Inboard Boat Parts

Get the performance and reliability your inboard boat demands with premium replacement parts from WaterSkis.com. Whether you’re maintaining a MasterCraft, Supra, or Moomba boat, we offer a wide selection of genuine and OEM-compatible inboard boat parts to keep your engine, drivetrain, and cooling systems running strong.

From impellers and ignition components to thermostats and transmission parts, every item in this category is curated for quality, compatibility, and long-lasting performance. Not sure where to start? Use our Boat Part Lookup Tool to instantly find the exact part you need for your specific make, model, and engine configuration.

At WaterSkis.com, we know your time on the water matters. That’s why we make it easy to find the right boat parts—fast, accurate, and backed by real-world expertise.


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  • Dual Battery Switch 4-Post

    Dual Battery Switch 4-Post

    MasterCraft
    $146.99
    Dual Battery Switch 4-Post Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
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    $146.99
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  • MasterCraft Fast Fill Ballast Impeller - 30 GPM MasterCraft Fast Fill Ballast Impeller - 30 GPM

    MasterCraft Fast Fill Ballast Impeller - 30 GPM

    MasterCraft
    $86.99
    MasterCraft Fast Fill Ballast Impeller - 30 GPM Replacement ballast Impeller for use with the optional Fast Fill Ballast Pumps in MasterCraft Boats. MasterCraft Fast Fill Ballast Impeller - 30 GPM are found in XT and X-Series boats with the Fast Fill...
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    $86.99
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  • MasterCraft Ballast Impeller STD - Orange 13.7 GPM Ballast Impeller STD - Orange 13.7 GPM

    Ballast Impeller STD - Orange 13.7 GPM

    MasterCraft
    $69.99
    Ballast Impeller STD - Orange 13.7 GPM Replacement ballast Impeller for use with Ballast Pumps in MasterCraft Boats. Orange Ballast impellers are designed for ballast systems found in XT and XSeries boats without the FastFill option. They feature a...
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  • Bilge Pump - 750GPH Ultra (300109B) Bilge Pump - 750GPH Ultra (300109B)

    Bilge Pump - 750GPH Ultra

    MasterCraft
    $0.00
    Bilge Pump - 750GPH Ultra This bilge pump has been discontinued and has been replaced with this bilge pump - https://waterskis.com/bilge-pump-rule-800gph/ Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
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  • Supra & Moomba Rear Drain Plug Rear Drain Plug Assembly

    Rear Drain Plug Assembly

    Skiers Choice
    $19.99
    Supra & Moomba Rear Drain Plug Lost your Brass Rear Supra & Moomba Rear Drain Plug?
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    $19.99
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  • MasterCraft OEM MMDC Box all Models 2002-2004 MasterCraft OEM MMDC Box all Models 2002-2004

    MasterCraft OEM MMDC Box all Models 2002-2004

    $3,999.99
    MasterCraft OEM MMDC Box all Models 2002-2004 Gauges not working after the winter or a cold snap? Your MMDC box is most likely the problem. Replace your MasterCraft MMDC Box and get everything back to working! This MasterCraft MMDC Box is direct from...
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    $3,999.99
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  • MasterCraft Boats Flexor Chrome Transom Decal - Wakeboard Edition

    MasterCraft Boats Flexor Chrome Transom Decal - Wakeboard Edition

    MasterCraft
    $264.99
    MasterCraft Boats Transom Decal MasterCraft OEM "Wakeboard Edition" decal. For most X-Series MasterCraft Boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
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    $264.99
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  • MasterCraft Toggle Switch Red LED 2 Position 3 Prong MasterCraft Toggle Switch Red LED 2 Position 3 Prong

    MasterCraft Toggle Switch Red LED 2 Position 3 Prong

    MasterCraft
    $22.99
    MasterCraft Toggle Switch Red LED 2 Position 3 Prong MasterCraft Toggle Switch with Red LED. This is a 2 position MasterCraft switch with 3 prongs used where a basic (ON/OFF) switch is required such as MasterCraft accessory, accessory 1, blower and tower...
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    $22.99
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  • MasterCraft Bow Hatch 30# Gas Strut

    MasterCraft Bow Hatch 30# Gas Strut

    MasterCraft

    $14.99
    MasterCraft Bow Hatch 30# Gas Strut Gas strut from MasterCraft Boats used on many MasterCraft boats pickle fork bow hatch. This gas shock has 30lbs of pressure and measures 7.5" in length. Use the boat part look up below to ensure you are purchasing the...
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    $14.99
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  • Speedometer Pitot Tube

    Speedometer Pitot Tube

    Northern Wholesale
    MSRP: $19.99
    $16.95
    Speedometer Pitot Tube Slotted mounting plate allows for easy installation of this competitive Pitot Tube in the existing holes on your boat. This part will replace your broken Air Guide pitot tube that is no longer available. Best of all this Pitot tube...
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    MSRP: $19.99
    $16.95
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  • PTM Edge Elite Mirror PTM Edge Elite Mirror

    PTM Edge Elite Mirror

    PTM Edge
    $529.99
    PTM Edge Elite Mirror The PTM Edge Elite Mirror is the perfect mirror for all of your watersports needs. This mirror provides uninterrupted, high-definition, and high-clarity view of the rider from port to starboard. The PTM Edge Elite Mirror features...
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    $529.99
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  • MasterCraft Boats Chrome Transom Decal 20"

    MasterCraft Boats Chrome Transom Decal 20"

    $469.99
    MasterCraft Boats Chrome Decal 20" Whither you are looking to update your old boat or just add a bit of flash to your new boat, the MasterCraft Chromex decal is the perfect fit. Since the Chromex decal comes in three different sizes, it can be used to...
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    $469.99
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  • MasterCraft ProStar Glove Box Latch

    MasterCraft ProStar Glove Box Latch

    MasterCraft

    MSRP: $54.99
    $49.99
    MasterCraft ProStar Glove Box Latch This is a direct replacement MasterCraft ProStar Glove Box Latch for your MasterCraft boat. Keep your MasterCraft boat looking in peak condition with Genuine MasterCraft parts. This latch fits the following MasterCraft...
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    MSRP: $54.99
    $49.99
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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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  • 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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  • 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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  • 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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At WaterSkis.com, we combine deep product knowledge with industry-leading tools to help boat owners find the exact inboard boat parts they need. Whether you're working on a MasterCraft, Supra, or Moomba, our parts deliver the fit and reliability you can trust.

Use our Boat Part Lookup Tool to simplify your search, or explore related categories like cooling systems, engine components, and ignition parts. We’ve got everything you need to keep your boat running at its best.