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+--- Thread: Exhaust Noise (/showthread.php?tid=9017)
Exhaust Noise - duchess - 11-07-2024
All,
Older 31' Open with 454s with excessive exhaust noise > 2500 RPM.
Noticed it quiets down while making a turn to port while @ cruise.
The exhaust exits the sides instead of the stern and wonder if maybe it's the s/board muffler.
Any thoughts would be appreciated.
RE: Exhaust Noise - jclark003 - 11-07-2024
Reduced raw water flow can increase exhaust noise. Possible you have a restriction in the riser or heat exchanger. Or an impeller that isn’t moving enough water. Unfortunately it’s hard to tell how much water is moving visually.
RE: Exhaust Noise - duchess - 11-08-2024
Thank you for your response, however the Sherwood raw pumps are new, in 2022, and both engines run 150 degrees so I don't think that's it.