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Complete Lower Gearcase Rebuild Kit
Your Price:
$152.99

Complete Lower Gearcase Rebuild Kit

676-18-8370

Key Features:

  • Includes Water Pump and Complete Seal Kit

Additional Details:

  • For:: Mercruiser R/MR/Alpha I

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-2945Chrysler/Force/US Marine
  • 12-19183
  • F50556
  • F8077
  • F8186
Johnson/Evinrude Outboard
  • 307552
Mallory
  • 9-60101
  • 9-60102
Mercruiser Stern Drive
  • 12-19183
  • 12-191832
  • 12-191833
  • 12-19183B
  • 12-20260
  • 12-20260B
Mercury Marine
  • 12-19183
  • 12-191832
  • 12-191833
  • 12-20260
2Drain Screw Gasket N/A
18-2340GLM
  • 30010
Mercruiser Stern Drive
  • 12-31266
Mercury Marine
  • 12-31266
1Shift Shaft Washer N/A
18-2076Chrysler/Force/US Marine
  • 26-12224
  • 26-F697118
GLM
  • 85700
Mallory
  • 9-76101
Mercruiser Stern Drive
  • 26-12224
Mercury Marine
  • 26-12224
1Oil Seal N/A
18-7159GLM
  • 83440
Mallory
  • 9-76544
Mercruiser Stern Drive
  • 25-31534
  • 25-48451
Mercury Marine
  • 25-31534
1O-Ring N/A
18-2002Chrysler/Force/US Marine
  • 26-76868
GLM
  • 85130
Honda Outboard
  • 91252-ZW1-003
Johnson/Evinrude Outboard
  • 0320862
Mallory
  • 9-76202
Mercruiser Stern Drive
  • 26-30550
  • 26-76868
Mercury Marine
  • 26-30550
  • 26-70019
  • 26-73838
  • 26-76868
OMC Stern Drive
  • 320862
1Oil Seal N/A
18-3109GLM
  • 12820
Mallory
  • 9-43623
Mercruiser Stern Drive
  • 23-29804
  • 23-29804T
  • 23-52928
Mercury Marine
  • 23-29804
  • 23-29804T
1Water Tube Guide N/A
18-2154GLM
  • 21010
Mallory
  • 9-76133
Mercruiser Stern Drive
  • 23-30617A1
  • 23-30617A2
  • 23-8M0112749
Mercury Marine
  • 23-30617A1
1Shift Shaft Housing Bushing N/A
18-3116GLM
  • 12410
Mallory
  • 9-43211
Mercruiser Stern Drive
  • 46-48743A1
  • 46-64141A1
  • 46-96148A1
  • 46-96148T1
Mercury Marine
  • 46-48743A1
  • 46-64141A1
  • 46-96148
  • 46-96148A1
  • 46-96148T1
1Water Pump Housing N/A
18-3017Chrysler/Force/US Marine
  • 47-803631T
  • 47-F694065
GLM
  • 89840
Mallory
  • 9-45306
Mercruiser Stern Drive
  • 47-30221
  • 47-65960
  • 47-89984
  • 47-89984T4
Mercury Marine
  • 47-30221
  • 47-65960
  • 47-85460
  • 47-89984
  • 47-899842
  • 47-899844
  • 47-89984T3
  • 47-89984T4
1Impeller N/A
18-2914GLM
  • 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
1Water Pump Gasket N/A
18-7158GLM
  • 81160
Johnson/Evinrude Outboard
  • 309731
  • 310585
Mallory
  • 9-76543
Mercruiser Stern Drive
  • 25-30613
  • 25-846357
Mercury Marine
  • 25-30613
  • 25-846357
OMC Stern Drive
  • 310585
  • 310967
1O-Ring N/A
18-7176Chrysler/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
1O-Ring N/A
18-2944GLM
  • 85140
Mallory
  • 9-76512
Mercruiser Stern Drive
  • 26-45577
  • 26-455771
  • 26-45577B
  • 26-45577B1
1Seal Ring Gasket N/A
18-7173Chrysler/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
1O-Ring N/A
18-2826GLM
  • 31040
Mallory
  • 9-60036
Mercruiser Stern Drive
  • 27-33146
  • 27-856704
Mercury Marine
  • 27-33146
  • 27-85610
  • 27-856101
1Water Pump Base Gasket N/A
18-2915GLM
  • 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
1Water Pump Gasket N/A
18-3117GLM
  • 12510
Mallory
  • 9-43400
Mercruiser Stern Drive
  • 32435
Mercury Marine
  • 30605
  • 32435
  • 324351
  • 32435B
1Impeller Plate N/A
18-7162Chrysler/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
1O-Ring N/A
18-2919GLM
  • 31050
Mallory
  • 9-60031
Mercruiser Stern Drive
  • 27-426311
Mercury Marine
  • 27-42631
  • 27-426311
1Water Pump Gasket N/A
18-2801GLM
  • 31030
Mallory
  • 9-60028
Mercruiser Stern Drive
  • 27-32438
Mercury Marine
  • 27-32438
1Water Pump Gasket N/A
18-7426GLM
  • 21330
Mallory
  • 9-76562
Mercruiser Stern Drive
  • 25-30271
Mercury Marine
  • 25-30271
Mercury Sport Jet
  • 25-30271
1O-Ring N/A
18-2013GLM
  • 85040
Mallory
  • 9-76108
Mercruiser Stern Drive
  • 26-16977
  • 26-31507
  • 26-79884
  • 802276
Mercury Marine
  • 26-16977
  • 26-20465
  • 26-31507
  • 26-79884
  • 802276
1Oil Seal N/A
18-2014Chrysler/Force/US Marine
  • 26-F694305
GLM
  • 85070
Mallory
  • 9-76109
Mercruiser Stern Drive
  • 26-33144
  • 26-77634
  • 26-89238
Mercury Marine
  • 26-33144< li>
  • 26-77634
  • 26-89238
1Oil Seal N/A
18-2009GLM
  • 85050
Mallory
  • 9-76105
Mercruiser Stern Drive
  • 26-31249
  • 26-46021
  • 26-89236
  • 26-892361
Mercury Marine
  • 26-25776
  • 26-31249
  • 26-89236
1Oil Seal N/A
18-7153GLM
  • 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
1O-Ring N/A
Gear Repair Kit
Your Price:
$406.99

