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Sierra / Mallory

Upper Unit Assembly
Your Price:
$1,812.99

Upper Unit Assembly

676-18-2451

Additional Details:

  • For: Alpha I
  • Ratios: 1.65:1, 1.62:1

Interchanges/Replaces

GLM

  • 19200

Mercruiser Stern Drive

  • 1547-3917A16
  • 1547-3917A30
  • 1547-3917A38
  • 1547-3917A4
  • 1547-3917A8
  • 1547-5523A11
  • 1547-5523A66
  • 1547-5523A8
  • 1547-8265A16
  • 1547-9412A21
Upper Unit Assembly
Your Price:
$1,812.99

Upper Unit Assembly

676-18-2452

Additional Details:

  • For: Alpha I
  • Ratios: 1.84:1, 1.81:1

Interchanges/Replaces

GLM

  • 19300

Mercruiser Stern Drive

  • 1547-5523A49
  • 1547-5523A67
  • 1547-8265A17
  • 1547-9412A22
  • 1547-9412A36
Upper Unit Assembly
Your Price:
$1,812.99

Upper Unit Assembly

676-18-2453

Additional Details:

  • For: Alpha I
  • Ratios: 1.98:1, 1.94:1

Interchanges/Replaces

GLM

  • 19400

Mercruiser Stern Drive

  • 1547-3917A17
  • 1547-3917A2
  • 1547-3917A28
  • 1547-3917A39
  • 1547-3917A9
  • 1547-5523A10
  • 1547-5523A65
  • 1547-5523A7
  • 1547-8265A18
  • 1547-9412A23
  • 1547-9412A37
Upper Unit Gear Repair Kit
Your Price:
$593.99

Upper Unit Gear Repair Kit

676-18-2358

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
18-1165GLM
  • 21510
Mallory
  • 9-75117
Mercruiser Stern Drive
  • 31-61100A1
1Tapered Roller Bearing N/A
18-2201GLM
  • 11210
Mercruiser Stern Drive
  • 43-18410A2
  • 43-18411A2
  • 43-59832A2
  • 43-59832A4
1Upper Unit Gear Set N/A
18-2820Mercruiser Stern Drive
  • 27-45821
  • 27-64818
  • 27-64818A1
  • 27-64818A20
  • 27-64818A4
  • 27-64818Q4
1Outdrive Gasket N/A
18-2840GLM
  • 31160
Mercruiser Stern Drive
  • 27-35982
1Bell Housing Gasket N/A
18-2743GLM
  • 31141
Mallory
  • 9-61012
Mercruiser Stern Drive
  • 27-94996
  • 27-949962
  • 27-94996A20
1Outdrive Mounting Gasket N/A
18-7170Chrysler/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
1O-Ring N/A
18-7117GLM
  • 82150
Johnson/Evinrude Outboard
  • 303360
Mallory
  • 9-76507
Mercruiser Stern Drive
  • 25-35027
Mercury Marine
  • 25-35027
1O-Ring 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
2O-Ring
18-2644GLM
  • 87501
Mallory
  • 9-74302
Mercruiser Stern Drive
  • 26-88397A1
1Upper Unit Seal Kit N/A
18-1160GLM
  • 21520
Mallory
  • 9-75123
Mercruiser Stern Drive
  • 31-35988A12
  • 31-35988A2
1Drive Bearing Kit N/A
18-2292GLM
  • 23280
Mercruiser Stern Drive
  • 15-35980A1
1Shim Kit N/A
18-2293GLM
  • 23270
Mercruiser Stern Drive
  • 15-23097A1
  • 15-36178A02
  • 15-36178A1
  • 15-39899A1
1Shim Kit N/A
18-2283GLM
  • 23260
Mercruiser Stern Drive
  • 15-45691A1
1Shim Set N/A
Upper Unit Gear Repair Kit
Your Price:
$493.99

Upper Unit Gear Repair Kit

676-18-2365

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
18-2283GLM
  • 23260
Mercruiser Stern Drive
  • 15-45691A1
1Shim Set N/A
18-2292GLM
  • 23280
Mercruiser Stern Drive
  • 15-35980A1
1Shim Kit N/A
18-2293GLM
  • 23270
Mercruiser Stern Drive
  • 15-23097A1
  • 15-36178A02
  • 15-36178A1
  • 15-39899A1
1Shim 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
18-2644GLM
  • 87501
Mallory
  • 9-74302
Mercruiser Stern Drive
  • 26-88397A1
1Upper Unit Seal Kit N/A
18-1160GLM
  • 21520
Mallory
  • 9-75123
Mercruiser Stern Drive
  • 31-35988A12
  • 31-35988A2
1Drive Bearing Kit N/A
18-2204GLM
  • 11230
Mercruiser Stern Drive
  • 43-75324A2
  • 43-75325A3
1Upper Unit Gear Set N/A
18-2820Mercruiser Stern Drive
  • 27-45821
  • 27-64818
  • 27-64818A1
  • 27-64818A20
  • 27-64818A4
  • 27-64818Q4
1Outdrive Gasket N/A
18-2743GLM
  • 31141
Mallory
  • 9-61012
Mercruiser Stern Drive
  • 27-94996
  • 27-949962
  • 27-94996A20
1Outdrive Mounting Gasket N/A
18-7170Chrysler/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
1O-Ring N/A
18-7117GLM
  • 82150
Johnson/Evinrude Outboard
  • 303360
Mallory
  • 9-76507
Mercruiser Stern Drive
  • 25-35027
Mercury Marine
  • 25-35027
1O-Ring 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
2O-Ring
Upper Unit Gear Repair Kit
Your Price:
$462.99

