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  1. #1
    wakewhornc's Avatar
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    what to use for shimming the ride plate

    did a quick search and couldnt find what i was looking for, although im sure its already on this site somewhere. what are you guys using to shim your rideplates? i thought about using some of my spark plug indexing washers, anybody see anything wrong with doing this? and what increments do you guys usually go by to find the sweet spot?


  2. #2
    WATER WOODY's Avatar
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    Ive used indexing washers for years but i stopped.Never had a problem BUT, the washer surface is so small that is does not allow full contact between the hull and mounting boses.To fix that is to use a full size washer on top and use the indexing washers on the bottom (plate side).If you use small washers on the tabs on the newer ski's,you can actually push up hard on one corner of the tabs and see the hull flex a little bit.Always use a wide washer.I have been making my own shims for a couple years and use them in conjunction with wide washers.

  3. #3
    i will get all the rest i need when im dead corkycat's Avatar
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    i shimmed my ride plate by using 6mm ally plate and cutting a piece either side so the ride plate has a full plate sanwiched between it and the hull,, i didnt want to put stress on the hull with wave jumping with such a small contact area.... (not sure if it does but it was precaution) and the 6mm plates took my ride plate flush with the pumpshoe. and i gained nearly 2mph

  4. #4
    One day at a time..... N8R's Avatar
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    I use credit cards which are .30thousands and also use Yamaha engine shims some are .10 thousands.. make sure you micrometer the sizes and that they are corrosion resistant

  5. #5
    Hydrotoys's Avatar
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    McMaster Carr sells aluminum "motor shims" that are used on electric motors. They are plastic color coated to make sizing a snap. They check out pretty tight with the calipers. They sell them in a nice little plastic box, with a ton of shims. They make it very easy to move shims in/out of rideplate without dropping it down very far.

  6. #6
    Hydrotoys's Avatar
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  7. #7
    I picked up some stainless slotted shims that work great. I got them at Graingers, don't know if they're National or not? They come in various thicknesses, I got .10, .15 and .20 thousandths.

  8. #8
    o uncola o's Avatar
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    Where did you buy those?

    Quote Originally Posted by Hydrotoys View Post

  9. #9
    Hydrotoys's Avatar
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    Read post above picture...

    or if that's too cryptic then try this...

    Go here first.
    http://www.mcmaster.com/#

    Then search for "motor shim stock"
    From there you can drill down the menu to find which ones you like. Tabbed, or untabbed.
    Aluminum or plastic
    I use the:

    9302K91Color-Coded Aluminum Slotted Shim 160 Piece Asst, 1-1/2" X 1-1/2" with 3/8" SlotIn stock at $43.32 Each

  10. #10
    wakewhornc's Avatar
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    Quote Originally Posted by Hydrotoys View Post
    Read post above picture...

    or if that's too cryptic then try this...

    Go here first.
    http://www.mcmaster.com/#

    Then search for "motor shim stock"
    From there you can drill down the menu to find which ones you like. Tabbed, or untabbed.
    Aluminum or plastic
    I use the:

    9302K91Color-Coded Aluminum Slotted Shim 160 Piece Asst, 1-1/2" X 1-1/2" with 3/8" SlotIn stock at $43.32 Each

    those look nice, im about to order a set

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