Inboard Boat Parts

Keep your inboard boat running strong with genuine replacement parts for Mastercraft, Supra, Moomba, and other top performance brands. Whether you own a ski boat, wakeboard boat, or wakesurf boat, WaterSkis.com has the inboard boat parts you need to keep your time on the water uninterrupted.

Explore our curated selection of Mastercraft boat parts, Supra boat parts, Moomba boat parts, and more—sourced from trusted OEMs and aftermarket brands known for quality, compatibility, and long-term durability. Our inventory includes engine components, electrical parts, ballast fittings, and maintenance essentials tailored to inboard boats used for watersports.

Not sure what fits your boat? Use our Boat Part Lookup Tool to match parts by make, model, and year for total confidence. At WaterSkis.com, we’re committed to helping you get back to skiing, surfing, and riding—with gear that performs when it counts.

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  • OJ Prop 14.75X17.5-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 14.75X17.5-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 14.75X17.5-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with a...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $828.00
    $725.05
    Subtotal:
    Add to Cart
  • OJ Prop 14.75X14.5-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 14.75X14.5-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 14.75X14.5-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with a...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $828.00
    $725.05
    Subtotal:
    Add to Cart
  • OJ Prop 16.5X17-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 16.5X17-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $1,048.00
    $917.15
    OJ Prop 16.5X17-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with a...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,048.00
    $917.15
    Subtotal:
    Add to Cart
  • OJ Prop 14.75X15.75-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 14.75X15.75-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 14.75X15.75-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $828.00
    $725.05
    Subtotal:
    Add to Cart
  • OJ Prop 13.9X14.25-4 Blade | Keyed | Bore 1 1/8" | LH | 0.110
    Quick view

    OJ Prop 13.9X14.25-4 Blade | Keyed | Bore 1 1/8" | LH | 0.110

    OJ Props
    MSRP: $641.00
    $561.00
    OJ Prop 13.9X14.25-4 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 Wakepro V-3 propellers boast an enhanced pitch distribution along with a...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $641.00
    $561.00
    Subtotal:
    Add to Cart
  • OJ Prop 15X12.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 15X12.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 15X12.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 15X12.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with a...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $828.00
    $725.05
    Subtotal:
    Add to Cart
  • OJ Prop 17.5X16.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 17.5X16.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 17.5X16.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $1,095.00
    $958.80
    OJ Prop 17.5X16.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with a...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,095.00
    $958.80
    Subtotal:
    Add to Cart
  • OJ Prop 15X15-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 15X15-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 15X15-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 15X15-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with a...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $828.00
    $725.05
    Subtotal:
    Add to Cart
  • OJ Prop 15X14-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 15X14-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 15X14-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 15X14-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with a...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $828.00
    $725.05
    Subtotal:
    Add to Cart
  • OJ Prop 17X17-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 17X17-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 17X17-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $1,095.00
    $958.80
    OJ Prop 17X17-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with a...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,095.00
    $958.80
    Subtotal:
    Add to Cart
  • OJ Prop 18X16-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 18X16-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 18X16-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $1,139.00
    $997.05
    OJ Prop 18X16-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with a...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,139.00
    $997.05
    Subtotal:
    Add to Cart
  • OJ Prop 15X13-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 15X13-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 15X13-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 15X13-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with a...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $828.00
    $725.05
    Subtotal:
    Add to Cart
  • OJ Prop 18X15.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 18X15.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 18X15.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $1,139.00
    $997.05
    OJ Prop 18X15.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with a...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,139.00
    $997.05
    Subtotal:
    Add to Cart
  • OJ Prop 17.25X16.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 17.25X16.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 17.25X16.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $1,095.00
    $958.80
    OJ Prop 17.25X16.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,095.00
    $958.80
    Subtotal:
    Add to Cart
  • OJ Prop 15X16.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 15X16.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 15X16.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 15X16.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with a...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $828.00
    $725.05
    Subtotal:
    Add to Cart
  • OJ Prop 16X19-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 16X19-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 16X19-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $1,048.00
    $917.15
    OJ Prop 16X19-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with a...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,048.00
    $917.15
    Subtotal:
    Add to Cart
  • OJ Prop 15X16.25-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 15X16.25-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 15X16.25-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 15X16.25-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with a...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $828.00
    $725.05
    Subtotal:
    Add to Cart
  • OJ Prop 16X18-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 16X18-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 16X18-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $1,048.00
    $917.15
    OJ Prop 16X18-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with a...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,048.00
    $917.15
    Subtotal:
    Add to Cart
  • OJ Prop 14.75X17-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 14.75X17-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 14.75X17-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 14.75X17-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with a...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $828.00
    $725.05
    Subtotal:
    Add to Cart
  • OJ Prop 14.75X17.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 14.75X17.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 14.75X17.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 14.75X17.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-3 propellers boast an enhanced pitch distribution along with...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $828.00
    $725.05
    Subtotal:
    Add to Cart
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Whether you're fixing a small issue or tackling a full-season tune-up, WaterSkis.com is your go-to source for inboard boat parts that match your boat and your lifestyle. We carry trusted parts for MasterCraft, Supra, Moomba, and other leading ski and wakeboard boats—all backed by our expert support. Need help finding the exact part? Use our Boat Part Lookup Tool for a fast, accurate match. And don’t forget to check out related categories like Boat Cleaning Products and Ballast System Parts to complete your setup.