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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  • Tower Navigation Light Lens Cap Tower Navigation Light Lens Cap
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    Navigation Light Lens Cap

    MasterCraft

    MSRP: $19.99
    $14.99
    MasterCraft Tower Navigation Light Cap Replacement MasterCraft Tower Navigation Light Lens Cap for use on MasterCraft towers.  No matter what the reason you tell your buddies as to why the lens cap is missing you need to replace it. This is an exact...
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    MSRP: $19.99
    $14.99
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  • Supra Boats Black Hull Decal
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    Supra Boats Black Hull Decal

    Supra Boats
    $699.99
    Supra Boats Black Hull Decal Give your Supra Boat an updated look with the New OEM Black ChroMax Decal. The Black ChroMax decal has raised lettering.This decal is sold individually. Use the boat part look up below to ensure you are purchasing the correct...
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    $699.99
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  • Supra Boats Chrome Hull Decal
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    Supra Boats Chrome Hull Decal

    Supra Boats
    $699.99
    Supra Boats Chrome Hull Decal Give your Supra Boat an updated look with the New OEM ChroMax Decal. The ChroMax decal has raised lettering.This decal is sold individually. Use the boat part look up below to ensure you are purchasing the correct part for...
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    $699.99
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  • MasterCraft Fast Fill Ballast Pump Fitting - 1.5"
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    MasterCraft Fast Fill Ballast Pump Fitting - 1.5"

    MasterCraft
    $15.99
    MasterCraft Fast Fill Ballast Pump Fitting - 1.5" Fitting - 90* Female 1.5" NPT to 1.5" Barbed Use the boat part look up below to ensure you are purchasing the correct part for your boat.
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  • Indmar Thermostat 160* GEN 4 6.0L/6.2L
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    Indmar Thermostat 160* GEN 4 6.0L/6.2L

    Indmar
    $49.99
    Indmar Thermostat 160* GEN 4 6.0L/6.2L GEN 4 160* Thermostat for LY6, LS2, L96, LS3, and LSA Raw Water Cooled Engines.
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  • Ilmor Raw Water Impeller | 51A0191
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    Ilmor Raw Water Impeller | 51A0191

    Ilmor
    $79.99
    Ilmor Marine Raw Water Impeller Kit – 6.2L GDI Supercharged Engines Keep Your Ilmor Engine Running Cool – OEM-Raw Water Impeller Kit for Ilmor 6.2L GDI Supercharged Engines The Ilmor Marine Raw Water Impeller Kit is a must-have for...
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  • Indmar Transmission Cooler 5" O-Ring Fitting w/Adapters
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    Indmar Transmission Cooler 5" O-Ring Fitting w/Adapters

    Indmar
    $249.99
    Indmar Transmission Cooler 5" O-Ring Fitting w/Adapters 5" Oil or Transmission Cooler with 601015 adapter fittings for older 3/8" NPT connections. Use the boat part look up below to ensure you are purchasing the correct part for your boat.
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    $249.99
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  • Prop Nut for 1-1/4" Shafts
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    Prop Nut for 1-1/4" Shafts

    OJ Props
    $29.99
    Inboard Prop Nut for 1-1/4" Shafts A simple replacement for you lost or damaged inboard prop nut. This is a universal part that fits MasterCraft, Malibu, Supra, and Nautique boats with a 1-1/4" drive shaft. Don't be a fool, keep a spare on hand...
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  • OJ Prop Puller for Inboard Boats | 1-1/4" Shaft
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    OJ Prop Puller For Inboard Boats | 1-1/4" Shaft

    OJ Props
    $160.00
    OJ Prop Puller for Inboard Boats | 1-1/4" Shaft Effortless Propeller Removal – Built Tough for Serious Boat Owners The OJ Prop Puller is a must-have tool for any inboard boat owner looking to remove or replace their propeller with ease and...
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    $160.00
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  • MasterCraft Gauge - Tach White 2006
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    MasterCraft Gauge - Tach White 2006

    MasterCraft
    $1,499.99
    MasterCraft Gauge - Tach White 2006 MasterCraft Gauge - Tach. White face. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
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  • OJ SKIPRO Prop 13.9X14.25-4 Blade | Splined | Bore 1 1/8" | LH
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    OJ SKIPRO Prop 13.9X14.25-4 Blade | Splined | Bore 1 1/8" | LH

    OJ Props
    MSRP: $660.00
    $561.00
    OJ SKIPRO Prop 13.9X14.25-4 Blade | Splined | Bore 1 1/8" | LH The OJ SKIPRO V-4 1709 4 Blade 13.9" X 14.25" LH-4 BLADE SPLINED BORE Propeller features a new blade shape and pitch distribution along with OJ's unique cupping feature for better top end...
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    MSRP: $660.00
    $561.00
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  • OJ SKIPRO Prop 14X13.5-3 Blade | Splined | Bore 1 1/8" | LH
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    OJ SKIPRO Prop 14X13.5-3 Blade | Splined | Bore 1 1/8" | LH

