Engine Block Parts

Keep your inboard engine running smoothly with quality engine block parts from WaterSkis.com. Whether you’re draining for winterization or replacing a worn-out fitting, we offer essential components like engine block plugs, block drain hoses, and block fittings—all compatible with popular Mastercraft, Supra, and Moomba boats.

Browse a curated selection of OEM and trusted aftermarket parts engineered for durability, exact fitment, and long-term performance. Not sure which parts your boat needs? Our Boat Part Lookup Tool takes the guesswork out—just enter your boat's make, model, and year to find the exact engine block parts required.

From maintenance to major repairs, WaterSkis.com provides the parts and support you need to stay ahead of costly issues and maximize your time on the water.


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  • Indmar Engine Block Plug

    Indmar Engine Block Plug

    Indmar
    $2.99
    Indmar Engine Block Plug Indamr Brass engine block plug from Indmar Marine engines. This is a 1/4 plug with hex head. Replace your worn block plug(s) regularly to speed up engine block drain time, winterization and more. Please note some engines may have...
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    $2.99
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  • Ilmor Hose Assembly, Block Drain | PE01791

    Ilmor Hose Assembly, Block Drain | PE01791

    Ilmor
    $48.99
    Ilmor Hose Assembly, Block Drain | PE01791 This genuine Ilmor hose is specifically manufactured to fit your engine and is made from the highest quality materials ensuring reliability and durability.  
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    $48.99
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  • Indmar Oil Drain Kit NON-Metric | 511001

    Indmar Oil Drain Kit NON-Metric | 511001

    Indmar
    $97.25
    Indmar Oil Drain Kit NON-Metric | 511001 For Pre-Vortec Engines. Standard Thread. This genuine Indmar hose is specifically manufactured to fit your engine and is made from the highest quality materials ensuring reliability and durability.    
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    $97.25
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  • Indmar Oil Drain Kit Metric | 511009

    Indmar Oil Drain Kit Metric | 511009

    Indmar
    $97.25
    Indmar Oil Drain Kit Metric | 511009 12mm Hex Style Fitting. This genuine Indmar hose is specifically manufactured to fit your engine and is made from the highest quality materials ensuring reliability and durability.    
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    $97.25
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  • Indmar Remote Oil Hose - 33.5"

    Indmar Remote Oil Hose - 33.5"

    Indmar
    $64.99
    Indmar Remote Oil Hose - 33.5" Indmar remote oil hose - 33.5" with screw on connectors.  
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    $64.99
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  • Indmar Oil Pressure Sender Indmar Oil Pressure Sender

    Indmar Oil Pressure Sender

    Indmar

    $199.99
    Indmar Oil Pressure Sender Genuine Indmar Oil Pressure Sender. This part is commonly found in Indmar engines in MasterCraft, Malibu, Supra and Moomba boats. Use the boat part look up below to ensure you are purchasing the correct part for your boat...
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    $199.99
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  • Indmar Oil Cap For Steel Valve Covers Indmar Oil Cap For Steel Valve Covers

    Indmar Oil Cap For Steel Valve Covers

    Indmar
    $29.99
    Indmar Oil Cap For Steel Valve Covers Proper maintenance ensures that your boat performs in peak condition year after year. Indmar Engines offers this replacement oil cap for engines using steel valve covers and a threaded oil cap. Please note this oil...
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    $29.99
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