Inboard Boat Parts

Get the performance and reliability your inboard boat demands with premium replacement parts from WaterSkis.com. Whether you’re maintaining a MasterCraft, Supra, or Moomba boat, we offer a wide selection of genuine and OEM-compatible inboard boat parts to keep your engine, drivetrain, and cooling systems running strong.

From impellers and ignition components to thermostats and transmission parts, every item in this category is curated for quality, compatibility, and long-lasting performance. Not sure where to start? Use our Boat Part Lookup Tool to instantly find the exact part you need for your specific make, model, and engine configuration.

At WaterSkis.com, we know your time on the water matters. That’s why we make it easy to find the right boat parts—fast, accurate, and backed by real-world expertise.


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  • MasterCraft OEM Drive Shaft 52.5" - 345 MasterCraft OEM Drive Shaft 52.5" - 345

    MasterCraft OEM Drive Shaft 52.5" - 345

    MasterCraft
    $1,349.99
    MasterCraft OEM Drive Shaft 52.5" - 345 This genuine MasterCraft drive shaft is 52.5 inches long by 1-1/8 inch diameter with coupler. This drive shaft is specifically designed for the LSA Engine.   **The images are of a MasterCraft Drive Shaft,...
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    $1,349.99
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  • MasterCraft OEM Strut - 137 MasterCraft OEM Strut - 137

    MasterCraft OEM Strut - 137

    MasterCraft
    $639.99
    MasterCraft OEM Strut - 137 This genuine MasterCraft OEM Strut is model specific. Even a small bend in your strut can cause vibrations and long term damage to your drive shaft and possibly transmission. If you have a bent strut get your boat dialed back...
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    $639.99
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  • MasterCraft OEM Drive Shaft 48.75" - 342 MasterCraft OEM Drive Shaft 48.75" - 342MasterCraft OEM Drive Shaft 48.75" - 342

    MasterCraft OEM Drive Shaft 48.75" - 342

    MasterCraft
    $729.99
    MasterCraft OEM Drive Shaft 48.75" - 342 This drive shaft is measured to be 48.75 inches long by 1-1/8inch in diameter. Comes with a new prop nut and cotter pin.   **The images are of a MasterCraft Drive Shaft, however, the specific Drive Shaft may...
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    $729.99
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  • MasterCraft OEM Drive Shaft 50.5" - 341 MasterCraft OEM Drive Shaft 50.5" - 341

    MasterCraft OEM Drive Shaft 50.5" - 341

    MasterCraft
    $774.99
      MasterCraft OEM Drive Shaft 50.5" - 341 This drive shaft is measured to be 50.5 inches long by 1-1/8inch in diameter. Comes with a new prop nut and cotter pin.   **The images are of a MasterCraft Drive Shaft, however, the specific Drive Shaft...
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    $774.99
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  • MasterCraft OEM Drive Shaft 49" - 337 MasterCraft OEM Drive Shaft 49" - 337

    MasterCraft OEM Drive Shaft 49" - 337

    MasterCraft
    $754.99
    MasterCraft OEM Drive Shaft 49" - 337 This drive shaft is measured to be 49 inches long by 1-1/8inch in diameter. Comes with a new prop nut and cotter pin.   **The images are of a MasterCraft Drive Shaft, however, the specific Drive Shaft may look...
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    $754.99
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  • MasterCraft OEM Nose Cone Strut MasterCraft OEM Nose Cone Strut

    MasterCraft OEM Strut - 136

    MasterCraft
    $539.99
    MasterCraft OEM Strut - 136 This genuine MasterCraft OEM Strut is model specific. Even a small bend in your strut can cause vibrations and long term damage to your drive shaft and possibly transmission. If you have a bent strut get your boat dialed back...
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    $539.99
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  • MasterCraft OEM Drive Shaft 57.25" - 334 MasterCraft OEM Drive Shaft 57.25" - 334

    MasterCraft OEM Drive Shaft 57.25" - 334

    MasterCraft
    $594.99
    MasterCraft OEM Drive Shaft 57.25" - 334 This drive shaft is measured to be 57.25 inches long by 1-1/8inch in diameter. Comes with a new prop nut and cotter pin.   **The images are of a MasterCraft Drive Shaft, however, the specific Drive Shaft may...
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    $594.99
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  • MasterCraft OEM Drive Shaft 54.25" - 335 MasterCraft OEM Drive Shaft 54.25" - 335

    MasterCraft OEM Drive Shaft 54.25" - 335

    MasterCraft
    $1,049.99
    MasterCraft OEM Drive Shaft 54.25" - 335 This drive shaft is measured to be 54.25 inches long by 1-1/8inch in diameter. Comes with a new prop nut and cotter pin.   **The images are of a MasterCraft Drive Shaft, however, the specific Drive Shaft may...
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    $1,049.99
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  • MasterCraft OEM Strut - Port - 145 MasterCraft OEM Strut - Port - 145

    MasterCraft OEM Strut - Port - 101

    MasterCraft
    $294.99
    MasterCraft OEM Strut - Port - 101 This genuine MasterCraft OEM Strut is model specific. Even a small bend in your strut can cause vibrations and long term damage to your drive shaft and possibly transmission. If you have a bent strut get your boat...
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    $294.99
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  • MasterCraft OEM Drive Shaft 58" - 329 MasterCraft OEM Drive Shaft 58" - 329

