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Forums28
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May 14th, 2026
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Joined: Jun 2007
Posts: 16
Member
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Member
Joined: Jun 2007
Posts: 16 |
Hello everyone-got a question regarding prop rattle. I just had my dripless seal changed out and shaft aligned ($2100-ouch)on Blitz(#122). The cutlass bearing had neen changed in 04. Prior to the changeout I had noticed a prop rattle/vibration at various RPM, but thought it to be fairly normal for age/lifecycle etc.. Now I am noticing it more; everything is working perfectly-good shifting/engaging, and lots of thrust in both forward and reverse just a really annoying high pitched rattle that definitely comes from the prop area. I dive the boat regularly and it is spotless below. Do I need to worry or take action or can I just live with it and press?
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Joined: Apr 2003
Posts: 649
Senior Member
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Senior Member
Joined: Apr 2003
Posts: 649 |
When was the last time you had the prop re-conditioned?
David
#397
David Bows
Mallorca - Hull# 397
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Joined: Jun 2007
Posts: 16
Member
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Member
Joined: Jun 2007
Posts: 16 |
Not sure, but it produces good thrust and doesn't feel too loose but that is an uneducated assumption...
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Joined: Apr 2007
Posts: 493
Governor at Large
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Governor at Large
Joined: Apr 2007
Posts: 493 |
Probably need to have the prop re-conditioned. If it's still a Martec, they do that for a reasonable fee.
Dennis Bartley
Planxty, s/n 23994
hull 205
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Joined: May 2007
Posts: 2,685 Likes: 1
Past J/30 Class President
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Past J/30 Class President
Joined: May 2007
Posts: 2,685 Likes: 1 |
Make sure it isn't the transmission slipping. I had that happen on Rhapsody. We thought it was the Martec prop, rebuilt it and same thing occured. Turned out the clutch was worn resulting in "chatter" on the shaft. We thought it was the prop sticking and not opening fully. A transmission rebuild where they changed the seating surface on the conical clutch face fixed the problem.
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Joined: Apr 2003
Posts: 649
Senior Member
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Senior Member
Joined: Apr 2003
Posts: 649 |
That is true about the tranny. The way to check the prop is the blades should be no closer than 3/8ths of an inch together at the tip when closed and there should be no sideways movement of the blades.
David
#397
David Bows
Mallorca - Hull# 397
~~~~~_/)~_/)~~~~_/)~~~~~~~~~~~~~~~~~~~~~~~~~|~~~~~~~
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Joined: Jul 2006
Posts: 27
Senior Member
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Senior Member
Joined: Jul 2006
Posts: 27 |
Did you check the cutlass bearing and/or shaft wear at the cutlass bearing?
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Joined: Jun 2007
Posts: 16
Member
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Member
Joined: Jun 2007
Posts: 16 |
Thanks everyone-yes, the cutlass bearing is brand new/noslop at all. I will check the prop-it looks like the Tranny/clutch is working fine...just rattling away down here in Pax River/Solomons..!
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