Sierra / Mallory

Key Features:

• V-6

Interchanges/Replaces

GLM

• 33600

Johnson/Evinrude Outboard

• 321184

Mallory

• 9-60449

Key Features:

• Models with Power Trim

Interchanges/Replaces

GLM

• 23011

Volvo Penta

• 854031

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2939	GLM 23020 Volvo Penta 814356	1	Rubber Seal		N/A

Additional Details:

• Material: Stainless Steel
• Fits: MCM/MIE GM V-8 (454 & 502 cid) engines

Use With:

• 18-1989K: Thermostat Service Kit

Interchanges/Replaces

Mallory

• 9-42500

Mercruiser Stern Drive

• 861006A1
• 8M0061381

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-4264	GLM 21894 Mallory 9-40546 Mercruiser Stern Drive 22-32803 22-87543 FI5880010 Mercury Marine 22-32803	3	Pipe Plug
18-2917	GLM 31560 GM 3701777 Mallory 9-60007 9-60007-10 Mercruiser Stern Drive 27-33179 27-53045 27-530451 27-53045B1 F10077105 FI1101276 FI1101291 FI5000096 OMC Inboard 3701777 OMC Stern Drive 3701777	1	Thermostat Gasket		N/A
NSS	Mercruiser Stern Drive 23-806922	1	Sleeve	No Image	N/A

Additional Details:

• Fits: MCM/MIE GM V-6 & V-8 (305 & 350 cid)engines & Hi-Perf 454, 502 & 540 cid engines

Interchanges/Replaces

Barr

• MC2947441

GLM

• 13220

Mallory

• 9-42503
• 9-42506

Mercruiser Stern Drive

• 47441
• 47441A1

Osco

• MC55-TSB

Key Features:

• Models with Power Trim

Interchanges/Replaces

GLM

• 23010

Mallory

• 9-44003

Volvo Penta

• 832846

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2939	GLM 23020 Volvo Penta 814356	1	Rubber Seal		N/A

Additional Details:

• Temperature Rating: 145° (63 C)

Interchanges/Replaces

GLM

• 13381

Mallory

• 9-43004

Volvo Penta

• 875794
• 876305

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-3551	Chrysler Inboard 4142885 Crusader 96319 GLM 13030 Mallory 9-43013 Mercruiser Stern Drive 32728 35884 59137 59137A1 67464 8052731 8072521 807252T1 8M0089715 Osco 143-DEG Pleasurecraft RO26002E	1	Thermostat		N/A
18-2933	Mallory 9-60001 Volvo Penta 1317466 416033 418361	1	Thermostat Gasket		N/A
18-0398	GLM 35060 Mallory 9-60009 Mercruiser Stern Drive 27-33918 27-8M2021920 OMC Stern Drive 312797 3852111 Volvo Penta 3852111 835417 856347	1	Thermostat Gasket		N/A

Key Features:

• Includes sealing ring

Additional Details:

• Temperature Rating: 160° (71 C)

Interchanges/Replaces

Mallory

• 9-43009

Volvo Penta

• 3831426

Additional Details:

• Temperature Rating: 180° (82 C)

Interchanges/Replaces

Mallory

• 9-43010

Volvo Penta

• 875580

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2933	Mallory 9-60001 Volvo Penta 1317466 416033 418361	1	Thermostat Gasket		N/A

Key Features:

• For: 7.4L (1994-98), 8.2L (1998)

Additional Details:

• Temperature Rating: 140° (60 C)
• Thermostat: 0986506, 3853983

Interchanges/Replaces

Mallory

• 9-43026

OMC Stern Drive

• 3853983 + 312797 + 307239

Volvo Penta

• 3853983 + 3852071 + 835417

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-7170	Chrysler/Force/US Marine 25-33504 GLM 82200 Johnson/Evinrude Outboard 307239 Mallory 9-76502 Mercruiser Stern Drive 25-33504 Mercury Marine 25-33504 OMC Stern Drive 307239 3852071 Volvo Penta 3852071	1	O-Ring		N/A
18-0398	GLM 35060 Mallory 9-60009 Mercruiser Stern Drive 27-33918 27-8M2021920 OMC Stern Drive 312797 3852111 Volvo Penta 3852111 835417 856347	1	Thermostat Gasket		N/A
NSS	Volvo Penta 3853983	1	Thermostat	No Image	N/A

