Engine Parts

Keep your inboard engine running strong with premium boat engine parts from WaterSkis.com—your trusted source for Mastercraft, Supra, and Moomba boat parts. Whether you’re chasing glassy water for a morning ski session or heading out for a weekend of wakeboarding, your engine needs to be dialed in and ready to go.

Our selection includes genuine and aftermarket boat engine parts, including spark plugs, impellers, sensors, belts, filters, and more—designed specifically for Mastercraft boat engine parts, Supra boat engine parts, and Moomba engine systems. We only carry parts from trusted brands known for reliability, so you can service your engine with confidence.

Not sure what part fits your boat? Use our Boat Part Lookup Tool to find engine components by year, make, and model. At WaterSkis.com, we make it easy to get back on the water with performance-focused parts that fit right the first time.


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  • Ilmor O-Ring, RWP Impeller | PV07037

    Ilmor O-Ring, RWP Impeller | PV07037

    Ilmor
    $2.99
    Ilmor O-Ring, RWP Impeller | PV07037 The Ilmor raw water pump impeller o-ring is manufactured using the same high-quality materials used when your engine first comes off the line providing reliability and longevity.    
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    $2.99
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  • Ilmor Idler Pulley - D76mm-6Rib | PV06692

    Ilmor Idler Pulley - D76mm-6Rib | PV06692

    Ilmor
    $43.99
    Ilmor Idler Pulley - D76mm-6Rib | PV06692 The Ilmor idler pulley is built with smoother surfaces and tighter dimensional tolerances, which translates to less vibration, and therefore longer pulley life.  
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    $43.99
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  • Ilmor Crankshaft Position Sensor | 1421

    Ilmor Crankshaft Position Sensor | 1421

    Ilmor
    $184.99
    Ilmor Crankshaft Position Sensor | 1421 Ilmor specified crankshaft position sensor provides OEM required performance and reliability. This quality part is an exact replacement part for your Ilmor engine.  
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    $184.99
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  • Ilmor Circulation Water Pump | 1131

    Ilmor Circulation Water Pump | 1131

    Ilmor
    $479.99
    Ilmor Circulation Water Pump | 1131 Ilmor’s circulation pump assembly is specifically designed to keep your boat running cool and efficiently all season long. This factory direct part keeps your Ilmor engine operating to OEM specifications.  
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    $479.99
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  • Ilmor Formed Raw Water Pump/Circulation Pump Hose | PE01458

    Ilmor Formed Raw Water Pump/Circulation Pump Hose | PE01458

    Ilmor
    $69.99
    Ilmor Formed Raw Water Pump/Circulation Pump Hose | PE01458 This genuine Ilmor molded hose is specifically manufactured to fit your engine and is made from the highest quality materials ensuring reliability and durability.  
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    $69.99
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  • Ilmor Formed Oil Cooler/Raw Water Pump Hose | PE01451

    Ilmor Formed Oil Cooler/Raw Water Pump Hose | PE01451

    Ilmor

    $79.99
    Ilmor Formed Oil Cooler/Raw Water Pump Hose | PE01451 This genuine Ilmor molded hose is specifically manufactured to fit your engine and is made from the highest quality materials ensuring reliability and durability.  
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    $79.99
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  • Ilmor Intake Manifold Mounting Gasket | PV06477

    Ilmor Intake Manifold Mounting Gasket | PV06477

    Ilmor
    $34.99
    Ilmor Intake Manifold Mounting Gasket | PV06477 Stop power robbing exhaust leaks with this premium Ilmor exhaust intake manifold mounting gasket. Made to be a perfect fit with your engine and featuring a reinforced design to help eliminate heat cracking...
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    $34.99
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  • Ilmor Fitting, Barb Tee 3/4 | PV06823

    Ilmor Fitting, Barb Tee 3/4 | PV06823

    Ilmor
    $7.99
    Ilmor Fitting, Barb Tee 3/4 | PV06823 Top quality fitting ensures long service life and reliability.      
    Qty in Cart: 0
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    $7.99
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  • Ilmor Pulley, Tensioner 6.0/6.2/7.4L | PV06822

    Ilmor Pulley, Tensioner 6.0/6.2/7.4L | PV06822

    Ilmor
    $44.99
    Ilmor Pulley, Tensioner 6.0/6.2/7.4L | PV06822 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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    $44.99
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  • Ilmor Oil FIlter Bolt Adaptor | 50T-0097

    Ilmor Oil FIlter Bolt Adaptor | 50T-0097

    Ilmor
    $9.99
    Ilmor Oil FIlter Bolt Adaptor | 50T-0097 The high-quality, Ilmor specified oil filter adapter bolt ensures a secure fit between your engine and the oil filter housing.  
    Qty in Cart: 0
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    $9.99
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  • Ilmor GDI Thermostat | PV07759

    Ilmor GDI Thermostat | PV07759

    Ilmor
    $39.99
    Ilmor GDI Thermostat | PV07759 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 this thermostat specifically designed to fit your Ilmor engine.  
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    $39.99
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  • Ilmor G5 Expansion Tank | 50H-0062

    Ilmor G5 Expansion Tank | 50H-0062

    Ilmor
    $59.99
    Ilmor G5 Expansion Tank | 50H-0062 This coolant expansion tank is the direct replacement part for your factory-installed Ilmor coolant expansion tank.  
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    $59.99
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  • Ilmor O2 Upstream Sensor | PV07124

    Ilmor O2 Upstream Sensor | PV07124

    Ilmor
    $159.99
    Ilmor O2 Upstream Sensor | PV07124 Ilmor specified oxygen sensor is the recommended replacement for your Ilmor engine. The sensors provide special feedback to your engine’s exhaust system by measuring the proportion of oxygen in the exhaust gases. Using...
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    $159.99
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  • Imor EPDM | 50H-0116

    Imor EPDM | 50H-0116

    Ilmor
    $714.99
    Imor EPDM | 50H-0116 Ilmor genuine EPDM is designed to take the headache out of using traditional fuses, making servicing a dream. This is a direct replacement for your engines factory EPDM unit.  
    Qty in Cart: 0
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    $714.99
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  • Ilmor Thermostat Gasket | PV07351

    Ilmor Thermostat Gasket | PV07351

    Ilmor
    $10.99
    Ilmor Thermostat Gasket | PV07351 This Ilmor specified thermostat gasket offers application-specific materials to give you a sealing solution with durability and reliability you can trust.  
    Qty in Cart: 0
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    $10.99
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  • Ilmor O2 Sensor Downstream | PV07075

    Ilmor O2 Sensor Downstream | PV07075

    Ilmor
    $89.99
    Ilmor O2 Sensor Downstream | PV07075 Ilmor specified oxygen sensor is the recommended replacement for your Ilmor engine. The sensors provide special feedback to your engine’s exhaust system by measuring the proportion of oxygen in the exhaust gases...
    Qty in Cart: 0
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    $89.99
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  • Ilmor O-Ring, Plenum Mounting

    Ilmor O-Ring, Plenum Mounting

    Ilmor
    $3.99
    Ilmor O-Ring, Plenum Mounting 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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    $3.99
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