Underwater Gear

Keep your boat running smooth and tracking true with precision underwater gear from WaterSkis.com. Whether you're replacing a worn Mastercraft drive shaft, upgrading a Moomba rudder, or sourcing an exact-fit Supra strut, we carry genuine OEM and compatible parts built to match factory performance. This category includes critical inboard components like drive shafts, struts, rudders, and other hardware essential to your boat’s handling and power delivery.

Need to find the right part fast? Use our Boat Part Lookup Tool to identify inboard boat underwater gear for your exact year, make, and model—no guesswork required. We stock parts for top ski and wake brands, including Mastercraft, Moomba, and Supra, with quality you can trust in deep water or shallow turns.

For smooth rides and confident control, trust WaterSkis.com for the underwater gear that keeps your boat performing its best.

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  • 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
  • OJ Prop 14.75X14.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 14.75X14.5-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

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

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 14.75X14.5-4 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
  • OJ Prop 16.5X17-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 16.5X17-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

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

    OJ Props
    MSRP: $1,048.00
    $917.15
    OJ Prop 16.5X17-4 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 16X16.25-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 16X16.25-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 16X16.25-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $1,048.00
    $917.15
    OJ Prop 16X16.25-4 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: $1,048.00
    $917.15
    Subtotal:
    Add to Cart
  • OJ Prop 14.75X15.75-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 14.75X15.75-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

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

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 14.75X15.75-4 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...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $828.00
    $725.05
    Subtotal:
    Add to Cart
  • OJ Prop 16.5X19.25-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 16.5X19.25-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 16.5X19.25-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $1,048.00
    $917.15
    OJ Prop 16.5X19.25-4 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...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,048.00
    $917.15
    Subtotal:
    Add to Cart
  • OJ Prop 16.5X18-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 16.5X18-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 16.5X18-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $1,048.00
    $917.15
    OJ Prop 16.5X18-4 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 14.75X15.25-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 14.75X15.25-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 14.75X15.25-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 14.75X15.25-4 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...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $828.00
    $725.05
    Subtotal:
    Add to Cart
  • OJ Prop 18X17-4 Blade | Splined | Bore 1 1/8" | LH | 0.120 OJ Prop 18X17-4 Blade | Splined | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 18X17-4 Blade | Splined | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $1,139.00
    $997.05
    OJ Prop 18X17-4 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
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