Additional Details:

• Temperature Rating: 160°F (71°C)

Interchanges/Replaces

Mallory

• 9-43028

Volvo Penta

• 3856961 + 835417 + 3852071

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-7170	Chrysler/Force/US Marine 25-33504 GLM 82200 Johnson/Evinrude Outboard 307239 Mallory 9-76502 Mercruiser Stern Drive 25-33504 Mercury Marine 25-33504 OMC Stern Drive 307239 3852071 Volvo Penta 3852071	1	O-Ring		N/A
18-0398	GLM 35060 Mallory 9-60009 Mercruiser Stern Drive 27-33918 27-8M2021920 OMC Stern Drive 312797 3852111 Volvo Penta 3852111 835417 856347	1	Thermostat Gasket		N/A
18-3554	GLM 13060 Mallory 9-43021 OMC Inboard 383307 OMC Stern Drive 379754 383307 3852216 3856961 Volvo Penta 3856961	1	Thermostat		N/A

Additional Details:

• Temperature Rating: 160°F

Interchanges/Replaces

Mallory

• 9-43100

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-3649	Crusader 97895 GLM 13100 Mallory 9-43002 Mercruiser Stern Drive 8052732 8072522 807252T2 8M0091470 8M0109441	1	Thermostat		N/A
18-2553	GLM 31460 Mallory 9-60005 Mercruiser Stern Drive 27-47510 27-47510Q Osco 47510	1	Thermostat Cover Gasket		N/A
18-2917	GLM 31560 GM 3701777 Mallory 9-60007 9-60007-10 Mercruiser Stern Drive 27-33179 27-53045 27-530451 27-53045B1 F10077105 FI1101276 FI1101291 FI5000096 OMC Inboard 3701777 OMC Stern Drive 3701777	1	Thermostat Gasket		N/A

Additional Details:

• Temperature Rating: 130°F

Interchanges/Replaces

GLM

• 13350

Mallory

• 9-43101

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-0182	GLM 30610 Johnson/Evinrude Outboard 310058 Mallory 9-60002 Mercury Marine 27-62386 27-62386001 Mercury Race Outboard 27-62386001	1	Thermostat Gasket		N/A
18-3553	GLM 13010 Mallory 9-43019 Mercury Marine 62981 66850 75692 75692B	1	Thermostat		N/A

Additional Details:

• Temperature Rating: 142°F
• Fits: 1983 & newer GM V-6 & V-8 engines with standard cooling

Interchanges/Replaces

GLM

• 13390

Mallory

• 9-43150

Mercruiser Stern Drive

• 807252Q4
• 807252T4
• 807252T7

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2552	GLM 31670 Mallory 9-60008 Mercruiser Stern Drive 27-331791 27-331792 27-33179B2	1	Thermostat Cover Gasket		N/A
18-2553	GLM 31460 Mallory 9-60005 Mercruiser Stern Drive 27-47510 27-47510Q Osco 47510	1	Thermostat Cover Gasket		N/A
18-2554	GLM 31630 Mallory 9-60006 Mercruiser Stern Drive 27-41812 27-41812B 27-41812Q 27-90556 Osco 41812	1	Thermostat Cover Gasket		N/A
18-2917	GLM 31560 GM 3701777 Mallory 9-60007 9-60007-10 Mercruiser Stern Drive 27-33179 27-53045 27-530451 27-53045B1 F10077105 FI1101276 FI1101291 FI5000096 OMC Inboard 3701777 OMC Stern Drive 3701777	1	Thermostat Gasket		N/A
18-3551	Chrysler Inboard 4142885 Crusader 96319 GLM 13030 Mallory 9-43013 Mercruiser Stern Drive 32728 35884 59137 59137A1 67464 8052731 8072521 807252T1 8M0089715 Osco 143-DEG Pleasurecraft RO26002E	1	Thermostat		N/A
18-7173	Chrysler/Force/US Marine 25-30224 GLM 82250 Johnson/Evinrude Outboard 310327 Mallory 9-76501 Mercruiser Stern Drive 25-30224 25-30224Q Mercury Marine 25-27018 25-30224 25-30224Q OMC Stern Drive 310327	1	O-Ring		N/A

