Sierra Drain Screw Gasket 2-Pack

Sierra 18-2945-9 Drain Screw Gasket (2 pack)

This Sierra 18-2945 Drain Screw Gasket is used with 3/8-16 drain/fill screw found on all MerCruiser and most Mercury/Mariner O/Bs. This gasket is used in most lower units and sea water pumps.

Sold as a 2 pack

Interchangeable with:

Chrysler/Force/US Marine

12-19183

F50556

F8077

F8186

Johnson/Evinrude Outboard

307552

Mallory

9-60101

9-60102

MerCruiser Stern Drive

12-19183

12-191832

12-191833

12-19183B

12-20260

12-20260B

Mercury Marine

12-19183

12-191832

12-191833

12-20260

Frequently Asked Questions

• What is the Sierra 18-2945-9 Drain Screw Gasket used for? The Sierra 18-2945-9 Drain Screw Gasket is designed for use with 3/8-16 drain and fill screws found on all MerCruiser and most Mercury/Mariner outboards. It is used in most lower units and seawater pumps to provide the gasket for the applicable drain or fill screw.
• Does the Sierra 18-2945-9 Drain Screw Gasket fit MerCruiser and Mercury outboards? Yes. The gasket is specified for use with the 3/8-16 drain/fill screw found on all MerCruiser and most Mercury/Mariner outboards. It is also used in most lower units and seawater pumps. Verify the drain or fill screw size and application before installation.
• How many Sierra 18-2945-9 Drain Screw Gaskets are included? The Sierra 18-2945-9 Drain Screw Gasket is sold as a 2-pack, providing two gaskets for applicable 3/8-16 drain and fill screw applications. The gaskets are intended for use in most lower units and seawater pumps as specified for this product.
• What drain screw part numbers is the Sierra 18-2945-9 interchangeable with? The Sierra 18-2945-9 is interchangeable with listed drain screw gasket part numbers from Chrysler/Force/US Marine, Johnson/Evinrude, Mallory, MerCruiser, and Mercury Marine. These include Chrysler/Force/US Marine 12-19183, F50556, F8077, and F8186, plus Johnson/Evinrude 307552 and the listed Mallory, MerCruiser, and Mercury Marine numbers.
• Can the Sierra 18-2945-9 Drain Screw Gasket be used in lower units and seawater pumps? Yes. The product description specifies that this gasket is used in most lower units and seawater pumps. It is designed for the applicable 3/8-16 drain/fill screw applications, so verify that your equipment uses the specified screw before using this gasket.