HOLIDAY ALERT

We will be closing at 12 PM EST on Friday, April 18th, in observance of Good Friday and Easter.
Any orders placed after this time will be processed on Monday, April 21st.
Have a happy Easter weekend!

Weather Closure Alert

Due to severe weather, our White House, Tennesee location will be closed Wednesday the 19th.

All shipments from this location will resume on Thursday the 20th. Thank you for your patience!

WE WANT TO HEAR FROM YOU!

We strive to make improvements that make it easier to serve your boating needs.
We’d like to know more about you and how we can do the best job possible for you.
Please take the time to complete this brief 3-5 minute survey to help us serve you better.

FREE Ground Shipping on Orders over $100!  Exceptions apply - see details.

Toggle Nav
  • Sign In
  • Create an Account
My Cart
Search
Menu
Account
Settings
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 37-48 of 57

Set Descending Direction
View as List Grid
Page
  1. United Marine 219 Sparkplug Wire Set V6 Volvo HVS
    Sparkplug Wire Set V6 Volvo HVS | United Marine 219
    UIW-219
    Qty In Stock: 4
    Sparkplug Wire Set V6 Volvo HVS Learn More
    MSRP: $96.30 $76.99
    Add to Wishlist
  2. Large Image
    Thunderbolt V6 Spark Plug Wire Set | United Marine 111
    UIW-111
    Qty In Stock: 13
    Brand: United Motor Products
    Thunderbolt V6 Spark Plug Wire Set Learn More
    MSRP: $66.36 $44.99
    Add to Wishlist
  3. Large Image
    Spark Plug Wire Set GM V6 Conventional Ignition | United Marine 107
    UIW-107
    Qty In Stock: 5
    Brand: United Motor Products

    Custom tailored 8mm spark plug wire set for GM V6 engines using conventional ignition systems with 90 distributor cap boots and 90 degree spark plug boots.

    Learn More
    MSRP: $65.04 $47.99
    Add to Wishlist
  4. Large Image
    Thunderbolt V6 Tri-Pak Tune-Up Kit | United Marine 1-111
    UIW-1-111
    Qty In Stock: 18
    Brand: United Motor Products
    Thunderbolt V6 Tri-Pak Tune-Up Kit Learn More
    MSRP: $112.65 $87.41
    Add to Wishlist
  5. Harness Kit | United Marine 22752HK
    Harness Kit | United Marine 22752HK
    UIW-22752HK
    Qty In Stock: 5
    Brand: United Motor Products
    Harness Kit Learn More
    MSRP: $117.45 $83.99
    Add to Wishlist
  6. uiw1126_lg_1
    Delco EST Small Block Tri-Pak Tune Up Kit | United Marine 1-126
    UIW-1-126
    Qty In Stock: 27
    Brand: United Motor Products
    Delco EST Small Block Tri-Pak Tune Up Kit Learn More
    MSRP: $127.77 $92.01
    Add to Wishlist
  7. United Marine 140 4 Cylinder Spark Plug Wire Set
    4 Cylinder Spark Plug Wire Set | United Marine 140
    UIW-140
    Qty In Stock: 17
    Brand: United Motor Products
    Volvo Penta 4 Cylinder Spark Plug Wire Set Learn More
    MSRP: $63.54 $50.60
    Add to Wishlist
  8. Large Image
    V8 Big Block Spark Plug Wire Set | United Marine 110
    UIW-110
    Qty In Stock: 15
    Brand: United Motor Products
    V8 Big Block Spark Plug Wire Set Learn More
    MSRP: $89.97 $69.12
    Add to Wishlist
  9. Large Image
    Thunderbolt Small Block Spark Plug Wire Set | United Marine 103
    UIW-103
    Qty In Stock: 53
    Brand: United Motor Products
    Thunderbolt Small Block Spark Plug Wire Set Learn More
    MSRP: $83.97 $60.99
    Add to Wishlist
  10. Large Image
    Sparkplug Wire Set V6 Delco EST | United Marine 127
    UIW-127
    Qty In Stock: 10
    Brand: United Motor Products
    Sparkplug Wire Set V6 Delco EST Learn More
    MSRP: $72.60 $51.99
    Add to Wishlist
  11. United Marine 9363M GM V6 HVS Distributor
    GM V6 HVS Distributor | United Marine 9363M
    UIW-9363M
    Qty In Stock: 4

    Complete billet aluminum replacement HVS distributor assembly with cap and rotor for GM 4.3L marine engines using the high voltage switch ignition system.

    Learn More
    MSRP: $431.97 $355.98
    Add to Wishlist
  12. Image
    Chris Craft 454 Spark Plug Wire Set | United Marine 124
    UIW-124
    Qty In Stock: 0
    Brand: United Motor Products
    Chris Craft 454 Spark Plug Wire Set Learn More
    MSRP: $87.66 $72.31
    Add to Wishlist

Items 37-48 of 57

Set Descending Direction
View as List Grid
Page
Shop By
Now Shopping by
  1. Brand United Marine Remove This Item
Clear All
Shopping Options
My Wish List
Last Added Items
  1. Add to Cart
    Remove This Item
Go to Wish List
You have no items in your wish list.
© 2025 Marine Parts Source. All Rights Reserved.