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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 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...
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    $23.99
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  • Ilmor Raw Water Pump Impeller (Closed Cooled and 7.4L)

    Ilmor Raw Water Impeller | PV06765

    Ilmor
    $64.99
    Ilmor Raw Water Pump Impeller (Closed Cooled and 7.4L) This Ilmor genuine impeller kit is made from top quality materials specifically formulated to provide peak performance for use in your Ilmor...
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    $64.99
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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...
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    $199.99
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  • MasterCraft Trailer Lights LED (Red)

    MasterCraft Trailer Lights (Red)

    MasterCraft
    MSRP: $34.99
    $19.99
    MasterCraft Trailer Lights LED (Red) ***LIGHT ONLY, NO GROMMET INCLUDED*** MasterCraft LED Trailer Lights will not only outlast the traditional style they are brighter providing a safer driving...
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    MSRP: $34.99
    $19.99
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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!...
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    $3,999.99
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  • Rotor (86-Older) Prestolite

    Rotor (86-Older) Prestolite

    Indmar
    $16.99
    Rotor (86-Older) Prestolite Fits Ford and GM based V8 engines 1986 and older with a Prestolite distributor. Rotor only.Note: There were a FEW 1987 boats built that had the "old" CLIP-ON type...
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    $16.99
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  • Indmar 160 Degree Thermostat LT1 Indmar 160 Degree Thermostat LT1

    Indmar 160 Degree Thermostat LT1

    Indmar
    $62.99
    Indmar 160 Degree Thermostat LT1 Indmar 160 degree thermostat for Corvette LT-1 engines. This thermostat features two small holes that are drilled through to allow air to pass through the thermostat...
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    $62.99
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  • Ilmor Manifold Air Temp Sensor (MAT Sensor)| MV8V-105 Ilmor Manifold Air Temp Sensor (MAT Sensor)| MV8V-105

    Ilmor Manifold Air Temp Sensor | 1052

    Ilmor
    $37.99
    Ilmor Manifold Air Temp Sensor (MAT Sensor)| MV8V-1052 Ilmor MAT Sensor for MasterCraft boats. Specifically designed by Ilmor and MasterCraft for 5.7L 6.0L 6.2L Ilmor engines.  Tisi part cannot be...
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    $37.99
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  • MasterCraft Fuel Line Disconnect Tool Fuel Line Disconnect Tool

    Fuel Line Disconnect Tool

    OReilly Auto Parts
    $19.99
    MasterCraft Fuel Line Disconnect Tool The Fuel Line Disconnect Tool is an essential part of removing fuel lines from a MasterCraft Fuel Pump!This tool makes quick work of removing the fuel lines from...
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    $19.99
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  • MasterCraft Kill Switch

    MasterCraft Kill Switch

    MasterCraft
    $129.99
    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...
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    $129.99
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  • Prestolite Points

    Prestolite Points

    $33.99
    Prestolite Points Fits all Ford and GM based V8 engines using a Prestolite points distributor. This is the Points only, tune up kits are available for these boat engines as well. These engines were...
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    $33.99
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  • Ilmor Engine Temperature Sensor | MV8V-1190 Ilmor Engine Temperature Sensor | MV8V-1190

    Ilmor Engine Temp Sensor | 1190

    Ilmor
    $42.99
    Ilmor Engine Temperature Sensor | MV8V-1190 Ilmor water temperature sensors are engineered for precision and durability and the highest signal accuracy. Ilmor Engine Temp Sensor for MasterCraft...
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    $42.99
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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...
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    MSRP: $2.99
    $2.50
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  • Indmar Thermostat Gasket Indmar Thermostat Gasket 3 Bolt For 350

    Indmar Thermostat Gasket 3 Bolt For 350

    Indmar
    $4.50
    Indmar Thermostat Gasket This thermostat gasket is commonly used on Indmar 350 block engines including the RTP-1, MCX, Assault and many others. This is a 3 bolt gasket used on the bottom half of the...
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    $4.50
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  • Ilmor Thermostat O-Ring | 2-149-N1470-70

    Ilmor Thermostat O-Ring | 1470-70

    Ilmor
    $1.99
    Ilmor Thermostat Housing O-Ring The Ilmor remote thermostat housing mounting o-ring offers application-specific materials to give you a sealing solution with the performance and durability you can...
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    $1.99
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  • MasterLock-Coupler

    MasterLock-Coupler

    Hannays
    MSRP: $29.99
    $24.99
    Master Lock - Trailer Coupler Lock Protect your trailer! This trailer lock fits UFP and Surge Brake Couplers with a 9/32 diameter.   Use
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    MSRP: $29.99
    $24.99
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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...
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    $20.99
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  • MasterCraft Red Port Side Navigation Light

    Red Port Side Navigation Light

    MasterCraft
    $59.99
    MasterCraft Red Port Side Navigation Light Replacement MasterCraft Red Port Side Navigation Light for use on many MasterCraft boats from 2005 to 2012. This light features a red led display for the...
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    $59.99
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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...
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    $74.99
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  • Ilmor O2 Sensor Upstream | MV8V-1017 Ilmor O2 Sensor Upstream | MV8V-1017

    Ilmor O2 Sensor Upstream | 1017

    Ilmor
    $210.99
    Ilmor O2 Sensor Upstream | MV8V-1017 Ilmor specified oxygen sensor is the recommended replacement for your Ilmor engine. The sensors provide special feedback to your engine’s exhaust system by...
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    $210.99
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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.