    MasterCraft OEM Drive Shaft 58" - 329

    MasterCraft
    $975.99
    MasterCraft OEM Drive Shaft 58" - 329 This drive shaft is measured to be 58 inches long by 1-1/8inch in diameter and comes with a 5inch coupler. Comes with a new prop nut and cotter pin.   **The images are of a MasterCraft Drive Shaft, however, the...
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    $975.99
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  • MasterCraft OEM Drive Shaft 56.25"- 333 MasterCraft OEM Drive Shaft 56.25"- 333

    MasterCraft OEM Drive Shaft 56.25"- 333

    MasterCraft
    $559.99
    MasterCraft OEM Drive Shaft 56.25"- 333 This drive shaft is measured to be 56 and 1/4 inches long by 1-1/8inch in diameter. Comes with a new prop nut and cotter pin.   **The images are of a MasterCraft Drive Shaft, however, the specific Drive Shaft...
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    $559.99
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  • MasterCraft OEM Drive Shaft 52.25" - 310 MasterCraft OEM Drive Shaft 52.25" - 310

    MasterCraft OEM Drive Shaft 52.25" - 310

    MasterCraft
    $799.99
    Drive Shaft 52.25" x 1-1/8" This genuine MasterCraft drive shaft is 52.25 inches long by 1-1/8 inch diameter with coupler. This drive shaft is specifically designed for MasterCraft V-Drive boats. Comes with a new prop nut and cotter pin. Designed for...
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    $799.99
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  • MasterCraft Swim Platform Pin

    MasterCraft Swim Platform Pin

    MasterCraft
    MSRP: $24.99
    $19.99
    MasterCraft Swim Platform Pin These replacement pins for your removable or folding MasterCraft Swim Platform Pins are the perfect option whether yours are worn or at the bottom of the lake. These pins have a 1/4" diameter and a 1 7/8" usable length...
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    MSRP: $24.99
    $19.99
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  • MasterCraft 1" Rubber Windshield Bumper

    MasterCraft 1" Rubber Windshield Bumper

    MasterCraft
    MSRP: $9.99
    $7.99
    MasterCraft 1" Rubber Windshield Bumper This MasterCraft 1" Rubber Windshield Bumper has a through hole for you to screw onto your windshield. Built with rubber to stand the test of time, this protects the windshield and fiberglass around it from rubbing...
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    MSRP: $9.99
    $7.99
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  • Dual Battery Switch 4-Post

    Dual Battery Switch 4-Post

    MasterCraft
    $146.99
    Dual Battery Switch 4-Post Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
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    $146.99
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  • MasterCraft Fast Fill Ballast Impeller - 30 GPM MasterCraft Fast Fill Ballast Impeller - 30 GPM

    MasterCraft Fast Fill Ballast Impeller - 30 GPM

    MasterCraft
    $86.99
    MasterCraft Fast Fill Ballast Impeller - 30 GPM Replacement ballast Impeller for use with the optional Fast Fill Ballast Pumps in MasterCraft Boats. MasterCraft Fast Fill Ballast Impeller - 30 GPM are found in XT and X-Series boats with the Fast Fill...
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    $86.99
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  • MasterCraft Ballast Impeller STD - Orange 13.7 GPM Ballast Impeller STD - Orange 13.7 GPM

    Ballast Impeller STD - Orange 13.7 GPM

    MasterCraft
    $69.99
    Ballast Impeller STD - Orange 13.7 GPM Replacement ballast Impeller for use with Ballast Pumps in MasterCraft Boats. Orange Ballast impellers are designed for ballast systems found in XT and XSeries boats without the FastFill option. They feature a...
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    $69.99
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  • Bilge Pump - 750GPH Ultra (300109B) Bilge Pump - 750GPH Ultra (300109B)

    Bilge Pump - 750GPH Ultra

    MasterCraft
    $0.00
    Bilge Pump - 750GPH Ultra This bilge pump has been discontinued and has been replaced with this bilge pump - https://waterskis.com/bilge-pump-rule-800gph/ Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
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    $0.00
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  • Supra & Moomba Rear Drain Plug Rear Drain Plug Assembly

    Rear Drain Plug Assembly

    Skiers Choice
    $19.99
    Supra & Moomba Rear Drain Plug Lost your Brass Rear Supra & Moomba Rear Drain Plug?
    Qty in Cart: 0
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    $19.99
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  • MasterCraft OEM MMDC Box all Models 2002-2004 MasterCraft OEM MMDC Box all Models 2002-2004

    MasterCraft OEM MMDC Box all Models 2002-2004

    $3,999.99
    MasterCraft OEM MMDC Box all Models 2002-2004 Gauges not working after the winter or a cold snap? Your MMDC box is most likely the problem. Replace your MasterCraft MMDC Box and get everything back to working! This MasterCraft MMDC Box is direct from...
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    $3,999.99
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At WaterSkis.com, we combine deep product knowledge with industry-leading tools to help boat owners find the exact inboard boat parts they need. Whether you're working on a MasterCraft, Supra, or Moomba, our parts deliver the fit and reliability you can trust.

Use our Boat Part Lookup Tool to simplify your search, or explore related categories like cooling systems, engine components, and ignition parts. We’ve got everything you need to keep your boat running at its best.