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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  • MasterCraft Circuit Breaker 5 Amp

    MasterCraft Circuit Breaker 5 Amp

    MasterCraft
    MSRP: $19.99
    $16.99
    MasterCraft Boats 5 Amp Circut Breaker Genuine MasterCraft boats 5 Amp circuit breaker. This marine circuit breaker is ignition protected for use in many marine applications. Features screw top installation with a two prong input. Midwest MasterCraft...
    Qty in Cart: 0
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    MSRP: $19.99
    $16.99
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  • Spark Plugs for 70's-'92 MasterCraft Boats

    MasterCraft Boats Engine Spark Plug Set (Ford Std Engines)

    MasterCraft
    $54.99
    Spark Plugs for 70's-'92 MasterCraft Boats Get the spark you are after in your MasterCraft boat with new MasterCraft Spark Plugs. Fits standard output Ford 351w, 302 (5.8, 5.0) engines 1975 through the early '90s from PCM and Indmar. Set of 8. Specs;...
    Qty in Cart: 0
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    $54.99
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  • Reliable Bearing Protector for 2005 to 2007 MasterCraft Single Axle Trailers Reliable Bearing Protector for 2005 to 2007 MasterCraft Single Axle Trailers

    Reliable Bearing Protector for 2005 to 2007 MasterCraft Single Axle Trailers

    MasterCraft

    $79.99
    Reliable Bearing Protector for 2005 to 2007 MasterCraft Single Axle Trailers This is a bearing protector for 2005, 2006 and 2007 MasterCraft single axle trailers with reliable oil bath hubs. This style of bearing protector threads in to place and has a...
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    $79.99
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  • Ilmor Drive Belt Tensioner | 1134 Ilmor Drive Belt Tensioner | 1134

    Ilmor Drive Belt Tensioner | 1134

    Ilmor

    $159.99
    MasterCraft Ilmor 6.0L 6.2L DRVE Belt Tensioner Ilmor’s belt tensioner reduces belt wear and ensures your engine’s drive belt is operating at peak performance and reliability. Ilmor DRVE Belt Tensioner for MasterCraft boats. Specifically designed by...
    Qty in Cart: 0
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    $159.99
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  • Indmar Ford MasterCraft Tune Up Kit

    MasterCraft Engine Tune Up Kit (87-Up)

    Indmar
    MSRP: $149.99
    $145.99
    MasterCraft Boats Tune Up Kit Is your Ford Powered MasterCraft boat Tune up kit will help that engine that is not running that well anymore? Give it a tune up with our specifically designed MasterCraft Tune Up Kit. Fits Ford & GM based V8 engines...
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    MSRP: $149.99
    $145.99
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  • Ilmor MAP Sensor (5.7L) | 1053 Ilmor MAP Sensor (5.7L) | 1053

    Ilmor MAP Sensor (5.7L) | 1053

    Ilmor
    $119.99
    Ilmor 5.7L MAP Sensor Ilmor specified manifold air pressure sensor (MAP sensor) is designed as an exact replacement for your Ilmor engine and provides exceptional reliability and longevity. Ilmor MAP Sensor for MasterCraft boats. Specifically designed by...
    Qty in Cart: 0
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    $119.99
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  • Prop Nut for 1" & 1-1/8" Shafts Prop Nut for 1" & 1 1/8" Shafts

    Prop Nut for 1" & 1-1/8" Shafts

    OJ Props
    MSRP: $19.99
    $16.99
    Inboard Boat Prop Nut for 1" and 1-1/8" Drive Shafts A simple replacement for you lost or damaged inboard prop nut. This is a universal part that fits MasterCraft, Malibu, Supra, Moomba, Gekko, Correct Craft, Nautique and Sanger boats with a 1" or a...
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    MSRP: $19.99
    $16.99
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  • MasterCraft OEM Drive Shaft 52.5" - 325 MasterCraft OEM Drive Shaft 52.5" - 325

    MasterCraft OEM Drive Shaft 52.5" - 325

    MasterCraft

    $799.99
    MasterCraft OEM Drive Shaft 52.5" - 325 This is a 52.5 inch long by 1 1/8 inch diameter MasterCraft drive shaft with coupler.  This is a Genuine MasterCraft replacement part. Includes new prop nut and cotter pin. Designed for boats with a splined...
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    $799.99
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  • MasterCraft Boats Domed Logo Decal

    MasterCraft Boats Domed Decal

    MasterCraft

    $299.99 - $449.99
    MasterCraft Boats Domed Logo Decal Damaged or Faded MasterCraft Graphics? Want to Update the look of your MasterCraft Boat? Bring your boat to the current MasterCraft Level with the Domed Molded MasterCraft Boats Logo Decal.64" LongDecals are sold...
    Qty in Cart: 0
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    $299.99 - $449.99
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  • HO Sports Skier Down Flag

    HO Sports Skier Down Flag

    HO Sports
    MSRP: $15.00
    $9.99
    HO Sports Skier Down Flag The best part about watersports is doing it again next weekend. Stay safe with a Skier Down flag. Communicate with other boats that there is a waterskier, wakeboarder, or wakesurfer in the water and ensure that our watersports...
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    MSRP: $15.00
    $9.99
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  • Ronix 6' Adjustable Webbing Bungee Boat Dock Tie (Black)

    Ronix 6' Adjustable Webbing Bungee Boat Dock Tie (Black)

