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 13X13-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90
    Quick view

    OJ Prop 13X13-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90

    OJ Props
    MSRP: $466.00
    $416.50
    OJ Prop 13X13-3 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 13X13-3 Blade | Keyed | Bore 1" | LH | 0.90
    Quick view

    OJ Prop 13X13-3 Blade | Keyed | Bore 1" | LH | 0.90

    OJ Props
    MSRP: $466.00
    $416.50
    OJ Prop 13X13-3 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 12X16-3 Blade | Keyed | Bore 1" | LH | 0.90
    Quick view

    OJ Prop 12X16-3 Blade | Keyed | Bore 1" | LH | 0.90

    OJ Props
    MSRP: $442.00
    $395.25
    OJ Prop 12X16-3 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: $442.00
    $395.25
    Subtotal:
    Add to Cart
  • OJ Prop 12X15-3 Blade | Keyed | Bore 1" | RH | 0.90
    Quick view

    OJ Prop 12X15-3 Blade | Keyed | Bore 1" | RH | 0.90

    OJ Props
    MSRP: $442.00
    $395.25
    OJ Prop 12X15-3 Blade | Keyed | Bore 1" | RH | 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: $442.00
    $395.25
    Subtotal:
    Add to Cart
  • OJ Prop 12X15-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90
    Quick view

    OJ Prop 12X15-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90

    OJ Props
    MSRP: $442.00
    $395.25
    OJ Prop 12X15-3 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: $442.00
    $395.25
    Subtotal:
    Add to Cart
  • OJ Prop 12X14-3 Blade | Keyed | Bore 1" | RH | 0.90
    Quick view

    OJ Prop 12X14-3 Blade | Keyed | Bore 1" | RH | 0.90

    OJ Props
    MSRP: $442.00
    $395.25
    OJ Prop 12X14-3 Blade | Keyed | Bore 1" | RH | 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: $442.00
    $395.25
    Subtotal:
    Add to Cart
  • OJ Prop 12X14-3 Blade | Keyed | Bore 1" | LH | 0.90
    Quick view

    OJ Prop 12X14-3 Blade | Keyed | Bore 1" | LH | 0.90

    OJ Props
    MSRP: $442.00
    $395.25
    OJ Prop 12X14-3 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: $442.00
    $395.25
    Subtotal:
    Add to Cart
  • OJ Prop 12X13-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90
    Quick view

    OJ Prop 12X13-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90

    OJ Props
    MSRP: $442.00
    $395.25
    OJ Prop 12X13-3 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: $442.00
    $395.25
    Subtotal:
    Add to Cart
  • OJ Prop 12X13-3 Blade | Keyed | Bore 1" | RH | 0.90
    Quick view

    OJ Prop 12X13-3 Blade | Keyed | Bore 1" | RH | 0.90

    OJ Props
    MSRP: $442.00
    $395.25
    OJ Prop 12X13-3 Blade | Keyed | Bore 1" | RH | 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: $442.00
    $395.25
    Subtotal:
    Add to Cart
  • OJ Prop 12X13-3 Blade | Keyed | Bore 1" | LH | 0.90
    Quick view

    OJ Prop 12X13-3 Blade | Keyed | Bore 1" | LH | 0.90

    OJ Props
    MSRP: $442.00
    $395.25
    OJ Prop 12X13-3 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: $442.00
    $395.25
    Subtotal:
    Add to Cart
  • OJ Prop 15X12.5-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120
    Quick view

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

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 15X12.5-4 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 15X14-4 Blade | Keyed | Bore 1 1/8" | LH | 0.130
    Quick view

    OJ Prop 15X14-4 Blade | Keyed | Bore 1 1/8" | LH | 0.130

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 15X14-4 Blade | Keyed | Bore 1 1/8" | LH | 0.130 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 new...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $828.00
    $725.05
    Subtotal:
    Add to Cart
  • OJ Prop 15X13-4 Blade | Keyed | Bore 1 1/8" | LH | 0.130
    Quick view

    OJ Prop 15X13-4 Blade | Keyed | Bore 1 1/8" | LH | 0.130

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 15X13-4 Blade | Keyed | Bore 1 1/8" | LH | 0.130 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 new...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $828.00
    $725.05
    Subtotal:
    Add to Cart
  • OJ Prop 15X15-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120
    Quick view

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

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 15X15-4 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 new...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $828.00
    $725.05
    Subtotal:
    Add to Cart
  • OJ Prop 15X14-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120
    Quick view

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

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 15X14-4 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 new...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $828.00
    $725.05
    Subtotal:
    Add to Cart
  • OJ Prop 15X13-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120
    Quick view

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

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 15X13-4 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 new...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $828.00
    $725.05
    Subtotal:
    Add to Cart
  • OJ Prop 15.5X18-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 15.5X18-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 15.5X18-4 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 15.5X16.5-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 15.5X16.5-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 15.5X16.5-4 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 15.5X15-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120
    Quick view

    OJ Prop 15.5X15-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 15.5X15-4 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 15X16.5-4 Blade | Keyed | Bore 1 1/8" | LH | 0.120
    Quick view

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

    OJ Props
    MSRP: $828.00
    $725.05
    OJ Prop 15X16.5-4 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
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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.