Key Features:

• 140°F

Additional Details:

• Fits: 1982 & older Ford & GM V-8 engines w/standard cooling & 1996 & older hi-performance models
• Fits: engines with closed cooling

Interchanges/Replaces

GLM

• 13380

Mallory

• 9-43151

Mercruiser Stern Drive

• 807252Q3
• 807252T6

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2553	GLM 31460 Mallory 9-60005 Mercruiser Stern Drive 27-47510 27-47510Q Osco 47510	1	Thermostat Cover Gasket		N/A
18-2834	Barr MC472760208 GLM 31620 Mallory 9-60011 Mercruiser Stern Drive 27-60208	1	Thermostat Cover Gasket		N/A
18-2844	Barr MC472748818 GLM 31510 Mallory 9-60010 Mercruiser Stern Drive 27-48818 27-488181 27-48818Q01	1	Thermostat Gasket		N/A
18-2917	GLM 31560 GM 3701777 Mallory 9-60007 9-60007-10 Mercruiser Stern Drive 27-33179 27-53045 27-530451 27-53045B1 F10077105 FI1101276 FI1101291 FI5000096 OMC Inboard 3701777 OMC Stern Drive 3701777	1	Thermostat Gasket		N/A
18-3551	Chrysler Inboard 4142885 Crusader 96319 GLM 13030 Mallory 9-43013 Mercruiser Stern Drive 32728 35884 59137 59137A1 67464 8052731 8072521 807252T1 8M0089715 Osco 143-DEG Pleasurecraft RO26002E	1	Thermostat		N/A

Additional Details:

• Temperature Rating: 142°F

Interchanges/Replaces

GLM

• 13380

Mallory

• 9-43152

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2553	GLM 31460 Mallory 9-60005 Mercruiser Stern Drive 27-47510 27-47510Q Osco 47510	1	Thermostat Cover Gasket		N/A
18-2554	GLM 31630 Mallory 9-60006 Mercruiser Stern Drive 27-41812 27-41812B 27-41812Q 27-90556 Osco 41812	1	Thermostat Cover Gasket		N/A
18-2834	Barr MC472760208 GLM 31620 Mallory 9-60011 Mercruiser Stern Drive 27-60208	1	Thermostat Cover Gasket		N/A
18-2844	Barr MC472748818 GLM 31510 Mallory 9-60010 Mercruiser Stern Drive 27-48818 27-488181 27-48818Q01	1	Thermostat Gasket		N/A
18-3551	Chrysler Inboard 4142885 Crusader 96319 GLM 13030 Mallory 9-43013 Mercruiser Stern Drive 32728 35884 59137 59137A1 67464 8052731 8072521 807252T1 8M0089715 Osco 143-DEG Pleasurecraft RO26002E	1	Thermostat		N/A

Additional Details:

• Temperature Rating: 140° F
• Fits: 1998 & older MCM GM in-line 4 & 6 cyl. engines

Interchanges/Replaces

GLM

• 13370

Mallory

• 9-43153

Mercruiser Stern Drive

• 59078T3

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2831	Barr MC472747590 GLM 31430 Mallory 9-60012 Mercruiser Stern Drive 27-47590 27-475901 27-47590B1	1	Thermostat Cover Gasket		N/A
18-3550	Chrysler/Force/US Marine F84068 F84068-1 F84068-2 F85068-2 GLM 13020 Mallory 9-43020 Mercruiser Stern Drive 59078 59078A1 59078B	1	Thermostat		N/A

Key Features:

• For: Ford 302 / 351 CID Engines, Raw Water Cooled

Additional Details:

• Temperature Rating: 142°

Interchanges/Replaces

Crusader

• 97361

GLM

• 13410

Mallory

• 9-43154

Pleasurecraft

• RP026002E

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-3551	Chrysler Inboard 4142885 Crusader 96319 GLM 13030 Mallory 9-43013 Mercruiser Stern Drive 32728 35884 59137 59137A1 67464 8052731 8072521 807252T1 8M0089715 Osco 143-DEG Pleasurecraft RO26002E	1	Thermostat		N/A
18-0875	Crusader 97361	1	Thermostat Gasket		N/A
18-0878	Pleasurecraft RM0003	1	Thermostat Cover Gasket		N/A
18-0665	Indmar 985006 S985006	1	Thermostat Gasket		N/A