    Ronix
    $49.99
    Ronix 6' Adjustable Webbing Bungee Boat Dock Tie The Ronix 6' Adjustable Webbing Bungee Dock Tie provides a strong, flexible, and secure solution for docking your boat. Designed for convenience and durability, this dock tie helps absorb boat movement...
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    $49.99
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  • Skylon Skylon Tube Clamp Adapters - Pair - [White] Skylon Skylon Tube Clamp Adapters - Pair - [White] 2

    Skylon Skylon Tube Clamp Adapters - Pair - [White]

    Skylon
    $500.00
    Skylon Tube Clamp Adapters - Pair (P&S) The Skylon Tube Clamp Adapters make it easy to mount Skylon swivel board racks to just about any wake tower. Designed as a clean, secure transition point, these adapters bolt directly onto your existing tower...
    Qty in Cart: 0
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    $500.00
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  • Skylon Skylon Tube Clamp Adapters - Pair - [Black] Skylon Skylon Tube Clamp Adapters - Pair - [Black] 2

    Skylon Skylon Tube Clamp Adapters - Pair - [Black]

    Skylon
    $500.00
    Skylon Tube Clamp Adapters - Pair (P&S) The Skylon Tube Clamp Adapters make it easy to mount Skylon swivel board racks to just about any wake tower. Designed as a clean, secure transition point, these adapters bolt directly onto your existing tower...
    Qty in Cart: 0
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    $500.00
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  • Skylon Chaparral EFX Tower Adapters - Pair - [White] Skylon Chaparral EFX Tower Adapters - Pair - [White] 2

    Skylon Chaparral EFX Tower Adapters - Pair - [White]

    Skylon
    $290.00
    Skylon Chaparral EFX Tower Adapters - Pair (P&S) The Chaparral EFX Tower Adapters are designed to make adding Skylon swivel board racks to your Chaparral EFX tower simple and secure. These adapters bolt directly to the factory hole pattern, creating...
    Qty in Cart: 0
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    $290.00
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  • Skylon Centurion DropZone Tower Adapters - Pair - 2019-Current [White] Skylon Centurion DropZone Tower Adapters - Pair - 2019-Current [White] 2

    Skylon Centurion DropZone Tower Adapters - Pair - 2019-Current [White]

    Skylon
    $290.00
    Skylon Centurion DropZone Tower Adapters - Pair (P&S) The Skylon Centurion DropZone Tower Adapters are designed to make mounting Skylon swivel board racks to the Centurion DropZone Tower clean and straightforward. Built for a precise, tower-specific...
    Qty in Cart: 0
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    $290.00
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  • Skylon ATX Type-E Tower Adapters - Pair - 2022-Current [Black] Skylon ATX Type-E Tower Adapters - Pair - 2022-Current [Black] 2

    Skylon ATX Type-E Tower Adapters - Pair - 2022-Current [Black]

    Skylon
    $290.00
    Skylon ATX Type-E Tower Adapters - Pair (P&S) The Skylon ATX Type-E Tower Adapters are the clean, purpose-built solution for mounting Skylon swivel board racks to ATX Type-E towers. Designed as a direct transition piece, these adapters bolt straight...
    Qty in Cart: 0
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    $290.00
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  • Skylon Tige Alpha E2 / M2 Tower Adapters - Pair - 2017-2022 [Black] Skylon Tige Alpha E2 / M2 Tower Adapters - Pair - 2017-2022 [Black] 2

    Skylon Tige Alpha E2 / M2 Tower Adapters - Pair - 2017-2022 [Black]

    Skylon
    $290.00
    Skylon Tige Alpha E2 & M2 Tower Adapters - Pair (P&S) The Skylon Tige Alpha E2 & M2 Tower Adapters are built to provide a clean, secure mounting solution for Skylon swivel board racks on Tige Alpha E2 and M2 towers. Designed for a precise,...
    Qty in Cart: 0
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    $290.00
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  • Skylon ATX Type-E Tower Adapters - Pair - 2022-Current [White] Skylon ATX Type-E Tower Adapters - Pair - 2022-Current [White] 2

    Skylon ATX Type-E Tower Adapters - Pair - 2022-Current [White]

    Skylon
    $290.00
    Skylon ATX Type-E Tower Adapters - Pair (P&S) The Skylon ATX Type-E Tower Adapters are designed to make adding Skylon swivel board racks to ATX Type-E Towers clean and straightforward. Built for a precise, tower-specific fit, these adapters create a...
    Qty in Cart: 0
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    $290.00
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  • Skylon Tige Alpha E2 / M2 Tower Adapters - Pair - 2017-2022 [White] Skylon Tige Alpha E2 / M2 Tower Adapters - Pair - 2017-2022 [White] 2

    Skylon Tige Alpha E2 / M2 Tower Adapters - Pair - 2017-2022 [White]

    Skylon
    $290.00
    Skylon Tige Alpha E2 & M2 Tower Adapters - Pair (P&S) The Skylon Tige Alpha E2 & M2 Tower Adapters are built to provide a clean, secure mounting solution for Skylon swivel board racks on Tige Alpha E2 and M2 towers. Designed for a precise,...
    Qty in Cart: 0
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    $290.00
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  • Skylon Spring Lock Board Racks Mastercraft - Pair - 2012-Current [White] Skylon Spring Lock Board Racks Mastercraft - Pair - 2012-Current [White] 2

    Skylon SpringLock Board Racks Mastercraft - Pair - 2012-Current [White]

    Skylon
    $2,000.00
    Skylon SpringLock Spring Loaded Board Racks for MasterCraft Towers - Pair (P&S) The Skylon SpringLock Spring Loaded Board Racks for MasterCraft Towers are designed as a direct replacement for factory MasterCraft board racks, bringing modern security...
    Qty in Cart: 0
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    $2,000.00
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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.