appeared here for somr reason. The butterflies on the exhaust stacks channeled the exhause and most of the noise into the sea where it was barely noticible. You could use the mufflers when the engines were idling only, such as out of gear or at very low speed. If you tried to accelerate with the butterflies closed, it would blow them off the pipes. I had that happen twice when we encountered unexpected gunfire and the Skipper said "Get the H out of here". Although the butterflies were easy to replace, the Motor Macs didn't seem to like it when I fouled up. People who climbed aboard from the stern often used the butterflies for hand holds and screwed up their operation. We always checked them before any patrol because they were so important. [EndQuote]
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