Edson Rusted Idler Plate - SailNet Community
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post #1 of 15 Old 01-06-2020 Thread Starter
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Edson Rusted Idler Plate

So, the Idler plates on my Edson steering pedestal are badly rusted (see the pictures). Edson replaced them with Aluminum ones in the early 2000's, but mine sadly predates that.

Edson wants $420 for a replacement and the cheapest ebay alternative is $300 + shipping (which is a steel one).

So, I am thinking of fabricating my own with G-10 sheets. The Sheaves are bronze and are in good shape, I could just cut them out of the rusted metal and screw them on to the G-10 sheets.

My questions are:
  1. What would be the minimum strength for the G-10 sheets? The thinner the better because of clearance issues, but obviously too thin will cause structural issues.
  2. Phenolic G-10 Sheets are much cheaper than Epoxy G-10 sheets, is there a difference in strength for my purpose?
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post #2 of 15 Old 01-06-2020
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Re: Edson Rusted Idler Plate

Maybe my eyes are bad but those look like they can be cleaned up.
Regardless, a machine shop could make them in 316
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post #3 of 15 Old 01-06-2020 Thread Starter
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Re: Edson Rusted Idler Plate

How would you clean it up? Towards the center, the rust has penetrated every layer of the backing plate. To me, this appears to be structurally compromised - or is there a way to fix this?
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Re: Edson Rusted Idler Plate

Pull it from boat, remove rust..inspect well
Has to come out anyway
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post #5 of 15 Old 01-06-2020
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Re: Edson Rusted Idler Plate

316 or aluminum, pull it out and take it to a fabrication shop.

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Re: Edson Rusted Idler Plate

Yeah looking at the pics the only holes I see look like they are supposed to be there. It looks like surface rust. I would pull it, sandblast or wire brush, inspect and prime and paint it if it checks out.

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Re: Edson Rusted Idler Plate

Looks to be about an hours work in the workshop with a good sheet of 316.
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Re: Edson Rusted Idler Plate

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Originally Posted by Steve Bateman View Post
Looks to be about an hours work in the workshop with a good sheet of 316.
Assuming you have the right tools. Even so, you will notice the plate is not flat. There are raised channels to accommodate the bolt heads while allowing the plate to mount flush.

I'm not saying someone with mechanical skills can't fabricate a new one, just saying it may not be as simple as an hours work.

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Re: Edson Rusted Idler Plate

I would make it out if SS does not need to be 316, 304 would work. it does not need the channel or the curved slots. the plate is designed to be universal to fit any boat but once you know the mounting angle of the sheaves all that is needed is a tapped hole for the bolts so it becomes a plate with four mounting holes and four tapped holes for the sheave mounting bolts. could be through bolted if you make a clearance hole in the fiberglass under the plate
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Re: Edson Rusted Idler Plate

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Originally Posted by overbored View Post
I would make it out if SS does not need to be 316, 304 would work. it does not need the channel or the curved slots. the plate is designed to be universal to fit any boat but once you know the mounting angle of the sheaves all that is needed is a tapped hole for the bolts so it becomes a plate with four mounting holes and four tapped holes for the sheave mounting bolts. could be through bolted if you make a clearance hole in the fiberglass under the plate
I was thinking of doing the same with G-10. With G10, all I would need is some brass bushings to secure the one end of sheaves to the G-10 plate and I could screw the the other end of the sheave directly into the G-10.

If G-10 can structurally deal with the load and deal with the moisture, then I am thinking, it might be the way to go.
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