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 Oil Cap For Steel Valve Covers Indmar Oil Cap For Steel Valve Covers

    Indmar Oil Cap For Steel Valve Covers

    Indmar
    $29.99
    Indmar Oil Cap For Steel Valve Covers Proper maintenance ensures that your boat performs in peak condition year after year. Indmar Engines offers this replacement oil cap for engines using steel valve covers and a threaded oil cap. Please note this oil...
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    $29.99
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  • MasterCraft Circuit Breaker 7 Amp

    MasterCraft Circuit Breaker 7 Amp

    MasterCraft
    MSRP: $19.99
    $16.99
    MasterCraft Circuit Breaker 7 Amp Genuine MasterCraft boats 7 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 proudly...
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    MSRP: $19.99
    $16.99
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  • Johnson Raw Water Pump Cover Plate Screw Johnson Raw Water Pump Cover Plate Screw

    Johnson Cover Plate Screw

    Indmar
    $9.99
    Johnson Raw Water Pump Cover Plate Screw The Johnson Raw Water Pump Cover Plate Screw fits almost all Indmar marine engines (Malibu, Supra, Moomba, etc.) and almost every MasterCraft produced from 1987 until the change to Ilmor engines in 2011. 5/16...
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    $9.99
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  • Center Drain Plug Assembly W/T-Handle Center Drain Plug Assembly W/T-Handle

    Center Drain Plug Assembly W/T-Handle

    Skiers Choice
    $42.99
    MasterCraft, Supra, Moomba Center Drain Plug Assembly W/T-Handle This MasterCraft, Supra, Moomba T Handle Boat Bilge Drain Plug is made of brass for long lasting durability in a marine environment and is a direct factory replacement for MasterCraft boats...
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    $42.99
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  • Johnson Raw Water Pump Cover Plate

    Johnson Raw Water Pump Cover Plate

    Indmar
    $59.99
    Johnson Raw Water Pump Cover Plate The Johnson Raw Water Pump Cover Plate fits almost all Indmar marine engines (Malibu, Supra, Moomba, etc.) and almost every MasterCraft produced from 1987 until the change to Ilmor engines in 2011. The Johnson Raw Water...
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    $59.99
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  • MasterCraft Muffler | 3.5" Inlet/Outlet- Vertical Port MasterCraft Muffler | 3.5" Inlet/Outlet- Vertical Port

    MasterCraft Muffler | 3.5" Inlet/Outlet- Vertical Port

    MasterCraft
    $599.99
    MasterCraft Muffler | 3.5" Inlet/Outlet- Vertical Port This is a genuine replacement fiberglass muffler for many MasterCraft boats. This is a single muffler for the Port Side of the boat on boats outfitted with a port and starboard side muffler. Use of...
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    $599.99
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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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  • 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
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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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    $54.99
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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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    $2.99
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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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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.