Powerhead Gasket Set 

Interchanges/Replaces

GLM

• 39250

Mallory

• 9-64201
• 9-64212

Mercury Marine

• 27-11338A85
• 27-11338A88
• 27-89221A32
• 27-89221A84
• 27-89221A85
• 27-89221A88

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-0129	GLM 30670 Mallory 9-60062 Mercury Marine 27-65744 27-657441 27-657442 27-657443	6	Reed Block Gasket		N/A
18-0135	GLM 32880 Mercury Marine 27-78246 27-782461	1	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
18-0359	GLM 30740 Mercury Marine 27-67275 27-672751	1	Induction Silencer Cover Gasket		N/A
18-0384	GLM 32350 Mercury Marine 27-817533 27-89221 27-892211 27-8M0027781	3	Carburetor Gasket		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
18-0952	GLM 32330 Mercruiser Stern Drive 27-88907003 Mercury Marine 27-88907 27-88907003 Mercury Sport Jet 27-88907	2	Relief Valve Plate Gasket		N/A
18-2501	GLM 31680 Mallory 9-60060 Mercury Marine 27-67738 27-93536 27-935361	1	Reed Block Housing Gasket		N/A
18-2502	GLM 32150 Mercury Marine 27-87396 27-90484 27-904841 Mercury Race Outboard 27-90484 27-904841	2	Divider Plate Gasket		N/A
18-2503	GLM 32530 Mercury Marine 27-78068 27-99177 27-991771 27-991772	1	Drive Shaft Housing to Exhaust Plate Gasket		N/A
18-2509	GLM 31690 Mercury Marine 27-67751	3	Carburetor Mounting Gasket		N/A
18-2510	GLM 32450 Mercury Marine 27-96761 27-967611	1	Reed Block Housing 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
18-2803	GLM 32120 Mercury Marine 27-90430 27-904301	3	Carburetor Mounting Gasket		N/A
18-2808	GLM 32440 Mercury Marine 27-96278 Mercury Race Outboard 27-96278	2	Cylinder Cover Gasket		N/A
18-2826	GLM 31040 Mallory 9-60036 Mercruiser Stern Drive 27-33146 27-856704 Mercury Marine 27-33146 27-85610 27-856101	1	Water Pump Base Gasket		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
18-3862	GLM 35860 Mallory 9-63853 Mercury Marine 27-41246 27-41246-1 27-412462 27-41247 27-41247T01 27-96543	2	Head Gasket		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 Mercr iser Stern Drive 25-31534 25-48451 Mercury Marine 25-31534	1	O-Ring		N/A
18-7162	Chrysler/Force/US Marine 25-33145 GLM 82260 Johnson/Evinrude Outboard 302337 Mallory 9-76547 Mercruiser Stern Drive 25-32424 25-33145 Mercury Marine 25-33145 Mercury Sport Jet 25-33145 OMC Stern Drive 302337 302377 3852044 Sears 25-33145 Volvo Penta 3852044	1	O-Ring		N/A
18-7164	GLM 81260 Johnson/Evinrude Outboard 302537 Mercruiser Stern Drive 25-33466 25-67675 25-846356 27-898101789 Mercury Marine 25-33466 25-67675 25-846356	1	O-Ring		N/A
18-7168	GLM 80120 Johnson/Evinrude Outboard 202893 Mallory 9-76550 Mercruiser Stern Drive 25-21720 25-26834 25-48171 25-801334436 Mercury Marine 25-20587 25-21720 25-26834 25-48171 25-801334436 OMC Stern Drive 202893 3852033 Volvo Penta 3852033	4	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	2	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
18-7406	GLM 80100 OMC Stern Drive 3852523 911311 Volvo Penta 3852523	1	O-Ring		N/A
18-7411	GLM 81240 Johnson/Evinrude Outboard 321921 Mercruiser Stern Drive 25-35480 25-8M2000816 Mercury Marine 25-35480 25-47386	1	O-Ring		N/A
18-7421	GLM 80070 Mercury Marine 25-16524 25-20415	2	O-Ring		N/A
18-7812	GLM 40360 Mallory 9-37751 Mercury Marine 66599A2 89031A2	1	Fuel Pump Kit		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
18-2508-1	GLM 32540 Mercury Marine 27-96440 27-99776 27-997761	2	Exhaust Plate Gasket		N/A
9-76560	Mercury Marine 25-38099	1	O-RING		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
NSS	Mercury Marine 27-672741	1	Gasket, Choke Plate to Carburetor	No Image	N/A