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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  • Prop Shaft Cotter Pin Prop Shaft Cotter Pin

    Prop Shaft Cotter Pin

    OJ Props
    MSRP: $3.50
    $1.99
    Propeller Shaft Cotter Pin The Cotter Pin helps ensure that you don't lose your boats propeller and prop nut. Replace the cotter pin every time you change out your boat prop to ensure that you never get stranded on the lake, or worse lose your costly...
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    MSRP: $3.50
    $1.99
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  • MasterCraft Strut for Boats with 1" Drive Shaft MasterCraft 1" Strut

    MasterCraft 1" Strut

    $499.99
    MasterCraft Strut for Boats with 1" Drive Shaft The MasterCraft strut is a genuine MasterCraft boat part for boats with a 1" keyed drive shaft. This strut is specifically designed for MasterCraft direct drive boats with a 1:1 transmission. This...
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    $499.99
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  • Prop Key for Keyed Drive Shaft Prop Key for Keyed Drive Shaft

    Prop Key 1/4" x 1 1/4"

    OJ Props
    MSRP: $9.99
    $8.99
    Prop Key 1/4" x 1 1/4" Don't be caught on the lake without a spare Prop Key 1/4" x 1 1/4" This is too important of a piece to be without and let's face it, there is no way to look cool while stranded on the lake. This is a universal part it works on most...
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    MSRP: $9.99
    $8.99
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  • Indmar Knock Sensor Indmar Knock Sensor

    Indmar Knock Sensor

    Indmar
    $159.99
    Indmar Knock Sensor Genuine Indmar Knock Sensor. This part is commonly found in Indmar engines in MasterCraft, Malibu, Supra and Moomba boats. This part threads into the block and features a wire harness connector at the other end. Use the boat part look...
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    $159.99
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  • Gas Shock 30# Motorbox and Engine Cover

    Gas Shock 30# Motorbox and Engine Cover

    MSRP: $19.99
    $14.99
    Gas Shock 30# Motorbox and Engine Cover Gas strut from MasterCraft Boats used on many MasterCraft boats motorbox and engine covers as well as observers seats. This gas shock is designed to hold up the motorbox cover on your v-drive boat. This gas shock...
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    MSRP: $19.99
    $14.99
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  • Ilmor Ignition Coil Assembly | PV06356 Ilmor Ignition Coil Assembly | PV06356

    Ilmor Ignition Coil Assembly | PV06356

    Ilmor
    $149.99
    Ilmor Ignition Coil Assembly | PV06356 Ilmor Ignition Coil for MasterCraft boats. This is a replacement for Ilmor MV8V-1026. Maintain like-new performance for your Ilmor engine with these Ilmor specified ignition coils. These coils are designed as a...
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    $149.99
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  • 3M 5200 Marine Adhesive Sealant 3oz Tube

    3M 5200 Marine Adhesive Sealant 3oz Tube

    Hannays
    $31.99
    3M 5200 Marine Adhesive Sealant 3oz Tube 3M 5200 Marine Adhesive and Sealant is used when installing new struts or tracking fins. This high strength and white in color. 5200 provides for watertight bonding and sealing of fiberglass and wood. Ideal for...
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    $31.99
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  • MasterCraft Southco Soft Draw Latch

    Southco Soft Draw Latch

    MasterCraft
    MSRP: $39.99
    $32.99
    Southco Soft Draw Latch This latch is a replacement for your MasterCraft engine box.   Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
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    MSRP: $39.99
    $32.99
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  • MasterCraft Circuit Breaker 3 Amp

    MasterCraft Circuit Breaker 3 Amp

    MasterCraft
    MSRP: $19.99
    $16.99
    MasterCraft 3 Amp Circut Breaker Genuine MasterCraft boats 3 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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  • Log Shaft Packing For 1 1/8" Drive Shaft Log Shaft Packing For 1 1/8" Drive Shaft

    Log Shaft Packing For 1 1/8" Drive

    $4.99
    Log Shaft Packing For 1 1/8" Drive Wax impregnated rope for drive shaft and rudder stuffing boxes. Each piece is 3/16 diameter and 4.5" long. The 3/16 shaft packing is designed for boats with a 1 1/8" drive shaft which is commonly found on MasterCraft,...
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    $4.99
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  • Indmar Distributor Cap (87-and newer)

