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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  • Indmar Mallory Points | 751007

    Indmar Mallory Points | 751007

    Indmar
    $18.63
    Indmar Mallory Points | 751007 These ignition points were used in engines found in engines were used by MasterCraft, Malibu, Supra and Moomba boats with Mallory Distributors. Call Midwest Water Sports for all of your boat parts needs.Please note: No...
    Qty in Cart: 0
    Quantity:
    Price:
    $18.63
    Subtotal:
  • Indmar Mallory Rotor | 751006

    Indmar Mallory Rotor | 751006

    Indmar
    $8.59
    Indmar Mallory Rotor | 751006 These engines were used by MasterCraft, Malibu, Supra and Moomba boats call Midwest Water Sports for all of your boat parts needs.Please note: No returns will be accepted on installed boat parts. Use the boat part look up...
    Qty in Cart: 0
    Quantity:
    Price:
    $8.59
    Subtotal:
  • Indmar Mallory Distributor Cap | 751005

    Indmar Mallory Distributor Cap | 751005

    Indmar
    $35.83
    Indmar Mallory Distributor Cap | 751005 Please note: No returns will be accepted on installed Indmar parts. Use the boat part look up below to ensure you are purchasing the correct part for your boat.
    Qty in Cart: 0
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    Price:
    $35.83
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  • Indmar LT1-LTR Long Spark Plug Wire Set | 556010B

    Indmar LT1-LTR Long Spark Plug Wire Set | 556010B

    Indmar
    $110.40
    Indmar Spark Plug LT1/LTR Long Wires Get the spark your engine needs with a new spark plug wire set from Indmar. This wire set is for LT1/LTR engines. This wire set is only for the even number cylinders. You will need to order #556010A as well for a...
    Qty in Cart: 0
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    Price:
    $110.40
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  • OJ Prop 15X13.5-4 Blade | Splined | Bore 1 1/8" | LH

    OJ Prop 15X13.5-4 Blade | Splined | Bore 1 1/8" | LH

    OJ Props
    MSRP: $1,187.27
    $1,039.65
    OJ Prop 15X13.5-4 Blade | Splined | Bore 1 1/8" | LH By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-4 propellers boast an enhanced pitch distribution along with a new...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,187.27
    $1,039.65
    Subtotal:
  • OJ Prop 15X14.5-4 Blade | Splined | Bore 1 1/8" | LH (1816-MF)

    OJ Prop 15X14.5-4 Blade | Splined | Bore 1 1/8" | LH

    OJ Props
    MSRP: $1,187.27
    $1,039.65
    OJ Prop 15X14.5-4 Blade | Splined | Bore 1 1/8" | LH By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-4 propellers boast an enhanced pitch distribution along with a new...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,187.27
    $1,039.65
    Subtotal:
  • OJ Prop 13.5X16-4 Blade | Keyed | Bore 1 1/8" | LH (437-MF)

    OJ Prop 13.5X16-4 Blade | Keyed | Bore 1 1/8" | LH

    OJ Props
    MSRP: $919.13
    $804.42
    OJ Prop 13.5X16-4 Blade | Keyed | Bore 1 1/8" | LH 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 blade...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $919.13
    $804.42
    Subtotal:
  • OJ Prop 15X13.5-4 Blade | Keyed | Bore 1 1/8" | LH (1921-MF)

    OJ Prop 15X13.5-4 Blade | Keyed | Bore 1 1/8" | LH

    OJ Props
    MSRP: $1,187.27
    $1,039.65
    OJ Prop 15X13.5-4 Blade | Keyed | Bore 1 1/8" | LH By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-4 propellers boast an enhanced pitch distribution along with a new blade...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,187.27
    $1,039.65
    Subtotal:
  • OJ Prop 16X15-4 Blade | Keyed | Bore 1 1/8" | LH (963-MF)

    OJ Prop 16X15-4 Blade | Keyed | Bore 1 1/8" | LH

    OJ Props
    MSRP: $1,502.73
    $1,315.10
    OJ Prop 16X15-4 Blade | Keyed | Bore 1 1/8" | LH 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 blade...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,502.73
    $1,315.10
    Subtotal:
  • OJ Prop 15X12-4 Blade | Keyed | Bore 1 1/8" | LH (1997-MF)

