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
Engine Parts & Gaskets

Engine Parts & Gaskets

Items 1-12 of 106

Set Descending Direction
View as List Grid
Page
  1. Small Image
    Mercruiser Volvo Power Steering Pump | Sierra 18-7508
    SIERRA-18-7508
    Qty In Stock: 17
    Brand: Sierra
    Aftermarket power steering pump assembly fits various Mercruiser and Volvo Penta marine engines. Learn More
    MSRP: $799.99 $507.46
    Add to Wishlist
  2. Small Image
    Cobra SX Engine Coupler | Sierra 18-21751
    SIERRA-18-21751
    Qty In Stock: 11
    Brand: Sierra
    Aftermarket coupler connects OMC & Volvo Penta GM engines to stern drives. Learn More
    MSRP: $326.09 $208.52
    Add to Wishlist
  3. Small Image
    GM 3.0L Cylinder Head Gasket | Sierra 18-2946
    SIERRA-18-2946
    Qty In Stock: 26
    Brand: Sierra
    Seals cylinder head to engine block on GM 181 cu. in. marine engines. Learn More
    MSRP: $37.59 $23.99
    Add to Wishlist
  4. Small Image
    Cobra SX Engine Coupler | Sierra 18-21752-1
    SIERRA-18-21752-1
    Qty In Stock: 23
    Brand: Sierra
    Aftermarket coupler connects OMC & Volvo Penta GM V6 & V8 engines to stern drives. Learn More
    MSRP: $351.69 $224.91
    Add to Wishlist
  5. Vortech Head Gasket Set
    Vortech Head Gasket Set | Sierra 18-1254
    SIERRA-18-1254
    Qty In Stock: 7
    Brand: Sierra
    Vortech Head Gasket Set Learn More
    MSRP: $210.29 $136.41
    Add to Wishlist
  6. Small Image
    GM Small Block Valve Cover Gasket | Sierra 18-0664
    SIERRA-18-0664
    Qty In Stock: 11
    Brand: Sierra
    Seals valve cover to cylinder head on GM 305 and 350 cu. in. marine engines with center bolt valve covers. Learn More
    MSRP: $31.79 $20.28
    Add to Wishlist
  7. Small Image
    14 inch GM Flywheel Ring Gear | Sierra 18-4516
    SIERRA-18-4516
    Qty In Stock: 27
    Brand: Sierra

    Ring gear with 168 teeth that fits GM engines built by a variety of marine engine manufacturers that use a 14 inch flywheel.

    Learn More
    MSRP: $71.99 $47.05
    Add to Wishlist
  8. Large Image
    Small Block Stamped Steel Oil Pan | Sierra 18-0612
    SIERRA-18-0612
    Qty In Stock: 10
    Brand: Sierra
    Used on Mercruiser GM 305 and 350 CID marine engines with a 1 piece rear main seal. Learn More
    MSRP: $319.19 $229.79
    Add to Wishlist
  9. Sierra 18-3832 Head Gasket
    Head Gasket | Sierra 18-3832
    SIERRA-18-3832
    Qty In Stock: 1
    Brand: Sierra
    Head Gasket Learn More
    MSRP: $43.59 $22.91
    Add to Wishlist
  10. Small Image
    V-Belt | Sierra 18-15415
    SIERRA-18-15415
    Qty In Stock: 1
    Brand: Sierra
    V-Belt Learn More
    MSRP: $26.99 $17.45
    Add to Wishlist
  11. Small Image
    V-Belt | Sierra 18-15470
    SIERRA-18-15470
    Qty In Stock: 4
    Brand: Sierra

    V-Belt with 47 inches of effective length.

    Learn More
    MSRP: $34.99 $22.88
    Add to Wishlist
  12. Small Image
    4.3L Intake Manifold Gasket Set | Sierra 18-1238
    SIERRA-18-1238
    Qty In Stock: 0
    Brand: Sierra
    4.3L Intake Manifold Gasket Set Learn More
    MSRP: $48.79 $31.21
    Add to Wishlist

Items 1-12 of 106

Set Descending Direction
View as List Grid
Page
Shop By
Shopping Options
Category
  1. Powerhead Gasket Sets 1
  2. Engine Overhaul Gasket Sets 1
  3. Cylinder Heads 0
  4. Head Gaskets 23
  5. Head Sets 3
  6. Valve Cover Gaskets 4
  7. Push Rod & Lifter Cover Gaskets 1
  8. Timing Chain Gaskets 2
  9. Intake Manifold Gaskets 7
  10. Miscellaneous Gaskets & Seals 15
  11. Welch & Freeze Plugs 2
  12. Belts 25
  13. Pulleys 2
  14. Power Steering Pumps 1
  15. Power Steering Coolers 1
  16. Oil Pans 2
  17. Oil Pan Gaskets 4
  18. Ring Gears 1
  19. Engine Couplers 6
  20. Engine Mounts 2
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.