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 Engine Distributor Caps

The distributor cap on an inboard engine is subject to a lot of stress and typically should be replaced every 4-5 years — or more often if you’re a frequent boater. Signs of wear such as engine misfiring, shaking, squealing and difficulty starting are also indicators you need a new cap. Marine Parts Source has a large collection of inboard distributor caps, including aftermarket and OEM components to ensure the best performance. Trust brands such as Sierra, Crusader and our own Powerline brand for the highest-quality distributor parts.

We have caps for dozens of engine and distributor models. Whether you have an older four-cylinder inboard engine or a new GM big block, you can find the right distributor cap at a great price. Select a product to learn more about it like what engines it’s compatible with and what part number(s) it replaces. Our staff has extensive knowledge of the parts we sell and can assist you — call 866-388-0390 or email support@marinepartssource.com.

Distributor Caps

Items 1-12 of 44

Set Descending Direction
View as List Grid
Page
  1. Small Image
    Westerbeke 20.0 BEG Distributor Cap | MMD Powerline 51960
    MMDW-51960
    Qty In Stock: 17
    Brand: MMD Powerline

    Westerbeke 20.0 BEG Distributor Cap

    Learn More
    MSRP: $33.75 $25.55
    Add to Wishlist
  2. Small Image
    Delco EST V8 Distributor Cap | Crusader RA108006
    CRU-RA108006
    Qty In Stock: 30
    Brand: Crusader
    Distributor cap for GM V8 marine engines with Delco EST electronic distributors. Learn More
    MSRP: $35.35 $29.44
    Add to Wishlist
  3. Small Image
    6-Cylinder Outboard Distributor Cap | CDI 994-4841
    CDI-994-4841
    Qty In Stock: 2
    Brand: CDI Electronics
    6-Cylinder Outboard Distributor Cap Learn More
    MSRP: $171.44 $134.35
    Add to Wishlist
  4. Crusader RA108003 Prestolite V8 Distributor Cap
    Prestolite V8 Distributor Cap | Crusader RA108003
    CRU-RA108003
    Qty In Stock: 18
    Brand: Crusader
    Prestolite V8 Distributor Cap Learn More
    MSRP: $49.90 $42.28
    Add to Wishlist
  5. Small Image
    Prestolite V8 Screw Down Distributor Cap | Sierra 18-5352
    SIERRA-18-5352
    Qty In Stock: 37
    Brand: Sierra

    Distributor cap for V8 Prestolite distributors using two screws to attach cap to distributor housing

    Learn More
    MSRP: $34.79 $22.58
    Add to Wishlist
  6. Volvo Penta 3853815 Prestolite V8 Distributor Cap
    Prestolite V8 Distributor Cap | Volvo Penta 3853815
    VOLVO-3853815
    Qty In Stock: 23
    Brand: Volvo Penta
    Prestolite V8 Distributor Cap Learn More
    MSRP: $59.50 $53.78
    Add to Wishlist
  7. Large Image
    Delco 4 Cylinder Distributor Cap | United Marine 420
    UIW-420
    Qty In Stock: 0
    Brand: United Motor Products
    Delco 4 Cylinder Distributor Cap Learn More
    MSRP: $14.70 $12.13
    Add to Wishlist
  8. Quicksilver 811635T 3 Distributor Cap
    Distributor Cap | Quicksilver 811635T3
    QS-811635T3
    Qty In Stock: 5
    Brand: Quicksilver

    Distributor Cap

    Learn More
    MSRP: $18.90 $13.49
    Add to Wishlist
  9. Small Image
    Mallory 4 Cylinder Distributor Cap | Sierra 18-5397
    SIERRA-18-5397
    Qty In Stock: 8
    Brand: Sierra

    Aftermarket distributor cap for OMC 2.3L Ford marine engines with Mallory distributors

    Learn More
    MSRP: $66.69 $42.59
    Add to Wishlist
  10. Small Image
    V8 Ford EFI Distributor Cap | Sierra 18-5248
    SIERRA-18-5248
    Qty In Stock: 8
    Brand: Sierra
    Aftermarket replacement distributor cap fits Ford V8 EFI engines. Learn More
    MSRP: $48.39 $31.38
    Add to Wishlist
  11. Small Image
    HVS Delco V8 Distributor Cap | Volvo Penta 3858975
    VOLVO-3858975
    Qty In Stock: 29
    Brand: Volvo Penta
    OE Volvo Penta flat distributor cap fits GM V8 marine engines with Delco HVS distributors. Learn More
    MSRP: $111.00 $98.67
    Add to Wishlist
  12. Small Image
    Prestolite V6 Screw Down Distributor Cap | Sierra 18-5353
    SIERRA-18-5353
    Qty In Stock: 7
    Brand: Sierra

    Distributor cap for V6 Prestolite distributors using two screws to attach cap to distributor housing

    Learn More
    MSRP: $46.69 $31.55
    Add to Wishlist

Items 1-12 of 44

Set Descending Direction
View as List Grid
Page
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.