Gear Repair Kit

676-18-2404

Additional Details:

  • For: "R" drive

Interchanges/Replaces

GLM

  • 25115

Mercruiser Stern Drive

  • 43-803079T1

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-1155GLM
  • 21620
Mallory
  • 9-75114
Mercruiser Stern Drive
  • 30-17927
  • 30-35914
  • 30-88957
  • 30-88957A1
  • 30-88957T
Mercury Marine
  • 30-17927
  • 30-35914
  • 30-88957
  • 30-88957A1
  • 30-88957T
Mercury Race Outboard
  • 30-35914
  • 30-88957
  • 30-88957A1
  • 30-88957T
1Ball Bearing N/A
18-1157Chrysler/Force/US Marine
  • 31-30895
GLM
  • 11420
Honda Outboard
  • 91057-ZW1-003
Mallory
  • 9-75111
Mercruiser Stern Drive
  • 31-30895
  • 31-30895T
Mercury Marine
  • 31-30895
  • 31-30895T
1Foward Gear Inner Bearing N/A
18-1159GLM
  • 21590
Mallory
  • 9-75120
Mercruiser Stern Drive
  • 31-35928A1
  • 31-35928T1
Mercury Marine
  • 31-35928A1
1Tapered Roller Bearing N/A
18-2200GLM
  • 11300
Mercruiser Stern Drive
  • 43-61027
  • 43-96084A4
1Gear Set N/A
18-2202GLM
  • 11060
Mallory
  • 9-73474
Mercruiser Stern Drive
  • 52-66063
  • 52-824112
  • 52-853594
  • 52-853594T
Mercury Marine
  • 52-824112
1Sliding Clutch N/A
18-2285GLM
  • 23220
Mercruiser Stern Drive
  • 15-35931A1
  • 15-47397A1
Mercury Marine
  • 15-47397A1
1Shim Set N/A
18-2299GLM
  • 11380
Mallory
  • 9-72641
Mercruiser Stern Drive
  • 14-52833
  • 14-79447
Mercury Marine
  • 14-79447
1Tab Washer N/A
18-3719Chrysler/Force/US Marine
  • 11-35921
  • 11-826375
  • 11-F694188
GLM
  • 11190
Johnson/Evinrude Outboard
  • 314730
Mallory
  • 9-78103
Mercruiser Stern Drive
  • 11-35921
Mercury Marine
  • 11-35921
  • 11-47411
  • 11-826375
OMC Stern Drive
  • 314730
1Pinion Nut N/A
NSSMercruiser Stern Drive
  • 31-53079A1
1Tapered Roller Bearing AssemblyNo ImageN/A
Gear Repair Kit
Your Price:
$758.99

