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 Toggle Switch Red LED 2 Position 6 Prong MasterCraft Toggle Switch Red LED 2 Position 6 Prong

    MasterCraft Toggle Switch Red LED 2 Position 6 Prong

    MasterCraft
    $120.99
    MasterCraft Toggle Switch Red LED 2 Position 6 Prong MasterCraft Toggle Switch with Red LED. This is a 2 position MasterCraft switch with 6 prongs used where a basic (ON/OFF) switch is required such as MasterCraft bilge and accessory toggle switches...
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    $120.99
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  • HVS Distributor Cap

    HVS Distributor Cap

    $94.99
    HVS Distributor Cap Fits GM based engines using Delco HVS '05 to current. Like MasterCraft's Indmar RTP and MCX 5.7, Ilmor 5.7 and PCM GM Engines. Cap and new screws only. Color may vary. Be extremely careful loosening and tightening these screws! ...
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    $94.99
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  • Packing Gland Assembly 1 Inch

    Packing Gland Assembly 1 Inch

    $369.99
    Packing Gland For 1" Shaft Replace your boats worn packing gland with this new assembly. Specifically designed for boats with a 1 1/8" drive shaft. Please note this part DOES NOT include log shaft packing, this must be purchased separately This part is...
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    $369.99
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  • Fuel Pump Filter for Millenium Fuel Pumps

    Fuel Pump Filter for Millenium Fuel Pumps

    MasterCraft
    $56.99
    Millenium Fuel Pump Fuel Filter Replace your clogged or damaged fuel filter on MasterCraft Boat with a Millennium style fuel pump. Everything you need to get your engine getting clean fuel again! Please note: No returns will be accepted on installed...
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    $56.99
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  • MasterCraft OEM Strut - 399 MasterCraft OEM Strut - 399

    MasterCraft OEM Strut - 399

    MasterCraft

    $449.99
    MasterCraft OEM Strut - 399 This genuine MasterCraft OEM Strut is model specific. Even a small bend in your strut can cause vibrations and long-term damage to your drive shaft and possibly transmission. If you have a bent strut get your boat dialed back...
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    $449.99
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  • MasterCraft Fuel Sending Unit MasterCraft Fuel Sending Unit with gasket

    MasterCraft OEM Fuel Sender

    MasterCraft
    $199.99
    MasterCraft Fuel Sending Unit Fuel Sending unit for MasterCraft Boats. Replace your old or non-working fuel sending unit and never run out of gas again! Comes complete with installation instructions and replacement cork seal. This is the correct fuel...
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    $199.99
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  • MasterCraft Tower Knob for ZeroFlex 01-04 MasterCraft Tower Knob for ZeroFlex 01-04

    MasterCraft Tower Knob for ZeroFlex 01-04

    MasterCraft

    MSRP: $29.99
    $24.99
    MasterCraft Tower Knob for ZeroFlex Flyer 2001-2004 This part is no longer available from MasterCraft but do not worry because we have sourced a replacement. The new version has a slightly different grip. The Tower knob may be slightly longer than...
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    MSRP: $29.99
    $24.99
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  • Gas Shock 20# Floorboards

    Gas Shock 20# Floorboards

    MasterCraft
    MSRP: $19.99
    $14.99
    Gas Shock 20# Floorboards 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 boat. This gas shock has 20lbs of pressure...
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    MSRP: $19.99
    $14.99
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  • Supra Boats Matte Black Decal 59" Supra Boats Matte Black Decal 59"

    Supra Boats Matte Black Decal 59"

    Supra Boats

    $399.99
    Supra Boat Black Decal 59" Give your Supra Boat an updated look with the Matte Black Decal. The Matte Black decal has raised lettering. This Supra Boats Matte Black Decal 59" is used for both the port and starboard sides of the boat. This is also the...
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    $399.99
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  • PCM Thermostat Gasket PCM Thermostat Gasket

    PCM Thermostat Gasket

    PCM
    $3.99
    PCM Thermostat Gasket This thermostat gasket was commonly found on PCM engines. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
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    $3.99
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  • Indmar 5.7L Spark Plug Wire Set

