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 Engine Tune Up Kit (1986-older)

    MasterCraft Engine Tune Up Kit (1986-older)

    MSRP: $114.99
    $102.99
    MasterCraft Engine Tune Up Kit (1986-older) Is your 1986 and older MasterCraft boat not running that well anymore? Give it a tune up with our specifically designed MasterCraft Tune Up Kit. This kit fits all Fits Ford & GM based V8 engines with...
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    MSRP: $114.99
    $102.99
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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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  • Indmar 160 Degree Thermostat Indmar 160 Degree Thermostat

    Indmar 160 Degree Thermostat

    Indmar
    MSRP: $69.99
    $61.99
    Indmar 160 Degree Thermostat Indmar 160 degree thermostat for GM based 5.0 and 5.7 engines. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
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    MSRP: $69.99
    $61.99
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  • PCM Raw Water Impeller GM 350/454

    PCM Raw Water Impeller GM 350/454

    PCM
    $87.99
    PCM Raw Water Impeller GM 350/454 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 annually to...
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    $87.99
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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 Swim Platform Pins Swim Platform Pins

    Swim Platform Pins

    JR Products
    MSRP: $5.99
    $4.99
    MasterCraft Swim Platform Pins These replacement pins for your removable or folding MasterCraft swim platform are the perfect option whether yours are worn or at the bottom of the lake. These pins have a 1/4" diameter and a 1 3/8" usable length. Zinc...
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    MSRP: $5.99
    $4.99
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  • Ilmor Oil Pressure Sensor | 1013 Ilmor Oil Pressure Sensor | 1013

    Ilmor Oil Pressure Sensor | 1013

    Ilmor
    $105.99
    Ilmor Oil Pressure Sensor | MV8V-1013 Ilmor Oil Pressure Sensor for MasterCraft boats. Specifically designed by Ilmor and MasterCraft for Ilmor engines. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
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    $105.99
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  • Rotor GM Gen 2 HEI Distributor

    Rotor GM Gen 2 HEI Distributor

    $14.99
    Rotor GM Gen 2 HEI Distributor Fits GM based engines using Delco HEI Distributor Rotor. Generally, from 1994 to 2004. Like Indmar 5.7 310hp carb., MasterCraft TBI, early MasterCraft MCX, Malibu Monsoon, Assault, Apex, Pro Ski EFI. Rotor only.These...
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    $14.99
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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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  • MasterCraft Trailer Winch Strap MasterCraft Trailer Winch Strap

    MasterCraft Trailer Winch Strap

    MasterCraft
    $32.99
    MasterCraft Trailer Winch Strap Replace your worn or broken trailer winch strap with this 2" x 20' strap with eye hook. Works with most winches including those on MasterCraft trailers. Includes bow eye hook. Breaking strength: 4000lb/1814kgWorking Load...
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    $32.99
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  • Sale 11%
    Babes Odor Oust 16oz

    Babes Odor Oust 16oz

    Babes Boat Care
    $10.00
    $8.90
    BABE'S Odor Oust Odor Neutralizer BABE'S Odor Oust is designed to eliminate odors, not cover them up. The odor neutralizers in Odor Oust bind with odor molecules to remove them from the air. The light fragrance in Odor Oust leaves a fresh scent. Odor...
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    $10.00
    $8.90
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  • MasterCraft MDC Box (1999 - 2001) MasterCraft OEM MDC Box all Models 1999-2001

    MasterCraft OEM MDC Box all Models 1999-2001

    MasterCraft
    $999.99
    MasterCraft MDC Box (1999 - 2001) Are all of your gauges not working after the winter or a cold snap in your 1999 to 2001 MasterCraft Boat? Your MDC box is most likely the problem. Replace your MasterCraft MDC Box and get everything back to working! This...
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    $999.99
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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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  • Fly High Stainless Steel Pylon Extension 1 Fly High Stainless Steel Pylon Extension 2

    Fly High Stainless Steel Pylon Extension

    Fly High
    $1,053.99
    Fly High Stainless Steel Pylon Extension If you have a direct drive boat that you want to outfit for better wakeboarding, the Fly High Stainless Steel Extended Pylon is the best pylon extension money can buy. This pylon extension also features a slalom...
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    $1,053.99
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  • Indmar Thermostat Gasket

    Indmar Thermostat Gasket 3 Bolt Older Style

    Indmar
    $5.00
    Indmar Thermostat Gasket This thermostat gasket is commonly used on many late 80's to early 90's Indmar engines. This gasket measures 3 3/8" across (at the widest point) and 4 1/4" long. This part is commonly found in MasterCraft, Supra, Moomba and Malbu...
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    $5.00
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  • GM Pre-Vortec Marine Spark Plugs

    GM Pre-Vortec Marine Spark Plugs

    $47.99
    GM Pre-Vortec Marine Spark Plugs Fits GM based pre-Vortec engines used by Indmar and PCM from 1997 and earlier. Carbureted and EFI's. These engines were run in many MasterCraft, Supra, Moomba and Malibu boats. Midwest MasterCraft is proud to offer tune...
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    $47.99
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  • Indmar Distributor Cap GM Gen 2 HEI

    Indmar Distributor Cap GM Gen 2 HEI

    $45.99
    Indmar Distributor Cap GM Gen 2 HEI The Indmar Distributor Cap GM Gen 2 HEI fits GM based engines using Delco Gen 2 HEI distributor. Generally, from 1994 to 2004. Like Indmar 5.7 310hp carb., TBI, early MCX, Monsoon, Assault, Apex, Pro Ski EFI. Has brass...
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    $45.99
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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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  • 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 engine. Kit includes: impeller, gasket and o-ring. ...
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    $64.99
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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.