Key Features:

• Includes sealing ring

Additional Details:

• Temperature Rating: 160° (71 C)

Interchanges/Replaces

Mallory

• 9-43009

Volvo Penta

• 3831426

Additional Details:

• Nominal OD Size: 7/16" or 11.3mm

Interchanges/Replaces

Johnson/Evinrude Outboard

• 349516

Oetiker

• 16700007

Key Features:

• 160°

Additional Details:

• Fits: GM V-6 & V-8 engines with closed cooling (1998 & newer)

Interchanges/Replaces

Mercruiser Stern Drive

• 99155T1

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-3555	GLM 13040 Mallory 9-43001 9-43016 Mercruiser Stern Drive 991551 99155A1 99155T2	1	Thermostat		N/A
18-1508	GLM 85860 Mercruiser Stern Drive 25-807134 25-8071341	1	Thermostat Seal		N/A

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-3536	Mercury Marine 833072 833072003	2	Thermostat		N/A
18-3675	Mercury Marine 27-850318 27-8503181 Mercury Sport Jet 27-8503181	2	Thermostat 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

Additional Details:

• Temperature Rating: 60° Celcius

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-3541	Mallory 9-43037 Yamaha Outboard 66M-12411-00-00 66M-12411-01-00 6G8-12411-00-00 6G8-12411-01-00 6G8-12411-02-00 6G8-12411-03-00	1	Thermostat		N/A
18-0835	Mercury Marine 27-824853 27-8248531 Yamaha Outboard 62Y-12414-00-00 65W-12414-00-00 6H2-12414-00-00 6H2-12414-A1-00	1	Thermostat Gasket		N/A

Additional Details:

• Temperature Rating: 180° (82 C)

Interchanges/Replaces

Volvo Penta

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
18-7181	GLM 45060 Volvo Penta 925091 975672	1	O-Ring		N/A

Additional Details:

• Temperature Rating: 160° (71 C)

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-3558	GLM 13070 OMC Stern Drive 3853799 982554 Volvo Penta 3853799	1	Thermostat		N/A
18-0164	GLM 31340 Mallory 9-60074 Mercruiser Stern Drive 27-8146801 OMC Stern Drive 311069 3789161 3852096 Volvo Penta 3852096 Yamaha Sterndrive GM 3789161 YSC-13080-00-0C	1	Thermostat Housing Gasket		N/A
NSS	Mercruiser Stern Drive 25-805063	1	O-Ring	No Image	N/A

Additional Details:

• Temperature Rating: 160°F

Interchanges/Replaces

GLM

• 13400

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2555	GLM 32100 Mercruiser Stern Drive 27-89656 27-896561	1	Thermostat Cover Gasket		N/A
18-2843	Barr MC472774830 GLM 31840 Mercruiser Stern Drive 27-74830	1	Thermostat Gasket		N/A
18-3552	Crusader 96358 GLM 13050 Mallory 9-43000 Mercruiser Stern Drive 76270 76270T	1	Thermostat		N/A

Additional Details:

• Temperature Rating: 160° F

Interchanges/Replaces

GLM

• 13420

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2555	GLM 32100 Mercruiser Stern Drive 27-89656 27-896561	1	Thermostat Cover Gasket		N/A
18-3555	GLM 13040 Mallory 9-43001 9-43016 Mercruiser Stern Drive 991551 99155A1 99155T2	1	Thermostat		N/A

Additional Details:

• Temperature Rating: 160°F
• For: Fresh Water Cooling
• Fits: 470/485 models (s/n 6218036 and below)

Use With:

• 18-3652: Thermostat Kit

Interchanges/Replaces

Crusader

• 96358

GLM

• 13050

Mallory

• 9-43000

Mercruiser Stern Drive

• 76270
• 76270T

Additional Details:

• Temperature Rating: 160°F
• Fits: 1998 & newer GM V-6 & V-8 engines with closed cooling

Use With:

• 18-3568: Thermostat Kit
• 18-3667: Thermostat Kit

Interchanges/Replaces

GLM

• 13040

Mallory

• 9-43001
• 9-43016

Mercruiser Stern Drive

• 991551
• 99155A1
• 99155T2