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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  • Supra | Moomba Rudder Assembly | 135 (113135) Supra | Moomba Rudder Assembly | 135 (113135)

    Supra | Moomba Rudder Assembly | 135

    Skiers Choice
    $2,007.45
    Supra | Moomba Rudder Assembly | 113135 This is a complete rudder and rudder port assembly for Supra and Moomba Boats. Rudder Assembly Kit. Use the Boat Part Lookup to ensure you are getting the correct part for your Supra and Moomba Boat.  
    Qty in Cart: 0
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    $2,007.45
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  • Supra | Moomba Rudder Assembly | 281

    Supra | Moomba Rudder Assembly | 281

    Skiers Choice
    $1,003.72
    Supra | Moomba Rudder Assembly | 108281 This is a complete rudder and rudder port assembly for Supra and Moomba Boats. Rudder Assembley Kit, Large (V Drive) Use the Boat Part Lookup to ensure you are getting the correct part for your Supra and Moomba...
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    $1,003.72
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  • Supra | Moomba Strut - 15 deg. 1 1/8" | 127

    Supra | Moomba Strut - 15 deg. 1 1/8" | 127

    Skiers Choice
    $573.55
    Supra | Moomba Strut-15 Degree 1 1/8" | 117127 This is a 15 Degree Strut for a 1 1/8" shaft for Supra and Moomba Boats. Use the Boat Part Lookup to ensure you are getting the correct part for your Supra and Moomba Boat.  
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    $573.55
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  • Supra | Moomba Strut - 14 deg. 1" | 030 (101030)

    Supra | Moomba Strut - 14 deg. 1" | 030

    Skiers Choice
    $609.39
    Supra | Moomba Strut-14 Degree 1" | 101030 This is a 14 Degree Strut for a 1" shaft for Supra and Moomba Boats. Use the Boat Part Lookup to ensure you are getting the correct part for your Supra and Moomba Boat.  
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    $609.39
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  • Supra | Moomba Drive Shaft-48" | 100918

    Supra | Moomba Drive Shaft-48" | 100918

    Skiers Choice
    $860.33
    Supra | Moomba Drive Shaft-48" w/4 Coupler | 100918 This is a 48" 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...
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    $860.33
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  • Supra | Moomba Drive Shaft-54.75"x 1-1/8" | 855

    Skiers Choice
    $1,720.67
    Supra | Moomba Drive Shaft-54.75"x1-1/8" | 119855 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...
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    $1,720.67
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  • 22' Steering Cable

    22' Steering Cable

    Skiers Choice
    $430.16
    22' 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 many Supra and Moomba boats. A new steering cable helps keep your boat operating in peak...
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    $430.16
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  • Ilmor Circulation Water Pump | PV08093

    Ilmor Circulation Water Pump | PV08093

    Ilmor
    $430.16
    Ilmor Circulation Water Pump | PV08093 ***Don't forget to order the 2 gaskets needed when replacing this pump*** The Ilmor Circulation Water Pump (part # PV08093) is designed as a direct replacement for OEM Ilmor marine engines—particularly the 5...
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    $430.16
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  • Ilmor Holder Strainer Wrench | 50G-0174

    Ilmor Holder Strainer Wrench | 50H-0174

    Ilmor
    $38.70
    Ilmor Holder Strainer Wrench | 50H-0174 The Ilmor raw water pump strainer wrench holder provides safe and secure storage for your wrench when not in use.  
    Qty in Cart: 0
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    $38.70
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  • Ilmor Ignition Knock Sensor | PV07167

    Ilmor Ignition Knock Sensor | PV07167

    Ilmor
    $50.17
    Ilmor Ignition Knock Sensor | PV07167 This sensor is designed to work as a direct replacement for your factory-installed engine knock sensor and is manufactured to exact factory specifications.
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    $50.17
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  • Ilmor Sea Strainer Basket | 50H-0073

    Ilmor Sea Strainer Basket | 50H-0073

    Ilmor
    $43.00
    Ilmor Sea Strainer Basket | 50H-0073 Replace your sea strainer basket with this genuine Ilmor replacement part. The basked provides the same quality and fit as the original Ilmor part you can trust.  
    Qty in Cart: 0
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    $43.00
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  • Ilmor Electric Throttle Body | 1016 (MV8V1016)

    Ilmor Electric Throttle Body | 1016

    Ilmor
    $716.94
    Ilmor Electric Throttle Body | 1016 Designed as an exact replacement for your factory-installed throttle body this quality Ilmor service part ensures your engine continues to have the same performance you expect out of Ilmor.  
    Qty in Cart: 0
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    $716.94
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  • Ilmor Transmission Mount Port (45A/63A/63IV)

    Ilmor Transmission Mount Port (45A/63A/63IV)

    Ilmor
    $193.56
    Ilmor Transmission Mount Port (45A/63A/63IV) Ilmor port side transmission mount is an exact replacement for your factory-installed mount and provides the same reliability and quality you expect from Ilmor.    
    Qty in Cart: 0
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    $193.56
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  • Ilmor Transmission Mount Starboard (45A/63A/63IV)

    Ilmor Transmission Mount Starboard (45A/63A/63IV)

    Ilmor
    $193.56
    Ilmor Transmission Mount Starboard (45A/63A/63IV) Ilmor’s starboard transmission mount is an exact replacement for your factory-installed mount and provides the same reliability and quality you expect from Ilmor.  
    Qty in Cart: 0
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    $193.56
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  • Ilmor Engine Oil Pressure Sensor | PV07169

    Ilmor Engine Oil Pressure Sensor | PV07169

    Ilmor
    $144.81
    Ilmor Engine Oil Pressure Sensor | PV07169 This sensor is designed to work as a direct replacement for your factory-installed engine oil pressure sensor and is manufactured to exact factory specifications.  
    Qty in Cart: 0
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    $144.81
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  • Ilmor Oil Drain Hose | PE01916

    Ilmor Oil Drain Hose | PE01916

    Ilmor
    $164.88
    Ilmor Oil Drain Hose | PE01916 This genuine Ilmor hose is specifically manufactured to fit your engine and is made from the highest quality materials ensuring reliability and durability.    
    Qty in Cart: 0
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    $164.88
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  • Ilmor Fiber Washer | PV07955

    Ilmor Fiber Washer | PV07955

    Ilmor
    $12.89
    Ilmor Fiber Washer | PV07955 Made with high-quality materials that ensure OEM specified performance.  
    Qty in Cart: 0
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    $12.89
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  • Ilmor Jumper Lead, Coolant Temp | PL00373

    Ilmor Jumper Lead, Coolant Temp | PL00373

    Ilmor
    $41.57
    Ilmor Jumper Lead, Coolant Temp | PL00373 This jumper lead is a direct replacement part for your coolant temperature sensor.  
    Qty in Cart: 0
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    $41.57
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  • Ilmor Distributor Mounting Gasket | PV05903

    Ilmor Distributor Mounting Gasket | PV05903

    Ilmor
    $4.29
    Ilmor Distributor Mounting Gasket | PV05903 This Ilmor distributor mounting gasket is manufactured from factory specified materials to provide performance and durability you can rely on.  
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    $4.29
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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.