Please check notes in each part listing to ensure the Oil Drain Plug is correct for your 1977 MERCURY MONARCH with a 4.1L 250 1BBL engine. DORMAN & FRAM are competing brands, and each brand's Oil Drain Plug may be interchangeable. Special restrictions like "California only" or "with sport package" may indicate a Oil Drain Plug fits only certain 1977 MERCURY MONARCH models.
Clicking a "More Info" link will display a picture and/or other details about that Oil Drain Plug in a separate window (you may need to turn off your pop-up-blocking software for this to work).
After choosing a Oil Drain Plug, click the "Add Part" button. Shipping costs will be shown on the Shopping Cart page. You may use your browser's Back button, or click on "Find More Parts", to find more Engine parts, other MERCURY MONARCH parts, or parts for a different vehicle. Please try our Interactive Catalog (click red Start button above) for faster searching. Both catalogs use the same shopping cart, so any auto parts you've already chosen for your 1977 MERCURY will not be lost if you switch.
