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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  • Black Cupholder

    Black Cupholder

    MasterCraft
    MSRP: $4.99
    $2.99
    Black Cupholder These replacement MasterCraft cupholders feature an easy to install drop in design. Black color matches most interior boat upholstery. These cupholders work in most boats including Malibu, Moomba, Supra and more. Dress up your boats...
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    MSRP: $4.99
    $2.99
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  • MasterCraft 2 Position Rocker Switch MasterCraft 2 Position Rocker Switch

    MasterCraft 2 Position Rocker Switch

    MasterCraft
    $19.99
    MasterCraft 2 Position Rocker Switch Replace your worn or faded MasterCraft dash switches with this 2 position rocker switch. Features ON-OFF capabilities. Easy installation and an exact fit. This switch has 2 positions and uses a 4 prong set up. This...
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    $19.99
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  • Tower Navigation Light Lens Cap Tower Navigation Light Lens Cap

    Navigation Light Lens Cap

    MasterCraft

    MSRP: $19.99
    $14.99
    MasterCraft Tower Navigation Light Cap Replacement MasterCraft Tower Navigation Light Lens Cap for use on MasterCraft towers.  No matter what the reason you tell your buddies as to why the lens cap is missing you need to replace it. This is an exact...
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    MSRP: $19.99
    $14.99
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  • MasterCraft Bow Navigation Light Bow Navigation Light

    Bow Navigation Light

    $69.99
    MasterCraft Bow Navigation Light Replacement MasterCraft Bow Navigation Light for use on most MasterCraft boats from 1968 to 2006. This bow marker light features a green and red display for viability at night and a chrome cover for rugged good looks and...
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    $69.99
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  • MasterCraft Circuit Breaker 20 Amp

    MasterCraft Circuit Breaker 20 Amp

    MasterCraft
    MSRP: $19.99
    $16.99
    MasterCraft 20 Amp Circuit Breaker Genuine MasterCraft boats 20 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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  • MasterCraft Toggle Switch Red LED 3 Position 8 Prong MasterCraft Toggle Switch Red LED 3 Position 8 Prong

    MasterCraft Toggle Switch Red LED 3 Position 8 Prong

    MasterCraft

    $41.99
    MasterCraft Toggle Switch Red LED 3 Position 8 Prong MasterCraft Toggle Switch with red 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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    $41.99
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  • MasterCraft Muffler | 3.5" In w/30° Angle - 3.5" Out w/80° Angle -Vertical MasterCraft Muffler | 3.5" In w/30° Angle - 3.5" Out w/80° Angle -Vertical

    MasterCraft Muffler | 3.5" In w/30° Angle - 3.5" Out w/80° Angle -Vertical

    MasterCraft
    $599.99
    MasterCraft Muffler | 3.5" In w/30° Angle - 3.5" out w/80° Angle - Vertical This is a genuine replacement fiberglass muffler for many MasterCraft boats. This muffler was typically used in V-drive boats made from 2009 to 2011 and features a 3.5"...
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    $599.99
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  • Gas Shock 30# Sun Deck and Engine Cover

    Gas Shock 30# Sun Deck and Engine Cover

    MasterCraft

    MSRP: $19.99
    $12.99
    Gas Shock 30lb Sun Deck and Engine Cover Gas shock from MasterCraft Boats used on several MasterCraft boats for the Sun Deck, and on many boats from 1991-1997 for the Engine Cover. This gas shock has 30lbs of pressure and measures 20" in length.This...
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    MSRP: $19.99
    $12.99
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  • MasterCraft Exhaust Flap Retainer

    MasterCraft Exhaust Flap Retainer

    MasterCraft
    $23.99
    Exhaust Flap Retainer This is a Exhaust Flap Retainer. This retainer is designed to fit a 3.5" Exhaust Flap. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
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    $23.99
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  • MasterCraft Rear Storage Bin Rear Storage Bin

    Rear Storage Bin

    MasterCraft
    $199.99
    MasterCraft Rear Storage Bin This is a MasterCraft factory replacement plastic storage bin normally found under the rear center seat of many older MasterCraft boats. This is a molded plastic storage bin sometimes referred to as a cooler. the Upper "lip"...
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    $199.99
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  • MasterCraft MMDC Box Mini M2

    MasterCraft MMDC Box Mini M2

    $3,999.99
    MasterCraft MMDC Box Mini M2 '07 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 is an OEM MasterCraft specific part. ***Installed...
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    $3,999.99
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  • MasterCraft Kill Switch

