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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  • Ilmor Water Pump Gasket | PV06732

    Ilmor Water Pump Gasket | PV06732

    Ilmor
    $10.99
    Ilmor Water Pump Gasket | PV06732 This Ilmor water pump gasket features quality materials to give you a sealing solution needed to maintain OEM specified reliability and durability.  
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    $10.99
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  • Ilmor Thermostat Flat Rubber Gasket | 500-0044

    Ilmor Thermostat Flat Rubber Gasket | 500-0044

    Ilmor
    $4.99
    Ilmor Thermostat Flat Rubber Gasket | 500-0044 This Ilmor flat rubber thermostat gasket consists of quality materials to give you a sealing solution with performance and reliability you can trust.  
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    $4.99
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  • Ilmor Stainless Freeze Plug | PV05997

    Ilmor Stainless Freeze Plug | PV05997

    Ilmor
    $1.99
    Ilmor Stainless Freeze Plug | PV05997 The Ilmor stainless steel freeze plug features a concave design to ensure a leak-proof fit for your engine.  
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    $1.99
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  • Ilmor Idler Pulley | PV06474

    Ilmor Idler Pulley | PV06474

    Ilmor
    $44.99
    Ilmor Idler Pulley | PV06474 The Ilmor idler/tensioner pulleys are built with smoother surfaces and tighter dimensional tolerances, which translates to less vibration, and therefore longer pulley life.  
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  • Ilmor Fuel Injector Assembly | 1011

    Ilmor Fuel Injector Assembly | 1011

    Ilmor
    $111.99
    Ilmor Fuel Injector Assembly | 1011 This Ilmor specified fuel injector assembly is our recommended replacement for your engine’s original component.  
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    $111.99
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  • Ilmor Exhaust Manifold to Head Gasket | 1057

    Ilmor Exhaust Manifold to Head Gasket | 1057

    Ilmor
    $55.99
    Ilmor Exhaust Manifold to Head Gasket | 1057 Ilmor exhaust manifold gasket gaskets offer factory specified materials to give you sealing solutions with the performance and durability you can rely on.  
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  • Ilmor 20PSI Pressure Cap | PV07058

    Ilmor 20PSI Pressure Cap | PV07058

    Ilmor
    $14.99
    Ilmor 20PSI Pressure Cap | PV07058 A faulty coolant system cap can cause your boat to boil-over at a lower temperature. With the Ilmor 20 PSI pressure cap, you can rest easy knowing that proper pressure will be maintained. Ilmor recommends that you test...
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    $14.99
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  • Ilmor 6.0L MPI Thermostat Kit | KT1438

    Ilmor 6.0L MPI Thermostat Kit | KT1438

    Ilmor
    $79.99
    Ilmor 6.0L MPI Thermostat Kit | KT1438 Have a boat engine that doesn’t seem to heat up? A lot of times, that problem is caused by a worn-out thermostat. Replace those failing thermostats and seals with this kit specifically designed to fit your...
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    $79.99
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  • Ilmor Coil Wires | PL00385

    Ilmor Coil Wires | PL00385

    Ilmor
    $84.99
    Ilmor Coil Wires | PL00385 Ilmor’s premium quality coil wires are the recommended replacement for your Ilmor engine. Constructed using the highest quality silicone, these wires protect against harsh engine compartment conditions that degrade wires...
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    $84.99
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  • Ilmor Breaker, 50 AMP Manual Reset | PV06101

    Ilmor Breaker, 50 AMP Manual Reset | PV06101

    Ilmor
    $64.99
    Ilmor Breaker, 50 AMP Manual Reset | PV06101 This Ilmor approved 50 breaker is a direct replacement for all Ilmor 50 AMP manual reset breakers.  
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    $64.99
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  • Ilmor Exhaust Manifold Mounting Gasket | 1054

    Ilmor Exhaust Manifold Mounting Gasket | 1054

    Ilmor
    $24.99
    Ilmor Exhaust Manifold Mounting Gasket | 1054 Stop power robbing exhaust leaks with this premium Ilmor exhaust manifold mounting gasket. Made to be a perfect fit with your engine and featuring a reinforced design to help eliminate heat cracking and...
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    $24.99
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  • Ilmor O-Ring, Plenum Mounting N1470-70

    Ilmor O-Ring, Plenum Mounting N1470-70

    Ilmor
    $2.99
    Ilmor O-Ring, Plenum Mounting N1470-70 The Ilmor plenum mounting o-ring is designed for the best performance and reliability for your boat. It is manufactured using the same high-quality materials used when your engine first comes off the line.  
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    $2.99
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  • Ilmor Water Pump Gasket | 1320

    Ilmor Water Pump Gasket | 1320

    Ilmor
    $7.49
      Ilmor Water Pump Gasket | 1320 The Ilmor water pump gasket offers 100% sealing with application-specific materials to give you a sealing solution with the performance and durability you can trust. **Gaskets are sold individually, need to order a...
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    $7.49
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  • Ilmor Spark Plug Wire (Set) | PL00234

    Ilmor Spark Plug Wire (Set) | PL00234

    Ilmor
    $72.99
    Ilmor Spark Plug Wire (Set) | PL00234 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.  
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    $72.99
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  • Ilmor Anode | PV07080

    Ilmor Anode | PV07080

    Ilmor
    $12.99
    Ilmor Anode | PV07080 Genuine Ilmor specified replacement sacrificial anode for saltwater protection.  
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    $12.99
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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.