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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  • OJ Prop 13X12.5-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90
    Quick view

    OJ Prop 13X12.5-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X12.5-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The SkiPro propellers boast an enhanced pitch distribution along with a new...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $550.00
    $481.10
    Subtotal:
    Add to Cart
  • OJ Prop 13X12-3 Blade | Keyed | Bore 1 1/8" | LH | 0.110
    Quick view

    OJ Prop 13X12-3 Blade | Keyed | Bore 1 1/8" | LH | 0.110

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X12-3 Blade | Keyed | Bore 1 1/8" | LH | 0.110 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The SkiPro propellers boast an enhanced pitch distribution along with a new blade...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $550.00
    $481.10
    Subtotal:
    Add to Cart
  • OJ Prop 13X12-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90
    Quick view

    OJ Prop 13X12-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90

    OJ Props
    MSRP: $466.00
    $416.50
    OJ Prop 13X12-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90 The name speaks for itself. The original LEGEND is a design handed down from the originator, Oscar Johnson. This hand crafted 3-blade has been a consistent performer for many years. The LEGEND...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $466.00
    $416.50
    Subtotal:
    Add to Cart
  • OJ Prop 13X11.5-3 Blade | Keyed | Bore 1 1/8" | LH | 0.110
    Quick view

    OJ Prop 13X11.5-3 Blade | Keyed | Bore 1 1/8" | LH | 0.110

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X11.5-3 Blade | Keyed | Bore 1 1/8" | LH | 0.110 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The SkiPro propellers boast an enhanced pitch distribution along with a new...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $550.00
    $481.10
    Subtotal:
    Add to Cart
  • OJ Prop 13X11.5-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90
    Quick view

    OJ Prop 13X11.5-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X11.5-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The SkiPro propellers boast an enhanced pitch distribution along with a new...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $550.00
    $481.10
    Subtotal:
    Add to Cart
  • OJ Prop 13X11-3 Blade | Keyed | Bore 1 1/8" | LH | 0.110
    Quick view

    OJ Prop 13X11-3 Blade | Keyed | Bore 1 1/8" | LH | 0.110

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X11-3 Blade | Keyed | Bore 1 1/8" | LH | 0.110 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The SkiPro propellers boast an enhanced pitch distribution along with a new blade...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $550.00
    $481.10
    Subtotal:
    Add to Cart
  • OJ Prop 13X11-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90 OJ Prop 13X11-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90
    Quick view

    OJ Prop 13X11-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X11-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The SkiPro propellers boast an enhanced pitch distribution along with a new blade...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $550.00
    $481.10
    Subtotal:
    Add to Cart
  • OJ Prop 13X12.5-3 Blade | Keyed | Bore 1" | LH | 0.90
    Quick view

    OJ Prop 13X12.5-3 Blade | Keyed | Bore 1" | LH | 0.110

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X12.5-3 Blade | Keyed | Bore 1" | LH | 0.110 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The SkiPro propellers boast an enhanced pitch distribution along with a new blade...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $550.00
    $481.10
    Subtotal:
    Add to Cart
  • OJ Prop 13X12.5-3 Blade | Keyed | Bore 1" | LH | 0.90
    Quick view

    OJ Prop 13X12.5-3 Blade | Keyed | Bore 1" | LH | 0.90

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X12.5-3 Blade | Keyed | Bore 1" | LH | 0.90 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The SkiPro propellers boast an enhanced pitch distribution along with a new blade...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $550.00
    $481.10
    Subtotal:
    Add to Cart
  • OJ Prop 13X12-3 Blade | Keyed | Bore 1" | LH | 0.110
    Quick view

    OJ Prop 13X12-3 Blade | Keyed | Bore 1" | LH | 0.110

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X12-3 Blade | Keyed | Bore 1" | LH | 0.110 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The SkiPro propellers boast an enhanced pitch distribution along with a new blade...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $550.00
    $481.10
    Subtotal:
    Add to Cart
  • OJ Prop 13X12-3 Blade | Keyed | Bore 1" | LH | 0.90
    Quick view

