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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!

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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!

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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 13-24 of 44

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    Delco 4 Cylinder Distributor Cap | Sierra 18-5385
    SIERRA-18-5385
    Qty In Stock: 9
    Brand: Sierra
    Aftermarket distributor cap fits 4 cylinder marine engines with Delco conventional ignition distributors. Learn More
    MSRP: $23.19 $15.69
    Add to Wishlist
  2. Small Image
    Delco Inline 6 Cylinder Distributor Cap | Sierra 18-5386
    SIERRA-18-5386
    Qty In Stock: 2
    Brand: Sierra
    Distributor cap for 6 cylinder inline marine engines with Delco conventional ignition distributors. Learn More
    MSRP: $30.29 $21.84
    Add to Wishlist
  3. Sierra 18-5396 Thunderbolt V6 Distributor Cap
    Thunderbolt V6 Distributor Cap | Sierra 18-5396
    SIERRA-18-5396
    Qty In Stock: 13
    Brand: Sierra

    Distributor cap for Mercruiser V6 marine engines with Thunderbolt ignitions

    Learn More
    MSRP: $33.09 $21.47
    Add to Wishlist
  4. Quicksilver 808483T3 Distributor Cap
    Distributor Cap | Quicksilver 808483T3
    QS-808483T3
    Qty In Stock: 9
    Brand: Quicksilver

    Distributor Cap

    Learn More
    MSRP: $41.24 $37.49
    Add to Wishlist
  5. Billet Male Distributor Cap
    Billet Male Distributor Cap | Pertronix D651710
    IG-D651710
    Qty In Stock: 1
    Brand: Pertronix
    Billet Male Distributor Cap Learn More
    MSRP: $75.85 $68.95
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  6. Small Image
    Delco EST V6 Distributor Cap | Sierra 18-5362
    SIERRA-18-5362
    Qty In Stock: 8
    Brand: Sierra

    Distributor cap for GM V6 marine engines with Delco EST module-in-cap distributors

    Learn More
    MSRP: $33.79 $24.27
    Add to Wishlist
  7. Bosch Distributor Cap | Volvo Penta 870690
    Bosch Distributor Cap | Volvo Penta 870690
    VOLVO-870690
    Qty In Stock: 0
    Brand: Volvo Penta
    Bosch Distributor Cap Learn More
    MSRP: $52.30 $51.28
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  8. Small Image
    Westerbeke 20.0 BEG Distributor Cap | MMD Powerline 51960
    MMDW-51960
    Qty In Stock: 14
    Brand: MMD Powerline

    Westerbeke 20.0 BEG Distributor Cap

    Learn More
    MSRP: $33.75 $25.55
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  9. Distributor Cap V8 Flame Thrower Distributor | Pertronix D651700
    Distributor Cap V8 Flame Thrower Distributor | Pertronix D651700
    IG-D651700
    Qty In Stock: 7
    Brand: Pertronix

    Replacement black distributor cap with female terminals for Pertronix Flame-Thrower 8 cylinder billet distributors.

    Learn More
    MSRP: $64.19 $58.35
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  10. Small Image
    Mallory 4 Cylinder Distributor Cap | Sierra 18-5397
    SIERRA-18-5397
    Qty In Stock: 6
    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
  11. 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
  12. SM Quicksilver 815407Q02
    Thunderbolt V6 Cap | Quicksilver 815407Q02
    QS-815407Q02
    Qty In Stock: 6
    V6 Distributor Cap Learn More
    MSRP: $41.33 $39.26
    Add to Wishlist

Items 13-24 of 44

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