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

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: R, MR, Alpha One & Gen II drives (s/n 6225577 & Up) (1983 & Up)

Interchanges/Replaces

GLM

• 39620

Mallory

• 9-62601
• 9-62601-25

Mercruiser Stern Drive

• 27-64818A2
• 27-64818A3
• 27-94996
• 27-949962
• 27-94996A1
• 27-94996A2
• 27-94996Q2

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2743	GLM 31141 Mallory 9-61012 Mercruiser Stern Drive 27-94996 27-949962 27-94996A20	1	Outdrive Mounting Gasket		N/A
18-2840	GLM 31160 Mercruiser Stern Drive 27-35982	1	Bell Housing Gasket		N/A
18-7117	GLM 82150 Johnson/Evinrude Outboard 303360 Mallory 9-76507 Mercruiser Stern Drive 25-35027 Mercury Marine 25-35027	1	O-Ring		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
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

Additional Details:

• Fits: MC-I drives (s/n 6225576 & Below) (1967-1982)

Interchanges/Replaces

GLM

• 39590

Mallory

• 9-62602
• 9-62602-25

Mercruiser Stern Drive

• 27-45821
• 27-64818
• 27-64818A1
• 27-64818A20
• 27-64818A4
• 27-64818Q4
• 27-64818T4

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2820	Mercruiser Stern Drive 27-45821 27-64818 27-64818A1 27-64818A20 27-64818A4 27-64818Q4	1	Outdrive Gasket		N/A
18-2840	GLM 31160 Mercruiser Stern Drive 27-35982	1	Bell Housing 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	2	O-Ring		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

Additional Details:

• Fits: IA/IB/IC & EZ Shift (1964-1966)

Interchanges/Replaces

Mallory

• 9-62603

Mercruiser Stern Drive

• 27-35996
• 27-35996A1

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2556	Mercruiser Stern Drive 27-35996 27-35996A1	1	Drive Shaft Housing to Bell Housing Gasket		N/A
18-2840	GLM 31160 Mercruiser Stern Drive 27-35982	1	Bell Housing 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	2	O-Ring
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

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-7457	Chrysler/Force/US Marine 25-F455305 GLM 81320 Johnson/Evinrude Outboard 319662	1	O-Ring		N/A
18-8351	GLM 87130 Johnson/Evinrude Outboard 0321504 308500	1	Oil Seal		N/A
18-2093	GLM 87120 Johnson/Evinrude Outboard 319664 333096 398051	1	Oil Seal		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
18-7174	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

Additional Details:

• Ratios: 1.50:1 (1.47:1)
• Teeth: 20-22
• For: Gen II applications s/n range up to 0K999999 only

Interchanges/Replaces

GLM

• 11216

Mercruiser Stern Drive

• 43-803102T1

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-1165	GLM 21510 Mallory 9-75117 Mercruiser Stern Drive 31-61100A1	1	Tapered Roller Bearing		N/A
18-2201	GLM 11210 Mercruiser Stern Drive 43-18410A2 43-18411A2 43-59832A2 43-59832A4	1	Upper Unit Gear Set		N/A
18-2820	Mercruiser Stern Drive 27-45821 27-64818 27-64818A1 27-64818A20 27-64818A4 27-64818Q4	1	Outdrive Gasket		N/A
18-2840	GLM 31160 Mercruiser Stern Drive 27-35982	1	Bell Housing Gasket		N/A
18-2743	GLM 31141 Mallory 9-61012 Mercruiser Stern Drive 27-94996 27-949962 27-94996A20	1	Outdrive Mounting Gasket		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
18-7117	GLM 82150 Johnson/Evinrude Outboard 303360 Mallory 9-76507 Mercruiser Stern Drive 25-35027 Mercury Marine 25-35027	1	O-Ring		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
18-2644	GLM 87501 Mallory 9-74302 Mercruiser Stern Drive 26-88397A1	1	Upper Unit Seal Kit		N/A
18-1160	GLM 21520 Mallory 9-75123 Mercruiser Stern Drive 31-35988A12 31-35988A2	1	Drive Bearing Kit		N/A
18-2292	GLM 23280 Mercruiser Stern Drive 15-35980A1	1	Shim Kit		N/A
18-2293	GLM 23270 Mercruiser Stern Drive 15-23097A1 15-36178A02 15-36178A1 15-39899A1	1	Shim Kit		N/A
18-2283	GLM 23260 Mercruiser Stern Drive 15-45691A1	1	Shim Set		N/A