    Distributor Cap (87-Current)

    $82.99
    Indmar Distributor Cap (87-and newer) Fits Ford and GM based V8 engines 1987 and newer with a Prestolite distributor. Cap only. These engines were used by MasterCraft, Malibu, Supra and Moomba boats. This distributor cap screws down (not a clip down cap)...
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    $82.99
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  • MasterCraft ProStar Seat Base Latch Round MasterCraft ProStar Seat Base Latch Round

    MasterCraft ProStar Seat Base Latch Round

    $69.99
    MasterCraft ProStar Seat Base Latch This is a direct replacement seat base storage latch for many of the MasterCraft ProStar boats with a round locking latch. This part includes spare keys, latch and nylock nut. Keep your MasterCraft boat looking in...
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    $69.99
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  • MasterCraft Muffler | 3.5" In w/60° Angle - 3.5" Outlet

    MasterCraft Muffler | 3.5" In w/60° Angle - 3.5" Outlet

    MasterCraft
    $399.99
    MasterCraft Muffler 3.5" For Skier 19 This is a genuine replacement fiberglass muffler for many MasterCraft Skier 19 boats. This muffler was typically used in direct drive boats made from 1998 to 2003 and features a 3.5" in and out. For use with...
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    $399.99
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  • Heavy Duty Trailer Guide Pole Covers Heavy Duty Trailer Guide Pole Covers 1

    Heavy Duty Trailer Guide Pole Covers

    MasterCraft
    $69.99
    MasterCraft Heavy Duty Trailer Guide Pole Covers Keep your trailer guide poles looking new with some MasterCraft heavy duty trailer guide pole covers. Labeled with MasterCraft Boats logo. Sold as a pair.36" Length. Use the boat part look up below to...
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    $69.99
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  • Attwood 4" Bilge Blower

    Attwood 4" Bilge Blower

    MasterCraft
    $46.99
    Attwood 4" Bilge Blower Get the vapors out from under your motor box with a new Attwood 4" Bilge Blower. Patented in-line design provides ventilation for engine compartments, galleys, bilges, and heads. Mounting feet allow vertical or horizontal...
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    $46.99
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  • Boat Bling Vinyl Sauce - 1 Gallon

    Boat Bling Vinyl Sauce - 1 Gallon

    Boat Bling
    $59.99
    Boat Bling Vinyl Sauce Vinyl sauce is perfect for showing your seats some love! Vinyl sauce picks up and removes dirt, scum, grime, and even sunscreen! Simply spray on and wipe clean for fresh and clean looking boat seats! Grab a gallon to keep your...
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    $59.99
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  • MasterCraft Swim Platform Pad

    MasterCraft Swim Platform Pad

    MasterCraft
    $374.99
    MasterCraft Swim Platform Pad This is a OEM MasterCraft Fiberglass Swim Platform Pad that fits some 2007-2012 MasterCraft Boats. Some boats in this age range originally had a black pad but that item is no longer available. This is the replacement for...
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    $374.99
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  • PCM Raw Water Impeller Serpentine Driven PCM Raw Water Impeller Serpentine Driven

    PCM Raw Water Impeller Serpentine Driven

    PCM
    $80.99
    PCM Raw Water Pump Impeller for GM Engines This impeller for your PCM Marine Engine will keep your boat from overheating by properly circulating water through the block and manifolds. We recommend replacing your engine impeller every 100 hours or...
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    $80.99
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  • MasterCraft Start Stop Switch

    MasterCraft Start Stop Switch

    $97.25
    MasterCraft Start Stop Switch Replace your old or worn out switch with this genuine MasterCraft part. Midwest MasterCraft proudly stocks MasterCraft boat parts for all of your boating needs. Use the boat part look up below to ensure you are purchasing...
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    $97.25
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  • MasterCraft X-Series Glove Box Latch

    MasterCraft X-Series Glove Box Latch

    MSRP: $54.99
    $49.99
    MasterCraft Glove Box Latch This is a direct replacement glove box latch for many of the MasterCraft boats. Keep your MasterCraft boat looking in peak condition with Genuine MasterCraft. This latch fits the following MasterCraft boats2006-2010...
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    MSRP: $54.99
    $49.99
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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.