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

    OJ Props
    MSRP: $1,187.27
    $1,039.65
    OJ Prop 15X12-4 Blade | Keyed | Bore 1 1/8" | LH By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-4 propellers boast an enhanced pitch distribution along with a new blade...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,187.27
    $1,039.65
    Subtotal:
  • OJ Prop 15X16.25-4 Blade | Keyed | Bore 1 1/8" | LH (1925-MF)

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

    OJ Props
    MSRP: $1,187.27
    $1,039.65
    OJ Prop 15X16.25-4 Blade | Keyed | Bore 1 1/8" | LH By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-4 propellers boast an enhanced pitch distribution along with a new blade...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,187.27
    $1,039.65
    Subtotal:
  • OJ Prop 15X14.5-4 Blade | Keyed | Bore 1 1/8" | LH (1916-MF)

    OJ Prop 15X14.5-4 Blade | Keyed | Bore 1 1/8" | LH

    OJ Props
    MSRP: $1,187.27
    $1,039.65
    OJ Prop 15X14.5-4 Blade | Keyed | Bore 1 1/8" | LH By refining OJ Propellers original superior design, they have produced their finest performing line of propellers. The Wakepro V-4 propellers boast an enhanced pitch distribution along with a new blade...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,187.27
    $1,039.65
    Subtotal:
  • OJ Prop 16X14-4 Blade | Keyed | Bore 1 1/8" | LH (964-MF)

    OJ Prop 16X14-4 Blade | Keyed | Bore 1 1/8" | LH

    OJ Props
    MSRP: $1,502.73
    $1,315.10
    OJ Prop 16X14-4 Blade | Keyed | Bore 1 1/8" | LH 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 blade...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,502.73
    $1,315.10
    Subtotal:
  • OJ Prop 16X13-4 Blade | Keyed | Bore 1 1/8" | LH (960-MF)

    OJ Prop 16X13-4 Blade | Keyed | Bore 1 1/8" | LH

    OJ Props
    MSRP: $1,502.73
    $1,315.10
    OJ Prop 16X13-4 Blade | Keyed | Bore 1 1/8" | LH 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 blade...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,502.73
    $1,315.10
    Subtotal:
  • OJ Prop 16X17-4 Blade | Keyed | Bore 1 1/8" | LH (967-MF)

    OJ Prop 16X17-4 Blade | Keyed | Bore 1 1/8" | LH

    OJ Props
    MSRP: $1,502.73
    $1,315.10
    OJ Prop 16X17-4 Blade | Keyed | Bore 1 1/8" | LH 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 blade...
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,502.73
    $1,315.10
    Subtotal:
  • Indmar Wix Oil Filter | 57060

    Indmar
    $18.63
    Indmar Wix Oil Filter | 57060   Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
    Quantity:
    Price:
    $18.63
    Subtotal:
  • Indmar Wix Oil Filter | 51061

    Indmar
    $21.49
    Indmar Wix Oil Filter | 51061   Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
    Quantity:
    Price:
    $21.49
    Subtotal:
  • Supra | Moomba Tracking Fin | 296 Supra | Moomba Tracking Fin | 296

    Supra | Moomba Tracking Fin | 296

    Skiers Choice
    $430.16
    Supra | Moomba Tracking Fin 113296 If you got yourself into a shallow spot on the lake and bent your tracking fin this is a OEM Supra and Moomba Replacement.  Fin, Tracking, 11-9/16 Long Use the Boat Part Lookup to ensure you are getting...
    Qty in Cart: 0
    Quantity:
    Price:
    $430.16
    Subtotal:
  • Supra | Moomba Rudder Assembly | 080

    Supra | Moomba Rudder Assembly | 080

    Skiers Choice
    $1,577.28
    Supra | Moomba Rudder Assembly | 117080 This is a complete rudder and rudder port assembly for Supra and Moomba Boats. Rudder Assembly Kit 105 degree, with tuning bar. Use the Boat Part Lookup to ensure you are getting the correct part for your...
    Qty in Cart: 0
    Quantity:
    Price:
    $1,577.28
    Subtotal:
  • Supra | Moomba Rudder Assembly | 202

    Supra | Moomba Rudder Assembly | 202

    Skiers Choice
    $2,652.70
    Supra | Moomba Rudder Assembly | 115202 This is a complete rudder and rudder port assembly for Supra and Moomba Boats. Rudder Assembly Kit 105 degree, no tuning wing. Use the Boat Part Lookup to ensure you are getting the correct part for your Supra...
    Qty in Cart: 0
    Quantity:
    Price:
    $2,652.70
    Subtotal:
  • Total: items /

Adding your products to cart

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.