    OJ Prop 13X12-3 Blade | Keyed | Bore 1" | LH | 0.90

    OJ Props
    MSRP: $466.00
    $416.50
    OJ Prop 13X12-3 Blade | Keyed | Bore 1" | LH | 0.90 The name speaks for itself. The original LEGEND is a design handed down from the originator, Oscar Johnson. This hand crafted 3-blade has been a consistent performer for many years. The LEGEND 3-blade...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $466.00
    $416.50
    Subtotal:
    Add to Cart
  • OJ Prop 13X11.5-3 Blade | Keyed | Bore 1" | LH | 0.110
    Quick view

    OJ Prop 13X11.5-3 Blade | Keyed | Bore 1" | LH | 0.110

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X11.5-3 Blade | Keyed | Bore 1" | LH | 0.110 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The SkiPro propellers boast an enhanced pitch distribution along with a new blade...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $550.00
    $481.10
    Subtotal:
    Add to Cart
  • OJ Prop 13X11.5-3 Blade | Keyed | Bore 1" | LH | 0.90
    Quick view

    OJ Prop 13X11.5-3 Blade | Keyed | Bore 1" | LH | 0.90

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X11.5-3 Blade | Keyed | Bore 1" | LH | 0.90 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The SkiPro propellers boast an enhanced pitch distribution along with a new blade...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $550.00
    $481.10
    Subtotal:
    Add to Cart
  • OJ Prop 13X11-3 Blade | Keyed | Bore 1" | LH | 0.110
    Quick view

    OJ Prop 13X11-3 Blade | Keyed | Bore 1" | LH | 0.110

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X11-3 Blade | Keyed | Bore 1" | LH | 0.110 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The SkiPro propellers boast an enhanced pitch distribution along with a new blade...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $550.00
    $481.10
    Subtotal:
    Add to Cart
  • OJ Prop 13X11-3 Blade | Keyed | Bore 1" | LH | 0.90
    Quick view

    OJ Prop 13X11-3 Blade | Keyed | Bore 1" | LH | 0.90

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X11-3 Blade | Keyed | Bore 1" | LH | 0.90 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The SkiPro propellers boast an enhanced pitch distribution along with a new blade...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $550.00
    $481.10
    Subtotal:
    Add to Cart
  • Quick view

    MasterCraft OEM Tracking Fin - 654

    MasterCraft
    $199.99
    MasterCraft OEM Tracking Fin- 654 This genuine MasterCraft OEM Tracking is model specific. If you have damaged your rudder Tracking Fin it is typical that you have with other Under Water Gear damage. Use the Parts Finder to select your year make and...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $199.99
    Subtotal:
    Add to Cart
  • Quick view

    MasterCraft OEM Tracking Fin - 653

    MasterCraft
    $129.99
    MasterCraft OEM Tracking Fin- 653 This genuine MasterCraft OEM Tracking is model specific. If you have damaged your rudder Tracking Fin it is typical that you have with other Under Water Gear damage. Use the Parts Finder to select your year make and...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $129.99
    Subtotal:
    Add to Cart
  • MasterCraft OEM Rudder Port- 174
    Quick view

    MasterCraft OEM Rudder Port - 174

    MasterCraft
    $323.99
    MasterCraft OEM Rudder Port- 174 This genuine MasterCraft OEM Rudder Port is model specific. If you have damaged your rudder Port it is typical that your Rudder is also damaged along with other Under Water Gear. Use the Parts Finder to select your year...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $323.99
    Subtotal:
    Add to Cart
  • MasterCraft OEM Rudder MasterCraft OEM Rudder
    Quick view

    MasterCraft OEM Rudder - 657

    MasterCraft
    $479.99
    MasterCraft OEM Rudder- 657 This genuine MasterCraft OEM Rudder is model specific. If you have damaged your rudder it is typical that your Rudder Port is also damaged along with other UnderWater Gear. Use the Parts Finder to select your year make and...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $479.99
    Subtotal:
    Add to Cart
  • MasterCraft OEM Rudder MasterCraft OEM Rudder
    Quick view

    MasterCraft OEM Rudder - 651

    MasterCraft
    $829.99
    MasterCraft OEM Rudder- 651 This genuine MasterCraft OEM Rudder is model specific. If you have damaged your rudder it is typical that your Rudder Port is also damaged along with other UnderWater Gear. Use the Parts Finder to select your year make and...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $829.99
    Subtotal:
    Add to Cart
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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.