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 12.5X17-4 Blade | Keyed | Bore 1" | RH | 0.90 OJ Prop 12.5X17-4 Blade | Keyed | Bore 1" | RH | 0.90
    Quick view

    OJ Prop 12.5X17-4 Blade | Keyed | Bore 1" | RH | 0.90

    OJ Props
    MSRP: $544.00
    $531.25
    OJ Prop 12.5X17-4 Blade | Keyed | Bore 1" | RH | 0.90 Like its predecessor, The LEGEND 3-blade, The FORCE 4-BLADE is a strong and affordable performer. The FORCE 4-Blade was the first 4-blade introduced that provided the tournament tow boat a strong,...
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    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $544.00
    $531.25
    Subtotal:
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  • OJ Prop 12X14-4 Blade | Keyed | Bore 1" | LH | 0.90 OJ Prop 12X14-4 Blade | Keyed | Bore 1" | LH | 0.90
    Quick view

    OJ Prop 12X14-4 Blade | Keyed | Bore 1" | LH | 0.90

    OJ Props
    MSRP: $544.00
    $531.25
    OJ Prop 12X14-4 Blade | Keyed | Bore 1" | LH | 0.90 Like its predecessor, The LEGEND 3-blade, The FORCE 4-BLADE is a strong and affordable performer. The FORCE 4-Blade was the first 4-blade introduced that provided the tournament tow boat a strong,...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $544.00
    $531.25
    Subtotal:
    Add to Cart
  • OJ Prop 12X13-4 Blade | Keyed | Bore 1 1/8" | LH | 0.90 OJ Prop 12X13-4 Blade | Keyed | Bore 1 1/8" | LH | 0.90
    Quick view

    OJ Prop 12X13-4 Blade | Keyed | Bore 1 1/8" | LH | 0.90

    OJ Props
    MSRP: $544.00
    $531.25
    OJ Prop 12X13-4 Blade | Keyed | Bore 1 1/8" | LH | 0.90 Like its predecessor, The LEGEND 3-blade, The FORCE 4-BLADE is a strong and affordable performer. The FORCE 4-Blade was the first 4-blade introduced that provided the tournament tow boat a strong,...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $544.00
    $531.25
    Subtotal:
    Add to Cart
  • OJ Prop 12X13-4 Blade | Keyed | Bore 1" | RH | 0.90 OJ Prop 12X13-4 Blade | Keyed | Bore 1" | RH | 0.90
    Quick view

    OJ Prop 12X13-4 Blade | Keyed | Bore 1" | RH | 0.90

    OJ Props
    MSRP: $544.00
    $531.25
    OJ Prop 12X13-4 Blade | Keyed | Bore 1" | RH | 0.90 Like its predecessor, The LEGEND 3-blade, The FORCE 4-BLADE is a strong and affordable performer. The FORCE 4-Blade was the first 4-blade introduced that provided the tournament tow boat a strong,...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $544.00
    $531.25
    Subtotal:
    Add to Cart
  • OJ Prop 12X13-4 Blade | Keyed | Bore 1" | LH | 0.90 OJ Prop 12X13-4 Blade | Keyed | Bore 1" | LH | 0.90
    Quick view

    OJ Prop 12X13-4 Blade | Keyed | Bore 1" | LH | 0.90

    OJ Props
    MSRP: $544.00
    $531.25
    OJ Prop 12X13-4 Blade | Keyed | Bore 1" | LH | 0.90 Like its predecessor, The LEGEND 3-blade, The FORCE 4-BLADE is a strong and affordable performer. The FORCE 4-Blade was the first 4-blade introduced that provided the tournament tow boat a strong,...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $544.00
    $531.25
    Subtotal:
    Add to Cart
  • OJ Prop 14X18-3 Blade | Keyed | Bore 1" | LH | 0.90
    Quick view

    OJ Prop 14X18-3 Blade | Keyed | Bore 1" | LH | 0.90

    OJ Props
    MSRP: $517.00
    $461.55
    OJ Prop 14X18-3 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: $517.00
    $461.55
    Subtotal:
    Add to Cart
  • OJ Prop 14X18-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90
    Quick view