Additional Details:

• Ratio: 1.84:1 & 1.81:1
• Teeth: 17-19
• For: Gen II applications s/n range up to 0K999999 only

Interchanges/Replaces

GLM

• 11236

Mercruiser Stern Drive

• 43-803120T1

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2283	GLM 23260 Mercruiser Stern Drive 15-45691A1	1	Shim Set		N/A
18-2292	GLM 23280 Mercruiser Stern Drive 15-35980A1	1	Shim Kit		N/A
18-2293	GLM 23270 Mercruiser Stern Drive 15-23097A1 15-36178A02 15-36178A1 15-39899A1	1	Shim Kit		N/A
18-1161	GLM 21540 Johnson/Evinrude Outboard 983891 Mallory 9-75122 Mercruiser Stern Drive 31-35990A1 OMC Stern Drive 983891	1	Tapered Roller Bearing		N/A
18-1165	GLM 21510 Mallory 9-75117 Mercruiser Stern Drive 31-61100A1	1	Tapered Roller Bearing		N/A
18-2644	GLM 87501 Mallory 9-74302 Mercruiser Stern Drive 26-88397A1	1	Upper Unit Seal Kit		N/A
18-1160	GLM 21520 Mallory 9-75123 Mercruiser Stern Drive 31-35988A12 31-35988A2	1	Drive Bearing Kit		N/A
18-2204	GLM 11230 Mercruiser Stern Drive 43-75324A2 43-75325A3	1	Upper Unit Gear Set		N/A
18-2820	Mercruiser Stern Drive 27-45821 27-64818 27-64818A1 27-64818A20 27-64818A4 27-64818Q4	1	Outdrive Gasket		N/A
18-2743	GLM 31141 Mallory 9-61012 Mercruiser Stern Drive 27-94996 27-949962 27-94996A20	1	Outdrive Mounting Gasket		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
18-7117	GLM 82150 Johnson/Evinrude Outboard 303360 Mallory 9-76507 Mercruiser Stern Drive 25-35027 Mercury Marine 25-35027	1	O-Ring		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

Interchanges/Replaces

GLM

• 21440

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-2149	GLM 21430 Mallory 9-72150 Mercruiser Stern Drive 20175 22879 29880 43433 Mercury Marine 20175 22879 29880 43433	1	Shift Cable Guide		N/A
18-2162	Mallory 9-72151 Mercruiser Stern Drive 33981 33981T 33981T1 8507521 8507522	1	Shift Slide & Screw		N/A
18-2163	GLM 21090 Mallory 9-72152 Mercruiser Stern Drive 10-31700	1	Shift Slide Screw		N/A
18-2248	Mercruiser Stern Drive 35187A1 35187A2 35187A4 49518A1 73723A01 73723A1	1	Shift Cable Assembly (No Support Tube)		N/A
18-2743	GLM 31141 Mallory 9-61012 Mercruiser Stern Drive 27-94996 27-949962 27-94996A20	1	Outdrive Mounting Gasket		N/A
18-2820	Mercruiser Stern Drive 27-45821 27-64818 27-64818A1 27-64818A20 27-64818A4 27-64818Q4	1	Outdrive Gasket		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
18-2840	GLM 31160 Mercruiser Stern Drive 27-35982	1	Bell Housing Gasket		N/A
18-7117	GLM 82150 Johnson/Evinrude Outboard 303360 Mallory 9-76507 Mercruiser Stern Drive 25-35027 Mercury Marine 25-35027	1	O-Ring		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
18-2753-2	GLM 89080 Mercruiser Stern Drive 31659 74639 74639A2	1	Shift Cable Bellows		N/A

Additional Details:

• For: Volvo 8.1 (All Models) 2000-Current

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