    Indmar 5.7L Spark Plug Wire Set

    Indmar

    $119.99
    Indmar 5.7L Spark Plug Wire Set Get the spark your engine needs with a new spark plug wire set from MasterCraft. This wire set fits these 2005 and older 5.7L Engines - MCX, RTP-1, and Predator. Please note: No returns will be accepted on installed...
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    $119.99
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  • Supra Boats Chrome Transom Decal 36" Supra Boats Chrome Transom Decal 36"

    Supra Boats Chrome Transom Decal 36"

    Supra Boats
    $199.99
    Supra Boat Chrome Transom Decal 36" This transom decal is an OEM Supra Decal. The Supra Boats Chrome Transom Decal 36" will give your boat a fresh new look. Also fits great in the back window of your tow vehicle! Decal Size 3.2" x 36.36" This decal...
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    $199.99
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  • MasterCraft Circuit Breaker 4 Amp

    MasterCraft Circuit Breaker 4 Amp

    MasterCraft
    MSRP: $19.99
    $16.99
    MasterCraft Circuit Breaker 4 Amp Genuine MasterCraft boats 4 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 Muffler | 3.5" Horizontal W/50° Angle - 3.5" Outlet MasterCraft Muffler | 3.5" Horizontal W/50° Angle - 3.5" Outlet

    MasterCraft Muffler | 3.5" Horizontal W/50° Angle - 3.5" Outlet

    MasterCraft
    $599.99
    MasterCraft Muffler | 3.5" Horizontal W/50° Angle - 3.5" Outlet This is a genuine replacement fiberglass muffler for many MasterCraft ProStar boats. This muffler was typically used in direct drive boats made from 2009 to 2012 and features a 3.5" in and...
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    $599.99
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  • MasterCraft Courtesy Storage Light MasterCraft Courtesy Utility LED Light

    MasterCraft Courtesy Utility LED Light

    MSRP: $19.99
    $16.99
    MasterCraft Courtesy Storage Light Replacement interior storage and courtesy light for MasterCraft boats. This light uses a 2 hole bolt pattern for installation. Bright LED design features 3 LEDs. Commonly found in MasterCraft boats along the cup holder,...
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    MSRP: $19.99
    $16.99
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  • Ilmor Spark Iridium Plug Set (5.7L) | MV8V-1191 Ilmor Spark Iridium Plug Set (5.7L) | MV8V-1191

    Ilmor Spark Iridium Plug Set (5.7L) | 1191

    Ilmor
    $125.99
    Ilmor Spark Iridium Plug Set of 8 (5.7L) | MV8V-1191 Ilmor Spark Plug Set for MasterCraft boats. Specifically designed by Ilmor and MasterCraft for 5.7L Ilmor engines. Use the boat part look up below to ensure you are purchasing the correct part for your...
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    $125.99
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  • Indmar Circulating Water Pump GM LT1 Engines Circulating Water Pump GM LT1 Engines

    Circulating Water Pump GM LT1 Engines

    $299.99
    Indmar MasterCraft LT-1 Circulating Water Pump Water circulating pump for Indmar Corvette LT1 marine engines used in MasterCraft boat. Fits Indmar LT-1 engines used in MasterCraft boats from 1993 to 1999. Comes with mounting gaskets. Please note: No...
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    $299.99
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  • MasterCraft Tower Fingers X-1

    MSRP: $170.00
    $169.99
    MasterCraft Tower Fingers X-1 MasterCraft Tower Fingers for '06 X-1 Please Note: All Wakeboard tower and tower accessories sales are final. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
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    MSRP: $170.00
    $169.99
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  • Circulating Water Pump for GM  5.0 and 5.7 Engines

    Circulating Water Pump GM Engines

    $204.99
    Circulating Water Pump for GM Engines This is a new circulating water pump for Indmar and PCM GM marine engines. This pump fits GM 5.0 and 5.7 Liter small block GM engines. This pump is Standard (LH) rotation. Comes with new mounting gaskets to ensure a...
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    $204.99
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  • Ilmor Spark Iridium Plug Set Ilmor Spark Iridium Plug Set

    Ilmor Spark Iridium Plug Set | 1192

    Ilmor
    $125.99
    Ilmor Spark Iridium Plug Set of 8 | MV8V-1192 Ilmor Spark Plug Set for MasterCraft boats. Specifically designed by Ilmor and MasterCraft for 6.0L & 6.2L Ilmor engines. Use the boat part look up below to ensure you are purchasing the correct part for...
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    $125.99
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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.