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Old 05-12-2013, 08:22 PM
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JerryW JerryW is offline
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Join Date: Jul 2004
Boat: 2002 X-9; LQ9
Location: Southeast
Posts: 88
I know that for the Silent Master mufflers on our 2002 X-9, inside the muffler were a number of half round fiberglass baffles, some of which had come loose, probably due to overheating. The sound you're hearing could possibly be a loose baffle being knocked around by the exhaust and water pulses as the engine is running.
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