Gear Repair Kit

676-18-2405

Additional Details:

  • For: MR/Alpha I

Interchanges/Replaces

GLM

  • 25125

Mallory

  • 9-79200

Mercruiser Stern Drive

  • 43-803091T1

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-1117Chrysler/Force/US Marine
  • 31-42647A1
  • 31-F694057
GLM
  • 21610
Johnson/Evinrude Outboard
  • 387817
  • 5007751
Mallory
  • 9-75121
Mercruiser Stern Drive
  • 31-42647
  • 31-42647A1
Mercury Marine
  • 31-42647A1
OMC Stern Drive
  • 387817
1Pinion Bearing N/A
18-1143GLM
  • 21580
Mallory
  • 9-75107
Mercruiser Stern Drive
  • 31-36387A1
Mercury Marine
  • 31-36387A1
1Tapered Roller Bearing N/A
18-1155GLM
  • 21620
Mallory
  • 9-75114
Mercruiser Stern Drive
  • 30-17927
  • 30-35914
  • 30-88957
  • 30-88957A1
  • 30-88957T
Mercury Marine
  • 30-17927
  • 30-35914
  • 30-88957
  • 30-88957A1
  • 30-88957T
Mercury Race Outboard
  • 30-35914
  • 30-88957
  • 30-88957A1
  • 30-88957T
1Ball Bearing N/A
18-1158Chrysler/Force/US Marine
  • 31-30956
  • 31-F523058
GLM
  • 11410
Honda Outboard
  • 91053-ZW1-003
Johnson/Evinrude Outboard
  • 387247
Mallory
  • 9-75112
Mercruiser Stern Drive
  • 31-30956
  • 31-30956T
Mercury Marine
  • 31-30956
  • 31-30956T
OMC Stern Drive
  • 387247
1Carrier Bearing N/A
18-2202GLM
  • 11060
Mallory
  • 9-73474
Mercruiser Stern Drive
  • 52-66063
  • 52-824112
  • 52-853594
  • 52-853594T
Mercury Marine
  • 52-824112
1Sliding Clutch N/A
18-2285GLM
  • 23220
Mercruiser Stern Drive
  • 15-35931A1
  • 15-47397A1
Mercury Marine
  • 15-47397A1
1Shim Set N/A
18-2294GLM
  • 23210
Mercruiser Stern Drive
  • 15-42637A1
Mercury Marine
  • 15-42637A1
  • 15-8M0063267
1Shim Kit N/A
18-2298GLM
  • 11381
Mallory
  • 9-72640
  • 9-72643
Mercruiser Stern Drive
  • 14-17460
  • 14-18323
Mercury Marine
  • 14-17460
  • 14-18323
1Tab Washer N/A
18-2299GLM
  • 11380
Mallory
  • 9-72641
Mercruiser Stern Drive
  • 14-52833
  • 14-79447
Mercury Marine
  • 14-79447
1Tab Washer N/A
18-2343Chrysler/Force/US Marine
  • 12-92721
  • 12-F694186
GLM
  • 32800
Mallory
  • 9-78108
Mercruiser Stern Drive
  • 12-92721
Mercury Marine
  • 12-92721
1Pinion Nut Washer N/A
18-2652GLM
  • 87510
Mallory
  • 9-74304
Mercruiser Stern Drive
  • 26-33144A1
  • 26-33144A2
  • 26-89238A1
1Lower Unit Seal Kit N/A
18-3719Chrysler/Force/US Marine
  • 11-35921
  • 11-826375
  • 11-F694188
GLM
  • 11190
Johnson/Evinrude Outboard
  • 314730
Mallory
  • 9-78103
Mercruiser Stern Drive
  • 11-35921
Mercury Marine
  • 11-35921
  • 11-47411
  • 11-826375
OMC Stern Drive
  • 314730
1Pinion Nut N/A
18-2206-11Gear Set N/A
Gear Set
Your Price:
$454.99

