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Rudder Slop

Posted By: rehmbo

Rudder Slop - 05/31/18 08:27 PM

Hi Guys -

Doing a little pre-season maintenance and remember last fall that I had a lot more rudder slop than I cared for. I've removed as much play as I can from the various linkage points, but I have one point of slop that I'm still deciding the best course of action to resolve. I have an older 2010 C2 and the issue is between the pintles and the castings/gudgeons (pics below).

Here are the choices that came up with. Looking for your advice.

Option 1: Utilize some form of epoxy or JB Weld, etc. to make hole in the castings smaller and drill it out to proper diameter.
Option 2: Weld in some Aluminum and drill it out.
Option 3: Oversize drill it and then sleeve it (praying I get the right ID for a tight fit)

Let me know what you think. Thanks in advance!

[Linked Image]
[Linked Image]
Posted By: JeffS

Re: Rudder Slop - 06/01/18 07:21 AM

on my Nacra's there's a little nylon plug that pushes into the hole in the casting and makes a tight fit on the pintle, would be worth finding out if there's some available for your boat or contacting Nacra to check out the size, they are cheap and awesome as you don't have any wear on your boat parts and just change the plugs every few years for zero slop
Posted By: samc99us

Re: Rudder Slop - 06/01/18 02:27 PM

Rehmbo,

McMaster-Carr sell a number of flanged sleeve bearings. See if one fits; metric bits are harder to come by, the Nacra bushings may be right for those pintails, may not be.

I've had good luck 3D printing bushings but they need one or 2 tries. I also drilled out my older Nacra castings to the new bushing size which worked well.

The other temporary fixes I've used are electrical tape or a step up PTFE tape.

-Sam
Posted By: rehmbo

Re: Rudder Slop - 06/06/18 10:31 AM

Hi -

I posed the question to the Goodall Design website. Received a response yesterday from Brett:

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Hi,

There is not a "factory" solution for this... In fact you are the first person to mention this.

If it is something you would like to fix, I would suggest drilling out your current holes and then having some liners machined from a high tensile polymer (bearing plastic) and pushed into the casting.

Although it is conceptually very simple, the tolerances are pretty small, so I'd suggest having a professional do the work.

Thanks for the feedback, this is something we will add to our list of improvement we can make to future models.

Cheers

Brett Goodall

Goodall Design

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I think my tentative plan at the moment is to see if I can find something off the shelf that would match the OD of the Pintles and then have a machine shop drill out the castings and press the liners/bushings in.
Posted By: JeffS

Re: Rudder Slop - 06/07/18 10:54 AM

Mate, Goodalls not going to tell you to buy anything Nacra but I would just buy the Nacra ones, they are so cheap, if the hole is too big, you can drill the holes on your castings a bit smaller and by the time you hammer in the Nacra ones they will have smaller holes, if the hole in the Nacra ones are too small, just knock them into the castings then drill them out while in the castings. Honestly if I lived near you I would do this process in about 30 minutes max with a cordless drill. I first did this on a boat about 10 years ago
Posted By: rehmbo

Re: Rudder Slop - 06/09/18 12:28 PM

Thanks Jeff -

agree implementation should be fairly quick/painless. Just wanted to be sure I started with the right strategy.

Will post pics/results of the final fix.

Thanks All
Posted By: rehmbo

Re: Rudder Slop - 06/11/18 10:55 AM

Quick update: C2 pintles are 7.6mm = ~0.299" diameter. Nacra are 9mm. Nacra bushings won't work.

Looking at some other off-the-shelf options.

Am considering one of the "easy install" designs with the slit sides (link) These would compress/expand slightly. The one with ID of 19/64" = 0.297" = 7.54mm is darn close.

If I don't use split sides, then will probably go slightly undersized on the flange bushing ID so I can file it out for final fit.

Also - Boat is about an hour away from me, so I'm doing a bit more planning on the front-end so the rework goes as smoothly as possible.
Posted By: Brett_C

Re: Rudder Slop - 02/02/19 05:38 AM

Hey Jeff;
What did you work out with your casting on your C2?
Posted By: rehmbo

Re: Rudder Slop - 02/16/19 09:03 PM

Hi Brett - sorry never ended making modifications. Last summer my boat was stored at a location that was not conducive to projects. Its on the agenda for this spring though.
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