Powerhead Gasket - Mercury

Key Features:

• Does not Include Head Gaskets

Interchanges/Replaces

GLM

• 39520

Mallory

• 9-64204

Mercury Marine

• 27-815791A90
• 27-815791A92
• 27-815809A90
• 27-815810A90

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-0135	GLM 32880 Mercury Marine 27-78246 27-782461	2	Adapter Cover Gasket		N/A
18-0182	GLM 30610 Johnson/Evinrude Outboard 310058 Mallory 9-60002 Mercury Marine 27-62386 27-62386001 Mercury Race Outboard 27-62386001	2	Thermostat Gasket		N/A
18-0384	GLM 32350 Mercury Marine 27-817533 27-89221 27-892211 27-8M0027781	3	Carburetor Gasket		N/A
18-0641	GLM 37590 Mercury Marine 27-828292 Mercury Sport Jet 27-828292	3	Carburetor Mounting Gasket		N/A
18-0642	GLM 37560 Mallory 9-60051 Mercury Marine 27-19050 27-190502 27-190503 27-190505	1	Divider Plate Gasket		N/A
18-0643	GLM 37570 Mercury Marine 27-183071 27-183076	1	Powerhead Base Gasket		N/A
18-0644	GLM 37530 Mercury Marine 27-146972 Mercury Sport Jet 27-146972	1	Reed Plate Gasket		N/A
18-0645	GLM 37540 Mallory 9-60056 Mercury Marine 27-167371 Mercury Sport Jet 27-167371	1	Adapter Plate Gasket		N/A
18-0646	GLM 37550 Mercury Marine 27-813859 27-883775 Mercury Sport Jet 27-813859 27-881034	1	Reed Plate Gasket		N/A
18-0838	Yamaha Outboard 93210-37M25-00	1	O-Ring		N/A
18-0858	GLM 81430 Mallory 9-76516 Mercruiser Stern Drive 25-54029 Mercury Marine 25-54029 Mercury Sport Jet 25-54029	1	O-Ring		N/A
18-0860	GLM 81520 Mercruiser Stern Drive 25-62700 Mercury Marine 25-62700 Mercury Sport Jet 25-62700	1	O-Ring		N/A
18-0936	GLM 31990 Mallory 9-60057 Mercury Marine 27-67624 27-78690 27-78690002 Mercury Sport Jet 27-78690 27-78690002	2	Relief Valve Plate Gasket		N/A
18-2509	GLM 31690 Mercury Marine 27-67751	3	Carburetor Mounting Gasket		N/A
18-2511	GLM 32510 Mercury Marine 27-67074 27-88727 27-99173 27-99173 2 27-991731 27-991734	1	Drive Shaft Housing to Exhaust Plate Gasket		N/A
18-2513	GLM 30890 Mallory 9-60049 9-60050 Mercury Marine 27-11338 27-67208 Mercury Sport Jet 27-11338	2	Crankcase Gasket (Cyl. Block Sealing V-6)		N/A
18-2914	GLM 31010 Mallory 9-60034 Mercruiser Stern Drive 27-32433 27-856081 27-8M0090319 Mercury Marine 27-30603 27-32433 27-85608 27-856081 27-8M0090319	1	Water Pump Gasket		N/A
18-2915	GLM 31020 Mallory 9-60035 Mercruiser Stern Drive 27-32434 27-856091 27-858524 Mercury Marine 27-30604 27-32434 27-85609 27-856091 27-858524	1	Water Pump Gasket		N/A
18-2919	GLM 31050 Mallory 9-60031 Mercruiser Stern Drive 27-426311 Mercury Marine 27-42631 27-426311	1	Water Pump Gasket		N/A
18-3110	GLM 12830 Mallory 9-43604 Mercruiser Stern Drive 26-38970 Mercury Marine 26-29677 26-36557A1 26-38970	2	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	1	O-Ring		N/A
18-7157	GLM 83410 Mallory 9-76542 Mercruiser Stern Drive 25-29976 Mercury Marine 25-29976	1	O-Ring		N/A
18-7159	GLM 83440 Mallory 9-76544 Mercruiser Stern Drive 25-31534 25-48451 Mercury Marine 25-31534	1	O-Ring		N/A
18-7174	Chrysler/Force/US Marine 25-45711 25-F455342 GLM 81140 Johnson/Evinrude Outboard 326649 553127 Mallory 9-76553 Mercruiser Stern Drive 25-45711 Mercury Marine 25-45711 Mercury Sport Jet 25-45711 OMC Stern Drive 326649 553127 910582	1	O-Ring		N/A
18-7176	Chrysler/Force/US Marine 25-90011 25-F74305 F694555 F74035 F74305-1 GLM 81390 Mallory 9-76554 Mercruiser Stern Drive 25-896523 25-90011 Mercury Marine 25-896523 25-90011	1	O-Ring		N/A
18-8305	Mercury Marine 26-814754 42838 69668 88726 Mercury Race Outboard 428381 69668 Mercury Sport Jet 26-814754	1	Divider Plate Seal		N/A
18-2506-1	Mallory 9-60046 Mercury Marine 27-99176 27-991762 27-991763 27-991764 Mercury Race Outboard 27-99176	1	Exhaust Plate Gasket		N/A
18-0970	Chrysler/Force/US Marine 27-987691 GLM 32960 Mallory 9-60054 Mercury Marine 27-98769 27-987691 Mercury Sport Jet 27-987691	1	Fuel Pump Base Gasket		N/A
18-7817	Chrysler/Force/US Marine 21-42990A10 21-42990A7 21-42990A8 GLM 40290 Mercury Marine 21-42990A1 21-42990A10 21-42990A11 21-42990A2 21-42990A3 21-42990A4 21-42990A5 21-42990A6 21-42990A7 21-42990A8 21-42990A9 21-857005A1 Mercury Sport Jet 21-42990A11 21-857005A1	1	Fuel Pump Kit		N/A

Interchanges/Replaces

GLM

• 31640

Mallory

• 9-60058

Mercury Marine

• 27-37976
• 27-62860
• 27-628601

Interchanges/Replaces

GLM

• 31980

Mallory

• 9-60059

Mercury Marine

• 27-76589
• 27-78623
• 27-88451
• 27-884511