Gear Set

676-18-2310

Key Features:

  • Includes Forward & Pinion Gears

Interchanges/Replaces

GLM

  • 22661

Johnson/Evinrude Outboard

  • 397627

Mallory

  • 9-73511
Gear Set
Your Price:
$352.99

Gear Set

676-18-2200

Additional Details:

  • For: 888 s/n 3106717 & Up
  • For: #1 Units s/n 3469428 & Up except MR/Alpha unit (which have no pre-load pin top drive shaft)

Interchanges/Replaces

GLM

  • 11300

Mercruiser Stern Drive

  • 43-61027
  • 43-96084A4

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-1150GLM
  • 21600
Mercruiser Stern Drive
  • 31-92366
  • 31-92366A1
1Needle Roller Bearing N/A
18-1157Chrysler/Force/US Marine
  • 31-30895
GLM
  • 11420
Honda Outboard
  • 91057-ZW1-003
Mallory
  • 9-75111
Mercruiser Stern Drive
  • 31-30895
  • 31-30895T
Mercury Marine
  • 31-30895
  • 31-30895T
1Foward Gear Inner Bearing N/A
18-2409GLM
  • 11020
Mercruiser Stern Drive
  • 43-92320
  • 43-92320T
1Reverse Gear N/A
18-2410GLM
  • 11100
Mercruiser Stern Drive
  • 43-96084A5
  • 43-96084A7
1Forward Gear Set N/A
Gear Set
Your Price:
$687.99

Gear Set

676-18-2201

Additional Details:

  • Drive Gear: 22 Teeth
  • Driven Gear: 20 Teeth
  • Ratio: 1.5:1
  • For: most V-8 drives & Gen II (s/n 0K999999 & Below)

Interchanges/Replaces

GLM

  • 11210

Mercruiser Stern Drive

  • 43-18410A2
  • 43-18411A2
  • 43-59832A2
  • 43-59832A4

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-1142GLM
  • 21560
Mercruiser Stern Drive
  • 31-32573A1
1Upper Pinion Bearing N/A
Gear Set
Your Price:
$585.99

Gear Set

676-18-2204

Additional Details:

  • Drive Gear: 17 Teeth
  • Driven Gear: 19 Teeth
  • Ratio: 1.84:1
  • For: V-6 & 470/485 (4 cyl. etc.) and Gen II (s/n 0K999999 & Below)

Interchanges/Replaces

GLM

  • 11230

Mercruiser Stern Drive

  • 43-75324A2
  • 43-75325A3
Gear Set
Your Price:
$634.99

Gear Set

676-18-2407

Additional Details:

  • For: MR/Alpha One/Gen II Lower Gear Housings

Interchanges/Replaces

GLM

  • 11312

Mercruiser Stern Drive

  • 43-17064A3
  • 43-42933A2
  • 43-42933A3
  • 43-878087A4

Mercury Marine

  • 43-828072A2

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-1117Chrysler/Force/US Marine
  • 31-42647A1
  • 31-F694057
GLM
  • 21610
Johnson/Evinrude Outboard
  • 387817
  • 5007751
Mallory
  • 9-75121
Mercruiser Stern Drive
  • 31-42647
  • 31-42647A1
Mercury Marine
  • 31-42647A1
OMC Stern Drive
  • 387817
1Pinion Bearing N/A
18-1143GLM
  • 21580
Mallory
  • 9-75107
Mercruiser Stern Drive
  • 31-36387A1
Mercury Marine
  • 31-36387A1
1Tapered Roller Bearing N/A
18-1155GLM
  • 21620
Mallory
  • 9-75114
Mercruiser Stern Drive
  • 30-17927
  • 30-35914
  • 30-88957
  • 30-88957A1
  • 30-88957T
Mercury Marine
  • 30-17927
  • 30-35914
  • 30-88957
  • 30-88957A1
  • 30-88957T
Mercury Race Outboard
  • 30-35914
  • 30-88957
  • 30-88957A1
  • 30-88957T
1Ball Bearing N/A
18-1158Chrysler/Force/US Marine
  • 31-30956
  • 31-F523058
GLM
  • 11410
Honda Outboard
  • 91053-ZW1-003
Johnson/Evinrude Outboard
  • 387247
Mallory
  • 9-75112
Mercruiser Stern Drive
  • 31-30956
  • 31-30956T
Mercury Marine
  • 31-30956
  • 31-30956T
OMC Stern Drive
  • 387247
1Carrier Bearing N/A
18-2285GLM
  • 23220
Mercruiser Stern Drive
  • 15-35931A1
  • 15-47397A1
Mercury Marine
  • 15-47397A1
1Shim Set N/A
18-2294GLM
  • 23210
Mercruiser Stern Drive
  • 15-42637A1
Mercury Marine
  • 15-42637A1
  • 15-8M0063267
1Shim Kit N/A
18-2343Chrysler/Force/US Marine
  • 12-92721
  • 12-F694186
GLM
  • 32800
Mallory
  • 9-78108
Mercruiser Stern Drive
  • 12-92721
Mercury Marine
  • 12-92721
1Pinion Nut Washer N/A
18-3719Chrysler/Force/US Marine
  • 11-35921
  • 11-826375
  • 11-F694188
GLM
  • 11190
Johnson/Evinrude Outboard
  • 314730
Mallory
  • 9-78103
Mercruiser Stern Drive
  • 11-35921
Mercury Marine
  • 11-35921
  • 11-47411
  • 11-826375
OMC Stern Drive
  • 314730
1Pinion Nut N/A
18-2206-11Gear Set N/A
Gear Set
Your Price:
$397.99

Gear Set

676-18-2410

Additional Details:

  • Fits: R drive

Interchanges/Replaces

GLM

  • 11100

Mercruiser Stern Drive

  • 43-96084A5
  • 43-96084A7
Lower Gear Housing
Your Price:
$621.99

Lower Gear Housing

676-18-2402

Additional Details:

  • For: R Style

Interchanges/Replaces

GLM

  • 17000

Mercruiser Stern Drive

  • 1623-3489A1
  • 1623-3646A1
  • 1623-3646A4
  • 1623-4110A3
  • 1623-5356A4
Lower Gear Housing
Your Price:
$1,045.99

Lower Gear Housing

676-18-2401

Key Features:

  • Includes tapered roller bearing for non-tractor 14/28 or 17/28 gears

Additional Details:

