Upper Unit Seal Kit 

Additional Details:

• For: #1 Units (including Alpha)(Also fits 888 stern drive)

Interchanges/Replaces

GLM

• 87500

Mallory

• 9-74303

Mercruiser Stern Drive

• 26-32511A1
• 26-32511B1

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-0894	GLM 31150 Mallory 9-60037 Mercruiser Stern Drive 27-55810 27-558101	1	Water Pocket Cover Gasket		N/A
18-2003	GLM 85030 Mallory 9-76102 Mercruiser Stern Drive 26-32080 26-36054 26-68493 26-823894 26-823894B	1	Oil Seal		N/A
18-2049	GLM 85020 Mallory 9-76111 Mercruiser Stern Drive 26-32511	1	Oil Seal		N/A
18-2056	Chrysler/Force/US Marine 26-66302 GLM 85060 Mallory 9-76130 Mercruiser Stern Drive 26-37259 26-89237 26-96503 26-965031 Mercury Marine 26-56394 26-66302	1	Oil Seal		N/A
18-2944	GLM 85140 Mallory 9-76512 Mercruiser Stern Drive 26-45577 26-455771 26-45577B 26-45577B1	1	Seal Ring Gasket		N/A
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	2	Drain Screw Gasket		N/A
18-3110	GLM 12830 Mallory 9-43604 Mercruiser Stern Drive 26-38970 Mercury Marine 26-29677 26-36557A1 26-38970	1	Water Pump Housing Bushing		N/A
18-7153	GLM 81180 Mallory 9-76505 Mercruiser Stern Drive 25-25439 Mercury Marine 25-25439 Mercury Race Outboard 25-25439 Mercury Race Sterndrive 25-25439 OMC Stern Drive 3852565 911851 Volvo Penta 3852565 997368	2	O-Ring		N/A
18-7161	GLM 80420 Mallory 9-76546 Mercruiser Stern Drive 25-32546 Mercury Marine 25-32546	1	O-Ring		N/A
18-7169	Chrysler/Force/US Marine 25-F24278 GLM 82380 Mallory 9-76551 Mercruiser Stern Drive 25-35984 25-70937 OMC Stern Drive 911686	1	O-Ring		N/A
18-7445	GLM 80190 Mallory 9-76568 Mercruiser Stern Drive 25-55801	1	O-Ring		N/A
18-0521	GLM 85150 Mercruiser Stern Drive 26-36557 Mercury Marine 26-36557	1	Water Tube Rubber Seal		N/A