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 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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  • Ramp-N-Clamp 500M Ramp-N-Clamp 500M

    Ramp-N-Clamp Automatic Boat Latch

    Ramp-N-Clamp

    $249.99
    Ramp-N-Clamp Automatic Boat Latch No more wet feet and no more ramp delays while you crank your boat onto your trailer. Ramp-N-Clamp allows you to simply drive your boat onto your trailer and the bow-eye contacts the latch, automatically...
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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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  • 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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    $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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  • MasterCraft Boats 46 Inch Logo Decal MasterCraft Boats 46" Decal

    MasterCraft Boats 46" Decal

    MasterCraft
    $399.99 - $949.99
    MasterCraft Boats 46 Inch Logo Decal This is for one 46" long OEM MasterCraft Decal. These decals are the stock decal on MasterCraft boats between 2014-2016. The decal is offered in 5 colors (Black Satin, Chrome Satin, Mediterranean Blue, Viper Red, and...
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  • MasterCraft Toggle Switch Satin Nut

    MasterCraft Toggle Switch Satin Nut

    MasterCraft
    MSRP: $4.99
    $2.99
    MasterCraft Boats Toggle Switch Satin Nut Replace your lost or missing MasterCraft Toggle Switch Satin Nut to keep your switch tightly secured to the dash. Midwest MasterCraft proudly stocks MasterCraft boat parts for all of your boating needs.
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    MSRP: $4.99
    $2.99
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  • Ilmor O2 Sensor Downstream | MV8V-1018 Ilmor O2 Sensor Downstream | MV8V-1018

    Ilmor O2 Sensor Downstream | 1018

    Ilmor
    $210.99
    Ilmor O2 Sensor Downstream | MV8V-1018 Ilmor specified oxygen sensor is the recommended replacement for your Ilmor engine. The sensors provide special feedback to your engine’s exhaust system by measuring the proportion of oxygen in the exhaust...
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    $210.99
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  • Ilmor Spark Plug Wire Set | PL00224 Ilmor Spark Plug Wire Set | PL00224

    Ilmor Spark Plug Wire Set | PL00224

    Ilmor
    $74.99
    Ilmor Spark Plug Wire Set | PL00224 Ilmor’s spark plug wire set consists of a set of 8 wires, encased in a premium insulating material, connectors, and insulating boots and are the high-quality and trusted replacement for your Ilmor engine. Ilmor...
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  • Long Flexible Funnel

    Long Flexible Funnel

    $11.99
    Long Flexible Funnel For Oil and Transmission Fluid Long Flexible Funnel Fine mesh screen filters out most foreign matter. Non splashing. Lightweight floating polyethylene plastic. Makes putting oil and transmission fluid into hard to reach places a...
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  • Chrome MasterCraft Gas Cap

    Chrome MasterCraft Gas Cap by Perko

    $72.99
    Chrome MasterCraft Gas Cap Replace your lost, stolen or just old MasterCraft gas cap. This is a stock MasterCraft Gas Cap replacement for all boats. Featuring a standard two prong key open close with connecting holding chain to ensure you don't drop it...
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    $72.99
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  • 17' Rotary Steering Cable

    17' Rotary Steering Cable

    SeaStar Solutions
    $199.99
    17' MasterCraft Rotary Steering Cable When the steering on your boat gets stiff it's time to replace the steering cable. This 17' Steering cable is a direct replacement for Many MasterCraft boats. A new steering cable helps keep your boat operating in...
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  • Indmar Spark Plug Wire Set | 755007

    Indmar Spark Plug Wire Set | 755007

    Indmar
    $128.99
    Indmar Spark Plug Wire Set | 755007 Get the spark your engine needs with new spark plug wire set. Fits Indmar Ford 351w, 302 (5.8, 5.0) Spark Plug Wire Set, based small blocks with either a Prestolite or a Mallory distributor. Complete set of 9 wires...
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  • MasterCraft Circuit Breaker 15 Amp

    MasterCraft Circuit Breaker 15 Amp

    MasterCraft
    MSRP: $19.99
    $16.99
    Genuine MasterCraft boats 15 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 stocks MasterCraft boat parts for...
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    MSRP: $19.99
    $16.99
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  • Ilmor Raw Water Pump | MV8V-1072

    Ilmor Raw Water Pump | MV8V-1072

    Ilmor

    $449.99
    Ilmor Raw Water Pump – MV8V‑1072 The Ilmor Raw Water Pump Assembly (MV8V‑1072) is an OEM replacement component engineered for Ilmor’s open-cooled MV8 marine engines (excluding 7.4L models). Designed to deliver consistent sea water flow to...
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  • MasterCraft Courtesy Utility Light MasterCraft Courtesy Utility Light

    MasterCraft Courtesy Utility Light

    MasterCraft
    $41.99
    MasterCraft Courtesy Light Replacement interior courtesy light for MasterCraft boats. This light uses a 4 hole bolt pattern for installation. Commonly found in MasterCraft boats along the seat base or interior locations.   This part was commonly...
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    $41.99
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  • 22' Rotary Steering Cable

    22' Rotary Steering Cable

    SeaStar Solutions
    $295.99
    22' Rotary Steering Cable When the steering on your boat gets stiff it's time to replace the steering cable. This 22' Steering cable is a direct replacement for several MasterCraft boats produced until 1990. A new steering cable helps keep your boat...
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    $295.99
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  • MasterCraft Toggle Switch Red LED 3 Position 5 Prong MasterCraft Toggle Switch Red LED 3 Position 5 Prong

    MasterCraft Toggle Switch Red LED 3 Position 5 Prong

    MasterCraft
    $30.99
    MasterCraft Toggle Switch Red LED 3 Position 5 Prong MasterCraft Toggle Switch with Red LED. This is a 3 position MasterCraft switch with 5 prongs used where a basic (ON/OFF/ON) switch is required such as MasterCraft ballast toggle switches. This switch...
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    $30.99
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  • DetMar 3" Bilge Blower DetMar 3" Bilge Blower

    DetMar 3" Bilge Blower

    $49.99
    DetMar 3" Bilge Blower Keep your boat’s engine compartment and bilge area free of flammable fumes and excess moisture with the DetMar 3" Bilge Blower. Designed for reliable, continuous-duty operation in harsh marine environments, this compact...
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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.