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 Muffler | 3.5" In/Out - Stbd (7.4L)

    MasterCraft Muffler | 3.5" In/Out - Stbd (7.4L)

    MasterCraft
    $719.99
    MasterCraft Muffler | 3.5" In/Out - Stbd (7.4L) This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $719.99
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  • MasterCraft Muffler | 3.5" In/Out - Port (7.4L)

    MasterCraft Muffler | 3.5" In/Out - Port (7.4L)

    MasterCraft
    $719.99
    MasterCraft Muffler | 3.5" In/Out - Port (7.4L) This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $719.99
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  • MasterCraft Muffler | 3.5" In/Out - Stbd (6.0L/6.2L)

    MasterCraft Muffler | 3.5" In/Out - Stbd (6.0L/6.2L)

    MasterCraft
    $649.99
    MasterCraft Muffler | 3.5" In/Out - Stbd (6.0L/6.2L) This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $649.99
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  • MasterCraft Muffler | 3.5" In/Out - Port (6.0L/6.2L)

    MasterCraft Muffler | 3.5" In/Out - Port (6.0L/6.2L)

    MasterCraft
    $649.99
    MasterCraft Muffler | 3.5" In/Out - Port (6.0L/6.2L) This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $649.99
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  • MasterCraft Muffler | 3.5" In/Out - Stbd (5.7L)

    MasterCraft Muffler | 3.5" In/Out - Stbd (5.7L)

    MasterCraft
    $639.99
    MasterCraft Muffler | 3.5" In/Out - Stbd (5.7L) This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $639.99
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  • MasterCraft Muffler | 3.5" In/Out - Port (5.7L)

    MasterCraft Muffler | 3.5" In/Out - Port (5.7L)

    MasterCraft
    $639.99
    MasterCraft Muffler | 3.5" In/Out - Port (5.7L) This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $639.99
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  • MasterCraft Muffler | 3.5" In/Out - Stbd - MCX

    MasterCraft Muffler | 3.5" In/Out - Stbd - MCX

    MasterCraft
    $614.99
    MasterCraft Muffler | 3.5" In/Out - Stbd - MCX This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $614.99
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  • MasterCraft Muffler | 3.5" In/Out -Port - MCX

    MasterCraft Muffler | 3.5" In/Out -Port - MCX

    MasterCraft
    $614.99
    MasterCraft Muffler | 3.5" In/Out -Port - MCX This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $614.99
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  • MasterCraft Muffler | 4" In w/60° Angle - 3.5" Out w/ 80° Angle - Vertical

    MasterCraft Muffler | 4" In w/60 Degree Angle - 3.5" Out w/80 Degree Angle - Vertical

    MasterCraft
    $689.99
    MasterCraft Muffler | 4" In w/60° Angle - 3.5" Out w/ 80° Angle - Vertical This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat...
    Qty in Cart: 0
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    $689.99
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  • MasterCraft Muffler | 3.5" Offset Inlet/Outlet

    MasterCraft Muffler | 3.5" Offset Inlet/Outlet

    MasterCraft
    $519.99
    MasterCraft Muffler | 3.5" Offset Inlet/Outlet This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $519.99
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  • MasterCraft Muffler | 3" Inline Lift W/60° Angle - 3" outlet

    MasterCraft Muffler | 3" Inline Lift W/60° Angle - 3" outlet

    MasterCraft
    $569.99
    MasterCraft Muffler | 3" Inline Lift W/60° Angle - 3" outlet This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $569.99
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  • MasterCraft Muffler | 3.5" In/Out Inline Horizontal

    MasterCraft Muffler | 3.5" In/Out Inline Horizontal

    MasterCraft
    $564.99
    MasterCraft Muffler | 3.5" In/Out Inline Horizontal This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $564.99
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  • MasterCraft Muffler | 3" x 38" w/60° Angle