    MasterCraft Kill Switch

    MasterCraft
    $131.99
    MasterCraft Kill Switch This Kill Switch is used in MasterCrafts from 2006-Current. It is used in everything from a PS 197 to an X-Star. This switch can also be used in older MasterCraft boats by cutting the connector off and wiring in. Use the boat part...
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    $131.99
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  • Rudder Cotter Pin 2" Long | 3/16

    Rudder Cotter Pin 2" Long | 3/16

    OReilly Auto Parts
    MSRP: $2.99
    $2.50
    Rudder Cotter Pin 2" Long | 3/16 The Rudder Cotter Pin is a small but essential part. Replacing your cotter pin is cheap insurance and should never be overlooked. This is too important of a piece to be with out and letŒÍs face it, there is no way to...
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    MSRP: $2.99
    $2.50
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  • MasterCraft 3 Position Rocker Switch MasterCraft 3 Position Rocker Switch

    MasterCraft 3 Position Rocker Switch

    MasterCraft
    $20.99
    MasterCraft 3 Position Rocker Switch Replace your worn or faded MasterCraft dash switches with this 3 position rocker switch. Features ON-OFF-ON capabilities. Easy installation and an exact fit. This switch has 3 positions and uses a 5 prong set up. This...
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    $20.99
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  • Johnson Bilge Pump 750GPH Johnson Bilge Pump 750GPH

    Johnson Bilge Pump 750GPH

    $74.99
    Johnson Bilge Pump 750GPH This is a universal Johnson Bilge Pump 750GPH. Johnson Pump Pro-Line 12V Bilge Pump features a new efficient motor with greater torque and less amp draw. It can discharge water circulation for cooling and has a tough resin...
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    $74.99
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  • MasterCraft Muffler | 3.5" In w/45° Angle  - 3.5" Out MasterCraft Muffler | 3.5" In w/45° Angle  - 3.5" Out

    MasterCraft Muffler | 3.5" In w/45° Angle - 3.5" Out

    MasterCraft

    $505.99
    MasterCraft Muffler | 3.5" In w/45° Angle - 3.5" Out This is a genuine replacement fiberglass muffler for many MasterCraft boats. This muffler was typically used in direct drive boats made from 1994 to 2000 and features a 3.5" in and out with an...
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    $505.99
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  • MasterCraft Toggle Switch Blue LED 2 Position 3 Prong MasterCraft Toggle Switch Blue LED 2 Position 3 Prong

    MasterCraft Toggle Switch Blue LED 2 Position 3 Prong

    MasterCraft
    $39.99
    MasterCraft Toggle Switch Blue LED 2 Position 3 Prong MasterCraft Toggle Switch Two Position Switch with blue LED. This is a 2 position MasterCraft switch with 3 prongs used where a basic (ON/OFF) switch is required such as 2006 MasterCraft bilge pump...
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    $39.99
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  • MasterCraft Toggle Switch Blue LED 3 Position 5 Prong MasterCraft Toggle Switch Blue LED 3 Position 5 Prong

    MasterCraft Toggle Switch Blue LED 3 Position 5 Prong

    MasterCraft
    MSRP: $59.99
    $52.99
    MasterCraft Blue LED Toggle Switch MasterCraft Toggle Switch with blue LED. This is a 3 position MasterCraft switch with 5 prongs used where a 3 position (ON/OFF/ON) switch is required such as 2006 MasterCraft ballast toggles. This switch is used in many...
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    MSRP: $59.99
    $52.99
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  • Supra Boats Matte Black Transom Decal 36" Supra Boats Matte Black Transom Decal 36"

    Supra Boats Matte Black Transom Decal 36"

    Supra Boats
    $199.99
    Supra Boat Matte Black Transom Decal 36" This 36" Supra Boats Matte Black Transom Decal is an OEM Supra Decal. This 36" Matte Black decal is designed to fit perfectly on your transom. You can also put this on the back window of your truck and show your...
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    $199.99
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  • MasterCraft Swim Platform Pin Stainless Steel MasterCraft Swim Platform Pin Stainless Steel

    MasterCraft Swim Platform Pin Stainless Steel

    MasterCraft

    MSRP: $69.99
    $59.99
    MasterCraft Boats Swim Platform Pin These pins for your removable or folding MasterCraft swim platform are the perfect option whether yours are worn or at the bottom of the lake. Durable Stainless Steel design is superior to coated pins and provides...
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    MSRP: $69.99
    $59.99
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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.