Additional Details:

• Used with: 3/8-16 drain/fill screw found on all MerCruiser and most Mercury/Mariner O/B's
• Used in: most lower units and sea water pumps

Use With:

• 18-2944: Seal Ring Gasket

Interchanges/Replaces

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

Additional Details:

• Thread Size: 3/8" or 9.5mm - 16
• For: MerCruiser I,R,MR,Alpha One,TR,TRS & all O/Bs with 3/8-16 non-magnetic gear lube fill or vent screws

Use With:

• 18-2945: Drain Screw Gasket
• 18-2945-9: Drain Screw Gasket (Priced Per Pkg of 2)
• 18-29451-9: Drain Screw Gasket (Priced Per Pkg of 50)

Interchanges/Replaces

Chrysler/Force/US Marine

• 10-79953
• 10-79953A2
• 10-F50109
• F40109

GLM

• 22420

Mallory

• 9-72650

Mercruiser Stern Drive

• 10-28634
• 10-28634A1
• 10-79953
• 10-79953A2
• 10-79953Q04
• 10-79953Q2
• 816610A1
• 816610A2

Mercury Marine

• 10-20259
• 10-28634
• 10-28634A1
• 10-79953
• 10-79953A2
• 10-79953Q04
• 10-79953Q2

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2945	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	1	Drain Screw Gasket		N/A