    OJ Prop 14X18-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90

    OJ Props
    MSRP: $517.00
    $461.55
    OJ Prop 14X18-3 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: $517.00
    $461.55
    Subtotal:
    Add to Cart
  • OJ Prop 14X16-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90
    Quick view

    OJ Prop 14X16-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90

    OJ Props
    MSRP: $517.00
    $461.55
    OJ Prop 14X16-3 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: $517.00
    $461.55
    Subtotal:
    Add to Cart
  • OJ Prop 14X16-3 Blade | Keyed | Bore 1 1/8" | RH | 0.90
    Quick view

    OJ Prop 14X16-3 Blade | Keyed | Bore 1 1/8" | RH | 0.90

    OJ Props
    MSRP: $517.00
    $461.55
    OJ Prop 14X16-3 Blade | Keyed | Bore 1 1/8" | 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...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $517.00
    $461.55
    Subtotal:
    Add to Cart
  • OJ Prop 14X16-3 Blade | Keyed | Bore 1" | RH | 0.90
    Quick view

    OJ Prop 14X16-3 Blade | Keyed | Bore 1" | RH | 0.90

    OJ Props
    MSRP: $517.00
    $461.55
    OJ Prop 14X16-3 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: $517.00
    $461.55
    Subtotal:
    Add to Cart
  • OJ Prop 14X16-3 Blade | Keyed | Bore 1" | LH | 0.90
    Quick view

    OJ Prop 14X16-3 Blade | Keyed | Bore 1" | LH | 0.90

    OJ Props
    MSRP: $517.00
    $461.55
    OJ Prop 14X16-3 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: $517.00
    $461.55
    Subtotal:
    Add to Cart
  • OJ Prop 14X14-3 Blade | Keyed | Bore 1" | RH | 0.90
    Quick view

    OJ Prop 14X14-3 Blade | Keyed | Bore 1" | RH | 0.90

    OJ Props
    MSRP: $517.00
    $461.55
    OJ Prop 14X14-3 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: $517.00
    $461.55
    Subtotal:
    Add to Cart
  • OJ Prop 14X14-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90
    Quick view

    OJ Prop 14X14-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90

    OJ Props
    MSRP: $517.00
    $461.55
    OJ Prop 14X14-3 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: $517.00
    $461.55
    Subtotal:
    Add to Cart
  • OJ Prop 14X14-3 Blade | Keyed | Bore 1" | LH | 0.90
    Quick view

    OJ Prop 14X14-3 Blade | Keyed | Bore 1" | LH | 0.90

    OJ Props
    MSRP: $517.00
    $461.55
    OJ Prop 14X14-3 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: $517.00
    $461.55
    Subtotal:
    Add to Cart
  • OJ Prop 14X13-3 Blade | Keyed | Bore 1" | LH | 0.90
    Quick view

    OJ Prop 14X13-3 Blade | Keyed | Bore 1" | LH | 0.90

    OJ Props
    MSRP: $517.00
    $461.55
    OJ Prop 14X13-3 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: $517.00
    $461.55
    Subtotal:
    Add to Cart
  • OJ Prop 13X15-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90
    Quick view

    OJ Prop 13X15-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90

    OJ Props
    MSRP: $466.00
    $416.50
    OJ Prop 13X15-3 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 13X15-3 Blade | Keyed | Bore 1" | LH | 0.90
    Quick view

    OJ Prop 13X15-3 Blade | Keyed | Bore 1" | LH | 0.90

    OJ Props
    MSRP: $466.00
    $416.50
    OJ Prop 13X15-3 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 13X14-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90
    Quick view

    OJ Prop 13X14-3 Blade | Keyed | Bore 1 1/8" | LH | 0.90

    OJ Props
    MSRP: $466.00
    $416.50
    OJ Prop 13X14-3 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 13X14-3 Blade | Keyed | Bore 1" | LH | 0.90
    Quick view

    OJ Prop 13X14-3 Blade | Keyed | Bore 1" | LH | 0.90

    OJ Props

    MSRP: $466.00
    $416.50
    OJ Prop 13X14-3 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 13X13-3 Blade | Keyed | Bore 1" | RH | 0.90
    Quick view

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

    OJ Props
    MSRP: $466.00
    $416.50
    OJ Prop 13X13-3 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: $466.00
    $416.50
    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.