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 Replacement hard tank 90 degree threaded fitting

    MasterCraft Replacement hard tank 90 degree threaded fitting

    MasterCraft
    $7.99
    MasterCraft Ballast Tank 90 Degree fitting Threaded to fit into your existing hard tank. Great to use when adding extra ballast on top of hard tanks. Barbed end to fit 1" black ballast hose of MasterCraft boats. Use the boat part look up below to...
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    $7.99
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  • MasterCraft Toggle Switch Blue LED 3 Position 8 Prong MasterCraft Toggle Switch Blue LED 3 Position 8 Prong

    MasterCraft Toggle Switch Blue LED 3 Position 8 Prong

    MasterCraft
    $50.99
    MasterCraft Toggle Switch Blue LED 3 Position 8 Prong MasterCraft Toggle Switch with blue LED. This is a 3 position MasterCraft switch with 8 prongs used where a 3 position (ON/OFF/ON) switch is required such as 2006 MasterCraft ballast, navigation and...
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    $50.99
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  • MasterCraft Glove Box Hinge MasterCraft Glove Box Hinge

    MasterCraft Glove Box Hinge

    MasterCraft

    $43.99
    MasterCraft Glove Box Hinge These replacement MasterCraft Glove Box Hinges feature a 4 hole mounting pattern with an adjustable friction adjustment. friction is adjustable via the top mounted screw allowing you to properly set the hinge preventing the...
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    $43.99
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  • Ford Oil Filter for Indmar & PCM

    Ford Oil Filter

    Indmar
    $14.99
    Ford Oil Filter for Indmar & PCM Fits all Ford based 351 & 302 (5.8 & 5.0) Ford Marine engines. Marine engines should get an oil and filter change every 50 hours of run time. Keep your Ford based marine engine running at peak performance with...
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  • Sale 6%
    Babes Boat Bubbles

    Babes Boat Bubbles

    Babes Boat Care
    $10.00
    $9.40
    Babes Boat Bubbles BABE'S Boat Bubbles is an easy to use, high-sudsing boat wash concentrate. Formulated specifically for gelcoat, Boat Bubbles washes away the grime and marine build-up. It will not to strip away wax or sealants. Boat Bubbles is pH...
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    $10.00
    $9.40
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  • Gas Shock 60# Sundeck and Trunk

    Gas Shock 60# Sundeck and Trunk

    MasterCraft
    MSRP: $19.99
    $14.99
    Gas Shock 60# Sundeck and Trunk Gas strut from MasterCraft Boats used on many MasterCraft boats side sundeck, trunk and ski storage areas. This shock features 60lbs of lift strength and is 15" in length making it the perfect fit for many MasterCraft...
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    MSRP: $19.99
    $14.99
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  • Indmar 140 Degree Thermostat Indmar 140 Degree Thermostat

    Indmar 140 Degree Thermostat

    Indmar
    $54.99
    Indmar 140 Degree Thermostat Indmar 140-degree thermostat. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
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  • Indmar Engine Block Plug

    Indmar Engine Block Plug

    Indmar
    $2.99
    Indmar Engine Block Plug Indamr Brass engine block plug from Indmar Marine engines. This is a 1/4 plug with hex head. Replace your worn block plug(s) regularly to speed up engine block drain time, winterization and more. Please note some engines may have...
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  • Ilmor Ignition Coil Assembly | 1142 Ilmor Ignition Coil Assembly | 1142

    Ilmor Ignition Coil Assembly | 1142

    Ilmor
    $179.99
    Ilmor Ignition Coil Assembly - MV8V-1142 Maintain like-new performance for your Ilmor engine with these Ilmor specified ignition coils. These coils are designed as a direct replacement for your OEM coils. Ilmor IGN Coil ASSEM for MasterCraft boats...
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    $179.99
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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...
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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;...
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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...
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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...
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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...
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  • Sale 10%
    Radar 6ft Adjustable Webbing Bungee (Black) Boat Dock Tie

    Radar 6ft Adjustable Webbing Bungee (Black) Boat Dock Tie

    Radar
    MSRP: $49.99
    $49.99
    $44.99
    Radar adjustable webbing & bungee dock line. Adjusts 3' to 6'. A must-have boating accessory that always comes in handy. Grab more than one.
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    MSRP: $49.99
    $49.99
    $44.99
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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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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.