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Inboard & I/O Engine Parts

Inboard Marine Engine Parts and Accessories

As the largest online dealer of inboard boat parts, Marine Parts Source will help you find the right engine parts you need for any project. We’re here to assist with seasonal maintenance, major repairs and more so you can get back on the water. Use our convenient categories to browse our collection — or if you know the part number you need, enter it into the search bar. From oil and fuel filters to spark plugs, exhaust manifolds, bell housings, starters and alternator belts, we supply boat owners from coast to coast.

You can always count on quality and knowledge when you shop with us. We’re an authorized dealer of the leading OEM and aftermarket performance inboard marine brands, including J&N Electric, Sierra, Arco Marine, Volvo Penta and Crusader. If you have a question, our sales associates have the technical expertise to answer it. Enjoy free ground shipping on qualifying orders so your vessel is ready for adventure.

Inboard & I/O Engine Parts

Items 73-84 of 584

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    160 Degree Thermostat | Sierra 18-3649
    SIERRA-18-3649
    Qty In Stock: 21
    Brand: Sierra

    Aftermarket 160 degree thermostat fits many different closed water cooled marine engines

    Learn More
    MSRP: $27.59 $18.20
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  2. s11635511201_lg
    1-1/2 inch Type A2 Fuel Fill Hose, sold per foot | Sierra 116-355-1120-1
    SIERRA-116-355-1120-1
    Qty In Stock: 415
    Brand: Sierra
    Primarily used for gas or diesel fuel fill lines in pleasure boats. 1 1/2 in. inside diameter. Price per foot. Learn More
    MSRP: $18.06 $15.05
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  3. Sierra 18-7270 Crusader Fuel Pump
    Crusader Mechanical Fuel Pump | Sierra 18-7270
    SIERRA-18-7270
    Qty In Stock: 4
    Brand: Sierra

    Sierra replacement mechanical fuel pump for GM 305, 350, and 400 cubic inch marine engines marinized by Crusader

    Learn More
    MSRP: $348.09 $252.79
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  4. Small Image
    Mercruiser Thunderbolt Ignition HEI V8 Tune Up Kit | Sierra 18-5273
    SIERRA-18-5273
    Qty In Stock: 91
    Brand: Sierra
    Tune-up kit includes cap & rotor fits Mercruiser V8 marine engines with Thunderbolt distributors. Learn More
    MSRP: $52.79 $34.13
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  5. Sierra Mercruiser Bravo Water Pump Kit - 18-3150
    Mercruiser Bravo Water Pump Kit | Sierra 18-3150
    SIERRA-18-3150
    Qty In Stock: 73
    Brand: Sierra

    Impeller kit with a one-piece pump housing for Mercruiser Bravo engine-mounted raw water pump.

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    MSRP: $107.99 $107.99
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    Delco HEI Ignition Coil | Sierra 18-5443
    SIERRA-18-5443
    Qty In Stock: 12
    Brand: Sierra

    Ignition coil with mounting bracket fits GM marine engines with Delco EST HEI ignition systems.

    Learn More
    MSRP: $119.49 $76.38
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  7. Small Image
    Gasoline Engine Oil Filter | Sierra 18-7876-1
    SIERRA-18-7876-1
    Qty In Stock: 95
    Brand: Sierra
    Sierra oil filter for GM based marine engines with GM long style oil filters. Learn More
    MSRP: $11.09 $8.52
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    GM Big Block Exhaust Manifold Gasket Set | Sierra 18-4348
    SIERRA-18-4348
    Qty In Stock: 9
    Brand: Sierra
    Gasket kit includes 2 manifold to head gaskets & 2 center rise elbow restrictor gaskets for a pair of Mercruiser 7.4L & 8.2L center rise exhaust manifolds. Learn More
    MSRP: $51.59 $32.53
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    Chrysler 160 Degree Thermostat | Sierra 18-3645
    SIERRA-18-3645
    Qty In Stock: 20
    Brand: Sierra
    Thermostat 160 Degrees Learn More
    MSRP: $28.99 $19.68
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  10. Sierra 18-5817 Curved Bracket Solenoid
    Curved Bracket Solenoid | Sierra 18-5817
    SIERRA-18-5817
    Qty In Stock: 88
    Brand: Sierra

    12 volt isolated base starter solenoid and tilt & trim solenoid for various Mercury and Mercruiser applications.

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    MSRP: $29.89 $21.84
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    Mercruiser 470 Alternator Conversion Kit | Sierra 18-5953-1
    SIERRA-18-5953-1
    Qty In Stock: 1
    Brand: Sierra

    Converts original stator type charging system on Mercruiser 470 3.7 liter marine engines to a conventional alternator charging system.

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    MSRP: $1,355.69 $965.97
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  12. Small Image
    Rochester 2BBL Carburetor Repair Kit | Sierra 18-7086
    SIERRA-18-7086
    Qty In Stock: 9
    Brand: Sierra
    Repair kit for Rochester 2 BBL carburetor used on various OMC and Volvo Penta marine engines. Learn More
    MSRP: $53.99 $34.67
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Items 73-84 of 584

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