Additional Details:

• Temperature Rating: 120°F
• Fits: Various Mercury/Mariner 70-125 hp 2 cycle outboards (1987 and newer)

Interchanges/Replaces

GLM

• 13124

Mallory

• 9-43155

Mercury Marine

• 803061T1

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-0182	GLM 30610 Johnson/Evinrude Outboard 310058 Mallory 9-60002 Mercury Marine 27-62386 27-62386001 Mercury Race Outboard 27-62386001	1	Thermostat Gasket		N/A
18-0339	GLM 32820 Mallory 9-60004 Mercury Marine 27-43006 2 27-430061 27-430063 27-430065 27-430066 27-430067 27-430068	1	Thermostat Gasket		N/A
18-3549	GLM 13120 Mallory 9-43014 Mercury Marine 14586 Sears 14586	1	Thermostat		N/A

Interchanges/Replaces

GLM

• 13430

Mallory

• 9-43156

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2858	Barr OMC47314809 GLM 33440 Mallory 9-60016 OMC Stern Drive 314809 3852127 Volvo Penta 3852127	1	Thermostat Gasket		N/A
18-2947	GLM 33840 Mallory 9-60017 OMC Stern Drive 310913	1	Thermostat Gasket		N/A
18-3554	GLM 13060 Mallory 9-43021 OMC Inboard 383307 OMC Stern Drive 379754 383307 3852216 3856961 Volvo Penta 3856961	1	Thermostat		N/A
18-7170	Chrysler/Force/US Marine 25-33504 GLM 82200 Johnson/Evinrude Outboard 307239 Mallory 9-76502 Mercruiser Stern Drive 25-33504 Mercury Marine 25-33504 OMC Stern Drive 307239 3852071 Volvo Penta 3852071	1	O-Ring		N/A
18-0929	GLM 34260 Johnson/Evinrude Outboard 313416 OMC Stern Drive 313416 3852120 Volvo Penta 3852120	1	Thermostat Gasket		N/A
18-0398	GLM 35060 Mallory 9-60009 Mercruiser Stern Drive 27-33918 27-8M2021920 OMC Stern Drive 312797 3852111 Volvo Penta 3852111 835417 856347	1	Thermostat Gasket		N/A

Additional Details:

• Fits: 1987 & newer GM engines with standard cooling requiring a 160° thermostat
• Temperature rating: 160°F

Interchanges/Replaces

GLM

• 13101

Mallory

• 9-43157

Mercruiser Stern Drive

• 807252Q5
• 807252T8

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2552	GLM 31670 Mallory 9-60008 Mercruiser Stern Drive 27-331791 27-331792 27-33179B2	1	Thermostat Cover Gasket		N/A
18-2553	GLM 31460 Mallory 9-60005 Mercruiser Stern Drive 27-47510 27-47510Q Osco 47510	1	Thermostat Cover Gasket		N/A
18-2844	Barr MC472748818 GLM 31510 Mallory 9-60010 Mercruiser Stern Drive 27-48818 27-488181 27-48818Q01	1	Thermostat Gasket		N/A
18-2917	GLM 31560 GM 3701777 Mallory 9-60007 9-60007-10 Mercruiser Stern Drive 27-33179 27-53045 27-530451 27-53045B1 F10077105 FI1101276 FI1101291 FI5000096 OMC Inboard 3701777 OMC Stern Drive 3701777	1	Thermostat Gasket		N/A
18-3649	Crusader 97895 GLM 13100 Mallory 9-43002 Mercruiser Stern Drive 8052732 8072522 807252T2 8M0091470 8M0109441	1	Thermostat		N/A
18-7173	Chrysler/Force/US Marine 25-30224 GLM 82250 Johnson/Evinrude Outboard 310327 Mallory 9-76501 Mercruiser Stern Drive 25-30224 25-30224Q Mercury Marine 25-27018 25-30224 25-30224Q OMC Stern Drive 310327	1	O-Ring		N/A
18-0398	GLM 35060 Mallory 9-60009 Mercruiser Stern Drive 27-33918 27-8M2021920 OMC Stern Drive 312797 3852111 Volvo Penta 3852111 835417 856347	1	Thermostat Gasket		N/A