  • Bore Size: 3.2635-3.2650
  • For: MR/Alpha style

Interchanges/Replaces

GLM

  • 18000

Mallory

  • 9-79127

Mercruiser Stern Drive

  • 1623-8951A15
  • 1623-8951A27
  • 1623-8951A37
  • 1623-8951A5

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-2244Chrysler/Force/US Marine
  • 10-79953
  • 10-79953A2
  • 10-F50109
  • F40109
GLM
  • 22420
Mallory
  • 9-72650
Mercruiser Stern Drive
  • 10-28634
  • 10-28634A1
  • 10-79953
  • 10-79953A2
  • 10-79953Q04
  • 10-79953Q2
  • 816610A1
  • 816610A2
Mercury Marine
  • 10-20259
  • 10-28634
  • 10-28634A1
  • 10-79953
  • 10-79953A2
  • 10-79953Q04
  • 10-79953Q2
1Drain Screw N/A
18-7176Chrysler/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
1O-Ring N/A
18-6093GLM
  • 12702
Mercruiser Stern Drive
  • 806105A1
  • 97-806105
  • 97-806105Q1
  • 97-806105T1
1Anode N/A
18-2914GLM
  • 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
1Water Pump Gasket N/A
18-1143GLM
  • 21580
Mallory
  • 9-75107
Mercruiser Stern Drive
  • 31-36387A1
Mercury Marine
  • 31-36387A1
1Tapered Roller Bearing N/A
18-2376Mallory
  • 9-72602
Mercruiser Stern Drive
  • 73020A20
  • 818763A10
  • 818763A4
1Carrier Bearing N/A
18-2285GLM
  • 23220
Mercruiser Stern Drive
  • 15-35931A1
  • 15-47397A1
Mercury Marine
  • 15-47397A1
1Shim Set N/A
18-7159GLM
  • 83440
Mallory
  • 9-76544
Mercruiser Stern Drive
  • 25-31534
  • 25-48451
Mercury Marine
  • 25-31534
1O-Ring N/A
18-1117Chrysler/Force/US Marine
  • 31-42647A1
  • 31-F694057
GLM
  • 21610
Johnson/Evinrude Outboard
  • 387817
  • 5007751
Mallory
  • 9-75121
Mercruiser Stern Drive
  • 31-42647
  • 31-42647A1
Mercury Marine
  • 31-42647A1
OMC Stern Drive
  • 387817
1Pinion Bearing N/A
18-3199GLM
  • 21870
Mallory
  • 9-78115
Mercruiser Stern Drive
  • 93423
  • 934231
  • 934233
1Water Pickup N/A
18-3198GLM
  • 21880
Mallory
  • 9-78114
Mercruiser Stern Drive
  • 93424
  • 934241
  • 934243
1Water Pickup N/A
18-3197GLM
  • 12822
Mallory
  • 9-78130
Mercruiser Stern Drive
  • 10-67373
  • 10-76156
Mercury Marine
  • 10-76156
1Water Pick-Up Insert Screw N/A
18-2915GLM
  • 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
1Water Pump Gasket N/A
18-2919GLM
  • 31050
Mallory
  • 9-60031
Mercruiser Stern Drive
  • 27-426311
Mercury Marine
  • 27-42631
  • 27-426311
1Water Pump Gasket N/A
18-6011Honda Outboard
  • 41107-ZW1-003ZA
Mercruiser Stern Drive
  • 31640
  • 316404
  • 31640A1
  • 97-31640Q4
Mercury Marine
  • 31640
  • 316403
  • 316404
  • 31640A1
  • 31640A2
  • 31640A4
  • 31640B4
  • 72436A1
  • 97-31640Q4
1Anode N/A
18-2945Chrysler/Force/US Marine
  • 12-19183
  • F50556
  • F8077
  • F8186
Johnson/Evinrude Outboard
  • 307552
Mallory
  • 9-60101
  • 9-60102
Mercruiser Stern Drive
  • 12-19183
  • 12-191832
  • 12-191833
  • 12-19183B
  • 12-20260
  • 12-20260B
Mercury Marine
  • 12-19183
  • 12-191832
  • 12-191833
  • 12-20260
1Drain Screw Gasket N/A
18-6245GLM
  • 21740
Mercruiser Stern Drive
  • 10-32470
Mercury Marine
  • 10-32470
  • 10-47580
  • 10-74728
1Anode Mounting Bolt N/A
NSSMercruiser Stern Drive
  • 10-806290
2Screw (#10-32 x 5/8")No ImageN/A
NSSMercruiser Stern Drive
  • 11-45812
  • 11-859124
1LocknutNo ImageN/A
Overhaul Kit
Your Price:
$389.99

Overhaul Kit

676-18-2591

Key Features:

  • Service kit for Borg-Warner Velvet Drive 71 and 72 series transmission

Additional Details:

  • Includes: Gaskets, Seals. Sealing Rings, Bronze and Steel Plates
Pinion & Foward Gear Set
Your Price:
$620.99

Pinion & Foward Gear Set

676-18-2360

Key Features:

  • Standard rotation (RH)

Additional Details:

  • Teeth: 13-21
  • Fits: Alpha One Gen II (except 2.00 & 2.40 ratio) (s/n 0F680000 & Up)