    MasterCraft Muffler | 3" x 38" w/60° Angle

    MasterCraft
    $399.99
    MasterCraft Muffler | 3" x 38" w/60° Angle This is a genuine replacement fiberglass muffler for many MasterCraft boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat.  
    Qty in Cart: 0
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    $399.99
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  • Supra | Moomba Drive Shaft-52.75"x 1-1/8" | 273

    Skiers Choice
    $729.99
    Supra | Moomba Drive Shaft-52.75"x1-1/8" | 273 This is a 52.75" Drive Shaft by 1-1/8" diameter for Supra and Moomba Boats. ***Skier’s Choice couplers are pressed onto the shaft and the assembly is CNC balanced to improve performance and reduce...
    Qty in Cart: 0
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    $729.99
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  • Supra | Moomba Drive Shaft-54.75"x 1-1/8" | 300

    Skiers Choice
    $799.99
    Supra | Moomba Drive Shaft-54.75"x1-1/8" | 263 This is a 54.75" Drive Shaft by 1-1/8" diameter for Supra and Moomba Boats. ***Skier’s Choice couplers are pressed onto the shaft and the assembly is CNC balanced to improve performance and reduce...
    Qty in Cart: 0
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    $799.99
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  • Supra | Moomba Drive Shaft-49"x 1-1/8"

    Supra | Moomba Drive Shaft-49"x 1-1/8" | 917

    Skiers Choice
    $749.99
    Supra | Moomba Drive Shaft-49"x1-1/8" | 917 This is a 49" Drive Shaft by 1-1/8" diameter for Supra and Moomba Boats. ***Skier’s Choice couplers are pressed onto the shaft and the assembly is CNC balanced to improve performance and reduce vibration...
    Qty in Cart: 0
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    $749.99
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  • Supra | Moomba Drive Shaft - 51"x1-1/8"

    Supra | Moomba Drive Shaft-51"x 1-1/8" | 646

    Skiers Choice
    $745.99
    Supra | Moomba Drive Shaft - 51"x1-1/8" | 646 This is a 51" Drive Shaft by 1-1/8" diameter for Supra and Moomba Boats. ***Skier’s Choice couplers are pressed onto the shaft and the assembly is CNC balanced to improve performance and reduce...
    Qty in Cart: 0
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    $745.99
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  • Supra | Moomba Drive Shaft-46.75"x 1-1/8" | 787

    Supra | Moomba Drive Shaft-46.75"x 1-1/8" | 787

    Skiers Choice

    $599.99
    Supra | Moomba Drive Shaft-46.75"x1-1/8" | 787 This is a 46.75" Drive Shaft by 1-1/8" diameter for Supra and Moomba Boats. ***Skier’s Choice couplers are pressed onto the shaft and the assembly is CNC balanced to improve performance and reduce...
    Qty in Cart: 0
    Quantity:
    Price:
    $599.99
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  • Supra | Moomba Drive Shaft-46"x 1" | 916

    Supra | Moomba Drive Shaft-46"x 1" | 916

    Skiers Choice
    $649.99
    Supra | Moomba Drive Shaft-46"x1" | 916 This is a 46" Drive Shaft by 1" diameter for Supra and Moomba Boats. ***Skier’s Choice couplers are pressed onto the shaft and the assembly is CNC balanced to improve performance and reduce vibration. The coupler...
    Qty in Cart: 0
    Quantity:
    Price:
    $649.99
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  • Supra | Moomba Drive Shaft-50"x 1-1/8" | 356

    Supra | Moomba Drive Shaft-50"x 1-1/8" | 356

    Skiers Choice
    $799.99
    Supra | Moomba Drive Shaft-50"x1-1/8" | 356 This is a 50" Drive Shaft by 1-1/8" diameter for Supra and Moomba Boats. ***Skier’s Choice couplers are pressed onto the shaft and the assembly is CNC balanced to improve performance and reduce vibration...
    Qty in Cart: 0
    Quantity:
    Price:
    $799.99
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  • Total: items /

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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.