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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  • MasterCraft OEM Ballast Water Sender - 268

    MasterCraft
    $199.99
    MasterCraft OEM Ballast Water Sender - 268 If your ballast gauges are no longer reading correct you probably have a bad ballast sender. Use the Parts Finder or the Matrix below to ensure you are getting the correct Ballast Sender for your MasterCraft...
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    $199.99
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  • Ballast Hose 1.5" Inside Diameter

    MasterCraft
    $5.99
    Ballast Hose 1.5" Inside Diameter If you are upgrading to the massive High Flow pumps then you will need the 1.5" inside diameter ballast hose. This is commenly seen in MasterCraft's with the FastFill ballast option. *This item is sold by the foot...
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    $5.99
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  • Ballast Hose 1-1/8" Inside Diameter

    MasterCraft
    $3.49
    Ballast Hose 1 1/8" Inside Diameter Everyone is looking to add extra ballast to their boat to create the ultimate surf wave. The 1 1/8" diameter hose is the most common hose used in replacement ballast as well as new ballast systems. *This item is sold...
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    $3.49
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  • Ballast Hose 3/4" Inside Diameter

    MasterCraft
    $3.49
    Ballast Hose 3/4" Inside Diameter If you are adding additional ballast and need some 3/4" hose look no further. Maybe your ballast hose is broken or cracked and needs replacement. This will also be the same for bilge pumps in certain years, makes and...
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    $3.49
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  • Oneill Psycho Tech 1.5MM Gloves

    O'Neill Psycho Tech Gloves

    ONeill Wetsuits
    $54.95
    O'Neill Psycho Tech Gloves Stay covered Head-to-Toe in O'Neill's premium lineup of equipment designed to shield you from the harshest conditions. Our world-class athletes search the planet for perfect surf, the R&D team at Area 52 developed product...
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    $54.95
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  • Sale 14%
    Oneill Reactor-2 1.5MM Front Zip Neoprene Top Oneill Reactor-2 1.5MM Front Zip Neoprene Top

    O'Neill Reactor Front Zip Neoprene Top

    ONeill Wetsuits
    $89.95
    $76.97
    O'Neill Reactor Front Zip Neoprene Top The newly upgraded REACTOR-2 is engineered for performance in a value driven package. A perfect combination of stretch and durability. Fresh colors and graphics with style that's built to last. Front Zip Combine...
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    $89.95
    $76.97
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  • Sale 38%
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    Oneill Youth Sun Shirt UPF50+ Front Oneill Youth Sun Shirt UPF50+ Back
    img:closeoutbadge2.png

    Oneill Youth Basic Sun Shirt UPF50+ Graphite

    ONeill Wetsuits
    $25.95
    $15.97
    Oneill Youth Basic Sun Shirt UPF50+ Keep the kids protected from the harsh rays with this Sun Shirt. This is a UPF50+ rated shirt to help keep everyone happy and burn free!
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    $25.95
    $15.97
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  • MasterCraft OEM Drive Shaft - 58" - 330 MasterCraft OEM Drive Shaft - 58" - 330

    MasterCraft OEM Drive Shaft - 58" - 330

    MasterCraft
    $939.99
    MasterCraft OEM Drive Shaft - 58" - 330 This drive shaft is measured to be 58inches long by 1-1/8inch in diameter with a 4inch coupler. Comes with a new prop nut and cotter pin.   **The images are of a MasterCraft Drive Shaft, however, the specific...
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    $939.99
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  • MasterCraft OEM Strut - 145 MasterCraft OEM Strut - 145

    MasterCraft OEM Strut - 145

    MasterCraft
    $775.99
    MasterCraft OEM Strut - 145 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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    $775.99
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  • MasterCraft OEM Drive Shaft 45.5" -327 MasterCraft OEM Drive Shaft 45.5" -327

    MasterCraft OEM Drive Shaft 45.5" -327

    MasterCraft
    $339.99
    MasterCraft OEM Drive Shaft 45.5" -327 This genuine MasterCraft drive shaft is 45-1/2 inches long by 1-1/8 inch diameter and is splined. Comes with a new prop nut and cotter pin. Designed for boats with a splined drive shaft.   **The images are of a...
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    $339.99
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  • MasterCraft OEM Drive Shaft 48 1/8" - 321 MasterCraft OEM Drive Shaft 48 1/8" - 321

