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 13.5X15.5-4 Blade | Keyed | Bore 1 1/8" | LH | 0.110
    Quick view

    OJ Prop 13.5X15.5-4 Blade | Keyed | Bore 1 1/8" | LH | 0.110

    OJ Props

    MSRP: $595.00
    $521.05
    OJ Prop 13.5X15.5-4 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: $595.00
    $521.05
    Subtotal:
    Add to Cart
  • OJ Prop 12.5X13-4 Blade | Splined | Bore 1 1/8" | LH | 0.90 OJ Prop 12.5X13-4 Blade | Splined | Bore 1 1/8" | LH | 0.90
    Quick view

    OJ Prop 12.5X13-4 Blade | Splined | Bore 1 1/8" | LH | 0.90

    OJ Props
    MSRP: $595.00
    $521.05
    OJ Prop 12.5X13-4 Blade | Splined | 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: $595.00
    $521.05
    Subtotal:
    Add to Cart
  • OJ Prop 12.5X12-4 Blade | Splined | Bore 1 1/8" | LH | 0.90 OJ Prop 12.5X12-4 Blade | Splined | Bore 1 1/8" | LH | 0.90
    Quick view

    OJ Prop 12.5X12-4 Blade | Splined | Bore 1 1/8" | LH | 0.90

    OJ Props
    MSRP: $595.00
    $521.05
    OJ Prop 12.5X12-4 Blade | Splined | 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: $595.00
    $521.05
    Subtotal:
    Add to Cart
  • OJ Prop 12.5X13-4 Blade | Keyed | Bore 1 1/8" | LH | 0.90
    Quick view

    OJ Prop 12.5X13-4 Blade | Keyed | Bore 1 1/8" | LH | 0.90

    OJ Props
    MSRP: $595.00
    $521.05
    OJ Prop 12.5X13-4 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: $595.00
    $521.05
    Subtotal:
    Add to Cart
  • OJ Prop 12.5X12-4 Blade | Keyed | Bore 1 1/8" | LH | 0.110
    Quick view

    OJ Prop 12.5X12-4 Blade | Keyed | Bore 1 1/8" | LH | 0.110

    OJ Props
    MSRP: $595.00
    $521.05
    OJ Prop 12.5X12-4 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: $595.00
    $521.05
    Subtotal:
    Add to Cart
  • OJ Prop 12.5X13-4 Blade | Keyed | Bore 1" | LH | 0.110
    Quick view

    OJ Prop 12.5X13-4 Blade | Keyed | Bore 1" | LH | 0.110

    OJ Props
    MSRP: $595.00
    $521.05
    OJ Prop 12.5X13-4 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: $595.00
    $521.05
    Subtotal:
    Add to Cart
  • OJ Prop 12.5X12-4 Blade | Keyed | Bore 1" | LH | 0.110
    Quick view

    OJ Prop 12.5X12-4 Blade | Keyed | Bore 1" | LH | 0.110

    OJ Props
    MSRP: $595.00
    $521.05
    OJ Prop 12.5X12-4 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: $595.00
    $521.05
    Subtotal:
    Add to Cart
  • OJ Prop 14X13-3 Blade | Splined | Bore 1 1/8" | LH | 0.110 OJ Prop 14X13-3 Blade | Splined | Bore 1 1/8" | LH | 0.110
    Quick view

    OJ Prop 14X13-3 Blade | Splined | Bore 1 1/8" | LH | 0.110

    OJ Props
    MSRP: $588.00
    $514.25
    OJ Prop 14X13-3 Blade | Splined | 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: $588.00
    $514.25
    Subtotal:
    Add to Cart
  • OJ Prop 13.4X10-3 Blade | Keyed | Bore 1 1/8" | LH | 0.110
    Quick view

    OJ Prop 13.4X10-3 Blade | Keyed | Bore 1 1/8" | LH | 0.110

    OJ Props
    MSRP: $588.00
    $514.25
    OJ Prop 13.4X10-3 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: $588.00
    $514.25
    Subtotal:
    Add to Cart
  • OJ Prop 14X13-3 Blade | Keyed | Bore 1 1/8" | LH | 0.110
    Quick view

    OJ Prop 14X13-3 Blade | Keyed | Bore 1 1/8" | LH | 0.110

    OJ Props
    MSRP: $588.00
    $514.25
    OJ Prop 14X13-3 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: $588.00
    $514.25
    Subtotal:
    Add to Cart
  • OJ Prop 13X13-3 Blade | Splined | Bore 1 1/8" | LH | 0.110 OJ Prop 13X13-3 Blade | Splined | Bore 1 1/8" | LH | 0.110
    Quick view

    OJ Prop 13X13-3 Blade | Splined | Bore 1 1/8" | LH | 0.110

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X13-3 Blade | Splined | 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 13X13-3 Blade | Keyed | Bore 1 1/8" | LH | 0.110
    Quick view

    OJ Prop 13X13-3 Blade | Keyed | Bore 1 1/8" | LH | 0.110

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X13-3 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 13X12.5-3 Blade | Splined | Bore 1 1/8" | LH | 0.110 OJ Prop 13X12.5-3 Blade | Splined | Bore 1 1/8" | LH | 0.110
    Quick view

    OJ Prop 13X12.5-3 Blade | Splined | Bore 1 1/8" | LH | 0.110

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X12.5-3 Blade | Splined | 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 13X12.5-3 Blade | Splined | Bore 1 1/8" | LH | 0.90 OJ Prop 13X12.5-3 Blade | Splined | Bore 1 1/8" | LH | 0.90
    Quick view

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

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X12.5-3 Blade | Splined | 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 | Splined | Bore 1 1/8" | LH | 0.110 OJ Prop 13X12-3 Blade | Splined | Bore 1 1/8" | LH | 0.110
    Quick view

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

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X12-3 Blade | Splined | 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 13X12-3 Blade | Splined | Bore 1 1/8" | LH | 0.90 OJ Prop 13X12-3 Blade | Splined | Bore 1 1/8" | LH | 0.90
    Quick view

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

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X12-3 Blade | Splined | 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 13X11.5-3 Blade | Splined | Bore 1 1/8" | LH | 0.90 OJ Prop 13X11.5-3 Blade | Splined | Bore 1 1/8" | LH | 0.90
    Quick view

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

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X11.5-3 Blade | Splined | 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 | Splined | Bore 1 1/8" | LH | 0.110 OJ Prop 13X11-3 Blade | Splined | Bore 1 1/8" | LH | 0.110
    Quick view

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

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X11-3 Blade | Splined | 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 13X11-3 Blade | Splined | Bore 1 1/8" | LH | 0.90 OJ Prop 13X11-3 Blade | Splined | Bore 1 1/8" | LH | 0.90
    Quick view

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

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X11-3 Blade | Splined | 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 13X12.5-3 Blade | Keyed | Bore 1 1/8" | LH | 0.110
    Quick view

    OJ Prop 13X12.5-3 Blade | Keyed | Bore 1 1/8" | LH | 0.110

    OJ Props
    MSRP: $550.00
    $481.10
    OJ Prop 13X12.5-3 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
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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.