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Prop Rattle #5686 10/04/06 09:39 PM 10/04/06 09:39 PM
Joined: Jun 2007 Posts: 16 NAS Patuxent River SCWard OP Member
SCWard OP Member Joined: Jun 2007 Posts: 16 NAS Patuxent River	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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Re: Prop Rattle #5687 10/04/06 10:02 PM 10/04/06 10:02 PM
Joined: Apr 2003 Posts: 649 Marblehead, MA dbows Senior Member
dbows Senior Member Joined: Apr 2003 Posts: 649 Marblehead, MA	When was the last time you had the prop re-conditioned? David #397 David Bows Mallorca - Hull# 397 ~~~~~_/)~_/)~~~~_/)~~~~~~~~~~~~~~~~~~~~~~~~~\|~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\|~~~~~

Re: Prop Rattle #5688 10/04/06 11:04 PM 10/04/06 11:04 PM
Joined: Jun 2007 Posts: 16 NAS Patuxent River SCWard OP Member
SCWard OP Member Joined: Jun 2007 Posts: 16 NAS Patuxent River	Not sure, but it produces good thrust and doesn't feel too loose but that is an uneducated assumption...

Re: Prop Rattle #5689 10/05/06 10:29 AM 10/05/06 10:29 AM
Joined: Apr 2007 Posts: 493 Chicago, Il. USA D. Bartley Governor at Large
D. Bartley Governor at Large Joined: Apr 2007 Posts: 493 Chicago, Il. USA	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

Re: Prop Rattle #5690 10/05/06 12:00 PM 10/05/06 12:00 PM
Joined: May 2007 Posts: 2,669 Portsmouth, RI Rhapsody #348 Past J/30 Class President
Rhapsody #348 Past J/30 Class President Joined: May 2007 Posts: 2,669 Portsmouth, RI	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. Bill Kneller Past Owner - Rhapsody J/30 #348 Projects & Documentation Core Replacement & Maintenance Blog Vento Solare J/109 #266

Re: Prop Rattle #5691 10/05/06 02:17 PM 10/05/06 02:17 PM
Joined: Apr 2003 Posts: 649 Marblehead, MA dbows Senior Member
dbows Senior Member Joined: Apr 2003 Posts: 649 Marblehead, MA	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 ~~~~~_/)~_/)~~~~_/)~~~~~~~~~~~~~~~~~~~~~~~~~\|~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\|~~~~~

Re: Prop Rattle #5692 10/05/06 04:39 PM 10/05/06 04:39 PM
Joined: Jul 2006 Posts: 27 NJ J Jim More Senior Member
Jim More Senior Member J Joined: Jul 2006 Posts: 27 NJ	Did you check the cutlass bearing and/or shaft wear at the cutlass bearing?

Re: Prop Rattle #5693 10/05/06 07:42 PM 10/05/06 07:42 PM
Joined: Jun 2007 Posts: 16 NAS Patuxent River SCWard OP Member
SCWard OP Member Joined: Jun 2007 Posts: 16 NAS Patuxent River	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..!

Re: Prop Rattle #5694 10/29/06 12:34 AM 10/29/06 12:34 AM
Joined: Mar 2005 Posts: 111 Bellevue, WA, USA R R II Senior Member
R II Senior Member R Joined: Mar 2005 Posts: 111 Bellevue, WA, USA	I would bet your problem is the clutch slipping. Acutally it is the 'drive cone' that wears and needs replacing. Check out the following forum discussion... http://j30.us/ubbthreads/ubbthreads.php/topics/5230/Prop_Vibration_Slipping_Clutch.html#Post5230 AC

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