    MasterCraft OEM Drive Shaft 48 1/8" - 321

    MasterCraft
    $749.99
    MasterCraft OEM Drive Shaft 48 1/8" - 321 This genuine MasterCraft drive shaft is 48-1/8 inches long by 1-1/8 inch diameter and is splined. Comes with a new prop nut and cotter pin. Designed for boats with a splined drive shaft.   **The images are of...
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    $749.99
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  • MasterCraft OEM Drive Shaft 47.5" - 320 MasterCraft OEM Drive Shaft 47.5" - 320

    MasterCraft OEM Drive Shaft 47.5" - 320

    MasterCraft
    $833.99
    MasterCraft OEM Drive Shaft 47.5" - 320 This genuine MasterCraft drive shaft is 47.5 inches long by 1-1/8 inch diameter and is double splined. This drive shaft is specifically designed for MasterCraft Boats. Comes with a new prop nut and cotter pin...
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    $833.99
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  • MasterCraft OEM Drive Shaft 51" - 328 MasterCraft OEM Drive Shaft 51" - 328

    MasterCraft OEM Drive Shaft 51" - 328

    MasterCraft
    $939.99
    MasterCraft OEM Drive Shaft 51" - 328  This genuine MasterCraft drive shaft is 51 inches long by 1-1/8 inch diameter with a 4inch coupler and is double splined. Comes with a new prop nut and cotter pin. Designed for boats with a splined drive shaft...
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    $939.99
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  • MasterCraft OEM Drive Shaft 49.5" - 323 MasterCraft OEM Drive Shaft 49.5" - 323

    MasterCraft OEM Drive Shaft 49.5" - 323

    MasterCraft
    $1,049.99
    MasterCraft OEM Drive Shaft 49.5" - 323  This genuine MasterCraft drive shaft is 49 and one half inches long by 1-1/8 inch diameter and is double splined. Comes with a new prop nut and cotter pin. Designed for boats with a splined drive shaft.   **The...
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    $1,049.99
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  • MasterCraft OEM Drive Shaft 49" - 322 MasterCraft OEM Drive Shaft 49" - 322

    MasterCraft OEM Drive Shaft 49" - 322

    MasterCraft
    $833.99
    MasterCraft OEM Drive Shaft 49" - 322 This genuine MasterCraft drive shaft is 49 inches long by 1-1/8 inch diameter and is double splined. Comes with a new prop nut and cotter pin. Designed for boats with a splined drive shaft.   **The images are of a...
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    $833.99
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  • MasterCraft OEM Tracking Fin - 190

    MasterCraft
    $244.99
    MasterCraft OEM Tracking Fin- 190 This genuine MasterCraft OEM Tracking is model specific. If you have damaged your rudder Tracking Fin it is typical that you have with other Under Water Gear damage. Use the Parts Finder to select your year make and...
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    $244.99
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  • MasterCraft Fast Fill Ballast Pump - 30 GPM MasterCraft Fast Fill Ballast Pump - 30 GPM

    MasterCraft Fast Fill Ballast Pump - 30 GPM

    MasterCraft
    $394.99
    MasterCraft Fast Fill Ballast Pump - 30 GPM Found in newer MasterCraft XT and XSeries boats with the "fast Fill" option.  This SPX Flow Johnson Pump 30 GPM Ballast Pump cannot be installed in place of the standard 13.7 GPM pumps. Flow: 30 GPM Amps:...
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    $394.99
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  • Tsunami Ballast Pump - NXT Tsunami Ballast Pump - NXT

    Tsunami Ballast Pump - NXT

    MasterCraft
    $85.99
    MasterCraft Tsunami Ballast Pump - NXT This MasterCraft Tsunami NXT Ballast Pump is what the 2015 - 2024 NXT series in Mastercraft uses for the ballast system. Each ballast location will have two pumps, one to fill and one to empty.  Your...
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    $85.99
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  • MasterCraft Ballast Pump - 13.7 GPM Mastercraft Ballast Pump - 13.7 GPM

    Mastercraft Ballast Pump - 13.7 GPM

    MasterCraft
    $349.99
    MasterCraft Ballast Pump - 13.7 GPM SPX Flow Johnson Pump 13.7 GPM Ballast Pump 12V Flow: 13.7 GPM Amps: 13A Fuse: 25A Thermal Overload Protection Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
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    $349.99
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  • Mastercraft Tracking Fin - 4 Bolt

    Mastercraft Tracking Fin - 4 Bolt

    MasterCraft
    $319.99
    Mastercraft Tracking Fin - 4 Bolt This 4 Bolt Mastercraft Tracking Fin is suited for boats between 1979-2000. If you're unsure whether this tracking fin is for your boat - please call us at 763-404-7372 
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    $319.99
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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.