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Old 02-07-2021, 08:53 AM   #1
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Ringing noise from gear

I have a ringing noise coming from the port engine running gear between 1200-1500 rpm.
Noise goes away over 1500 rpm
Is this possible cutlass bearing issue or maybe my Spurs rubbing and riinging.
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Old 02-07-2021, 08:58 AM   #2
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Could be either of those, the transmission, or the prop itself can sometimes make that noise oddly enough. Have you been able to rule out the engine or transmission?
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Old 02-07-2021, 09:01 AM   #3
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No noise from engine when out of gear at those rpms.
Don’t know how to eliminate transmission from running gear.
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Old 02-07-2021, 09:02 AM   #4
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How are your shaft grounded?
Could be the noise generated by the grounding strap on riding on the shaft.
I say that based upon my own experience.
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Old 02-07-2021, 09:05 AM   #5
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Grounding contact is there riding on the shaft.
Did not think of that.
I could pull it off and run to see thanks.
Won’t be till spring but I will try that
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Old 02-07-2021, 09:55 AM   #6
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Mechanics stethoscope? I keep one onboard for just such a occasion.
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Old 02-07-2021, 10:29 AM   #7
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Dry stuffing box.
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