    OJ Props
    MSRP: $605.00
    $514.25
    OJ SKIPRO Prop 14X13.5-3 Blade | Splined | Bore 1 1/8" | LH The OJ SKIPRO V-3 867 3 Blade 14" X 13.5" LH-3 BLADE SPLINED BORE Propeller boasts an enhanced pitch distribution along with a new blade shape that produces better top end and low end power. Use...
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    MSRP: $605.00
    $514.25
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  • OJ Evolution Prop 18X17.5-4 Blade | Splined | Bore 1 1/4" | LH
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    OJ Evolution Prop 18X17.5-4 Blade | Splined | Bore 1 1/4" | LH

    OJ Props
    MSRP: $1,173.00
    $997.05
    OJ Evolution Prop 18X17.5-4 Blade | Splined | Bore 1 1/4" | LH The OJ Evolution 3602-MF 4 Blade 18" X  17.5" LH 4-BLADE SPLINED BORE Propeller features a complete blade shape and pitch distribution redesign. Evolving from our successful WAKEPRO and...
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    MSRP: $1,173.00
    $997.05
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  • OJ Evolution Prop 15X12-4 Blade | Splined | Bore 1 1/8" | LH
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    OJ Evolution Prop 15X12-4 Blade | Splined | Bore 1 1/8" | LH

    OJ Props
    MSRP: $853.00
    $725.05
    OJ Evolution Prop 15X12-4 Blade | Splined | Bore 1 1/8" | LH The OJ Evolution 3043-MF 4 Blade 15" X  12" LH 4-BLADE SPLINED BORE Propeller features a complete blade shape and pitch distribution redesign. Evolving from our successful WAKEPRO and V-4...
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    MSRP: $853.00
    $725.05
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  • OJ Evolution Prop 15X13-4 Blade | Splined | Bore 1 1/8" | LH
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    OJ Evolution Prop 15X13-4 Blade | Splined | Bore 1 1/8" | LH

    OJ Props
    MSRP: $853.00
    $725.05
    OJ Evolution Prop 15X13-4 Blade | Splined | Bore 1 1/8" | LH The OJ Evolution 3033-MF 4 Blade 15" X 13" LH 4-BLADE SPLINED BORE Propeller features a complete blade shape and pitch distribution redesign. Evolving from our successful WAKEPRO and V-4...
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    MSRP: $853.00
    $725.05
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  • OJ Evolution Prop 17.5X16.5-4 Blade | Splined | Bore 1 1/8" | LH
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    OJ Evolution Prop 17.5X16.5-4 Blade | Splined | Bore 1 1/8" | LH

    OJ Props
    MSRP: $1,128.00
    $958.80
    OJ Evolution Prop 17.5X16.5-4 Blade | Splined | Bore 1 1/8" | LH The OJ Evolution 3028-MF 4 Blade 17.5" X 16.5" LH 4-BLADE SPLINED BORE Propeller features a complete blade shape and pitch distribution redesign. Evolving from our successful WAKEPRO and...
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    MSRP: $1,128.00
    $958.80
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  • OJ Evolution Prop 16.5X15-4 Blade | Splined | Bore 1 1/8" | LH
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    OJ Evolution Prop 16.5X15-4 Blade | Splined | Bore 1 1/8" | LH

    OJ Props
    MSRP: $1,079.00
    $917.15
    OJ Evolution Prop 16.5X15-4 Blade | Splined | Bore 1 1/8" | LH The OJ Evolution 3027-MF 4 Blade 16.5" X 15" LH 4-BLADE SPLINED BORE Propeller features a complete blade shape and pitch distribution redesign. Evolving from our successful WAKEPRO and V-4...
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    MSRP: $1,079.00
    $917.15
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  • OJ Evolution Prop 15X15.25-4 Blade | Splined | Bore 1 1/8" | LH
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    OJ Evolution Prop 15X15.25-4 Blade | Splined | Bore 1 1/8" | LH

    OJ Props
    MSRP: $853.00
    $725.05
    OJ Evolution Prop 15X15.25-4 Blade | Splined | Bore 1 1/8" | LH The OJ Evolution 3025-MF 4 Blade 15" X 15.25" LH 4-BLADE SPLINED BORE Propeller features a complete blade shape and pitch distribution redesign. Evolving from our successful WAKEPRO and V-4...
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    MSRP: $853.00
    $725.05
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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.