Interchanges/Replaces

Mercruiser Stern Drive

  • 43-828072A3
  • 43-878087A2
Reverse Gear
Your Price:
$87.99

Reverse Gear

676-18-2208

Interchanges/Replaces

GLM

  • 22672

Johnson/Evinrude Outboard

  • 318304

Mallory

  • 9-73502
Reverse Gear
Your Price:
$130.99

Reverse Gear

676-18-2309

Interchanges/Replaces

GLM

  • 22662

Johnson/Evinrude Outboard

  • 332489

Mallory

  • 9-73512
Reverse Gear
Your Price:
$190.99

Reverse Gear

676-18-2219

Interchanges/Replaces

Johnson/Evinrude Outboard

  • 317838
  • 333077
  • 340490
  • 345992

OMC Stern Drive

  • 317838
  • 333077
Reverse Gear
Your Price:
$195.99

Reverse Gear

676-18-2408

Additional Details:

  • For: Alpha One/Gen II lower (s/n 0D469859 & Up)

Interchanges/Replaces

GLM

  • 11013

Mercruiser Stern Drive

  • 43-828073A1
Reverse Gear
Your Price:
$262.99

Reverse Gear

676-18-2409

Additional Details:

  • For: "R" drive (28 teeth)

Interchanges/Replaces

GLM

  • 11020

Mercruiser Stern Drive

  • 43-92320
  • 43-92320T
Upper Gear Kit
Your Price:
$503.99

Upper Gear Kit

676-18-2257

Additional Details:

  • Ratio: 1.65:1
  • Drive Gear: 24 teeth
  • Driven Gear: 24 teeth
  • For: 6 cyl Inline

Interchanges/Replaces

GLM

  • 11225

Mercruiser Stern Drive

  • 43-803112T1

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-1160GLM
  • 21520
Mallory
  • 9-75123
Mercruiser Stern Drive
  • 31-35988A12
  • 31-35988A2
1Drive Bearing Kit N/A
18-1161GLM
  • 21540
Johnson/Evinrude Outboard
  • 983891
Mallory
  • 9-75122
Mercruiser Stern Drive
  • 31-35990A1
OMC Stern Drive
  • 983891
1Tapered Roller Bearing N/A
18-1165GLM
  • 21510
Mallory
  • 9-75117
Mercruiser Stern Drive
  • 31-61100A1
1Tapered Roller Bearing N/A
18-2203GLM
  • 11220
Mercruiser Stern Drive
  • 43-45814A5
  • 43-55765A2
  • 43-55765A3
1Upper Unit Gear Set N/A
18-2619-1GLM
  • 39620
Mallory
  • 9-62601
  • 9-62601-25
Mercruiser Stern Drive
  • 27-64818A2
  • 27-64818A3
  • 27-94996
  • 27-949962
  • 27-94996A1
  • 27-94996A2
  • 27-94996Q2
1Outdrive Gasket Set N/A
18-2648GLM
  • 87500
Mallory
  • 9-74303
Mercruiser Stern Drive
  • 26-32511A1
  • 26-32511B1
1Upper Unit Seal Kit N/A
18-2820Mercruiser Stern Drive
  • 27-45821
  • 27-64818
  • 27-64818A1
  • 27-64818A20
  • 27-64818A4
  • 27-64818Q4
1Outdrive Gasket N/A
Upper Gear Kit
Your Price:
$1,174.99

Upper Gear Kit

676-18-1600

Additional Details:

  • Upper Gear Kit Ratio: 21:16

Interchanges/Replaces

GLM

  • 22520

OMC Stern Drive

  • 983825

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-1170Chrysler/Force/US Marine
  • 31-812767A1
GLM
  • 21541
Johnson/Evinrude Outboard
  • 983892
Mercruiser Stern Drive
  • 31-812767A1
Mercury Marine
  • 31-812767A1
  • 31-8M0103476
  • 31-F506225
  • FA506225
OMC Stern Drive
  • 983892
1Lower Pinion Bearing N/A
18-1171GLM
  • 21543
OMC Stern Drive
  • 983878
1U-Joint Shaft Bearing N/A
18-1172GLM
  • 21542
OMC Stern Drive
  • 983877
1Carrier Bearing N/A
18-1161GLM
  • 21540
Johnson/Evinrude Outboard
  • 983891
Mallory
  • 9-75122
Mercruiser Stern Drive
  • 31-35990A1
OMC Stern Drive
  • 983891
1Tapered Roller Bearing N/A