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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 1-12 of 57

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  1. Delco EST Replacement Distributor Kit - United Ignition Wire - GMESTV8
    GM V8 EST Electronic Distributor Kit | United Marine GMESTV8
    UIW-GMESTV8
    Qty In Stock: 313
    Brand: United Motor Products
    Electronic spark timing EST style replacement ignition kit for GM small and big block marine engine applications. Learn More
    MSRP: $838.65 $566.50
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  2. Large Image
    Delco HVS V8 Tri-Pak Tune-Up Kit | United Marine 1-217
    UIW-1-217
    Qty In Stock: 46
    Brand: United Motor Products
    Delco HVS V8 Tri-Pak Tune-Up Kit Learn More
    MSRP: $206.01 $158.59
    Add to Wishlist
  3. United Marine C-535B Delco EST Ignition Coil
    Delco EST Ignition Coil | United Marine C-535B
    UIW-C-535B
    Qty In Stock: 18
    Brand: United Motor Products
    Delco EST Ignition Coil Learn More
    MSRP: $65.88 $62.59
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  4. United Marine 220 Sparkplug Wire Set V8 Volvo EST
    Sparkplug Wire Set Volvo 5.0L & 5.7L V8 Delco EST | United Marine 220
    UIW-220
    Qty In Stock: 14

    Custom tailored 8mm sparkplug wire set for Volvo 5.0L and 5.7L V8 engines with Delco EST igntion system.

    Learn More
    MSRP: $96.45 $77.36
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  5. uiw126_lg
    Crusader Delco EST Spark Plug Wire Set | United Marine 126
    UIW-126
    Qty In Stock: 57
    Brand: United Motor Products
    Crusader Delco EST Spark Plug Wire Set Learn More
    MSRP: $86.43 $61.06
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    Crusader Prestolite V8 Spark Plug Wire Set | United Marine 201
    UIW-201
    Qty In Stock: 26
    Brand: United Motor Products
    Crusader Prestolite V8 Spark Plug Wire Set Learn More
    MSRP: $89.67 $70.61
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  7. HVS Ignition Coil & Module Assembly | United Marine OD-155
    HVS Ignition Coil & Module Assembly | United Marine OD-155
    UIW-OD-155
    Qty In Stock: 5

    HVS ignition system coil assembly used on 4.3L, 5.0L and 5.7L GM engines with multiport fuel injection.  

    Learn More
    MSRP: $148.50 $140.79
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    Delco HVS V6 Tri-Pak Tune-Up Kit | United Marine 1-204
    UIW-1-204
    Qty In Stock: 7
    Brand: United Motor Products
    Delco HVS V6 Tri-Pak Tune-Up Kit Learn More
    MSRP: $174.06 $122.13
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    Thunderbolt Big Block Tri-Pak Tune-Up Kit | United Marine 1-102
    UIW-1-102
    Qty In Stock: 18
    Brand: United Motor Products
    Thunderbolt Big Block Tri-Pak Tune-Up Kit Learn More
    MSRP: $133.68 $94.25
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  10. United Marine 116 8.1L Spark Plug Wire Set
    8.1 liter Spark Plug Wire Set | United Marine 116
    UIW-116
    Qty In Stock: 8
    Brand: United Motor Products

    8.1 liter Spark Plug Wire Set

    Learn More
    MSRP: $149.67 $114.99
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    Chris Craft Ford V8 Plug Wire Set | United Marine 131
    UIW-131
    Qty In Stock: 0
    Brand: United Motor Products
    Chris Craft Ford V8 Plug Wire Set Learn More
    MSRP: $89.10 $70.39
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    V8 Small Block Spark Plug Wire Set | United Marine 109
    UIW-109
    Qty In Stock: 41
    Brand: United Motor Products
    V8 Small Block Spark Plug Wire Set Learn More
    MSRP: $88.98 $68.79
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Items 1-12 of 57

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