Upper Unit Gear Repair Kit

676-18-6351K

Additional Details:

  • Ratio: 1.47:1
  • For: Gen II (1998 & Up) (s/n 0L100040 & Up)

Interchanges/Replaces

Mercruiser Stern Drive

  • 43-803103T1

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-6351Mercruiser Stern Drive
  • 43-853641A2
1Upper Unit Gear Set N/A
18-1179GLM
  • 21511
Mallory
  • 9-75106
Mercruiser Stern Drive
  • 31-32575A1
  • 31-32575T1
Mercury Marine
  • 31-32575A1
  • 31-32575T1
1Tapered Roller Bearing N/A
18-1156Chrysler/Force/US Marine
  • 31-30894A1
GLM
  • 21820
Honda Outboard
  • 91051-ZW1-003
Mallory
  • 9-75118
Mercruiser Stern Drive
  • 31-30894A1
Mercury Marine
  • 31-30894A1
1Foward Gear Bearing N/A
18-3712GLM
  • 28330
Mallory
  • 9-78107
Mercruiser Stern Drive
  • 12-45810
1Carrier Nut Washer N/A
18-3713Chrysler/Force/US Marine
  • 11-F1920
  • F1348
  • F1881
GLM
  • 28360
Mallory
  • 9-78117
Mercruiser Stern Drive
  • 11-22339
  • 11-36084
  • 11-97522
Mercury Marine
  • 11-22339
1Lock Nut N/A
18-2644GLM
  • 87501
Mallory
  • 9-74302
Mercruiser Stern Drive
  • 26-88397A1
1Upper Unit Seal Kit 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
18-2282GLM
  • 23261
Mercruiser Stern Drive
  • 15-32563A1
Mercury Marine
  • 15-32563A1
1Shim Set N/A
18-2292GLM
  • 23280
Mercruiser Stern Drive
  • 15-35980A1
1Shim Kit N/A
18-2293GLM
  • 23270
Mercruiser Stern Drive
  • 15-23097A1
  • 15-36178A02
  • 15-36178A1
  • 15-39899A1
1Shim Kit N/A
NSSMercruiser Stern Drive
  • 25-853649
1Spacer, Bearing CupNo ImageN/A
Upper Unit Gear Repair Kit
Your Price:
$478.99

Upper Unit Gear Repair Kit

676-18-6352K

Additional Details:

  • Ratios: 1.94:1 & 2.40:1
  • For: Gen II (1998 & Up) (s/n 0L100040 & Up)

Interchanges/Replaces

Mercruiser Stern Drive

  • 43-803106T1

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-6352Mercruiser Stern Drive
  • 43-853642A2
1Upper Unit Gear Set N/A
18-1179GLM
  • 21511
Mallory
  • 9-75106
Mercruiser Stern Drive
  • 31-32575A1
  • 31-32575T1
Mercury Marine
  • 31-32575A1
  • 31-32575T1
1Tapered Roller Bearing N/A
18-1156Chrysler/Force/US Marine
  • 31-30894A1
GLM
  • 21820
Honda Outboard
  • 91051-ZW1-003
Mallory
  • 9-75118
Mercruiser Stern Drive
  • 31-30894A1
Mercury Marine
  • 31-30894A1
1Foward Gear 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
18-3712GLM
  • 28330
Mallory
  • 9-78107
Mercruiser Stern Drive
  • 12-45810
1Carrier Nut Washer N/A
18-3713Chrysler/Force/US Marine
  • 11-F1920
  • F1348
  • F1881
GLM
  • 28360
Mallory
  • 9-78117
Mercruiser Stern Drive
  • 11-22339
  • 11-36084
  • 11-97522
Mercury Marine
  • 11-22339
1Lock Nut N/A
18-2644GLM
  • 87501
Mallory
  • 9-74302
Mercruiser Stern Drive
  • 26-88397A1
1Upper Unit Seal Kit 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
18-2282GLM
  • 23261
Mercruiser Stern Drive
  • 15-32563A1
Mercury Marine
  • 15-32563A1
1Shim Set N/A
18-2292GLM
  • 23280
Mercruiser Stern Drive
  • 15-35980A1
1Shim Kit N/A
18-2293GLM
  • 23270
Mercruiser Stern Drive
  • 15-23097A1
  • 15-36178A02
  • 15-36178A1
  • 15-39899A1
1Shim Kit N/A
NSSMercruiser Stern Drive
  • 25-853649
1Spacer, Bearing CupNo ImageN/A
Upper Unit Seal Kit
Your Price:
$67.99

Upper Unit Seal Kit

676-18-2586

Additional Details:

  • Fits: Volvo SX Thru 2006

Interchanges/Replaces

OMC Stern Drive

  • 3850594

Volvo Penta

  • 3850594

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
NSSVolvo Penta
  • 3852052
1Split PinNo ImageN/A
NSSVolvo Penta
  • 3852317
1GasketNo ImageN/A
NSSVolvo Penta
  • 967344
1O-RingNo ImageN/A
NSSVolvo Penta
  • 3852279
1GasketNo ImageN/A
NSSVolvo Penta
  • 3852272
1SealNo ImageN/A
18-0175GLM
  • 81080
Mercruiser Stern Drive
  • 25-26543
Mercury Marine
  • 25-26543
1O-Ring N/A
18-7116Chrysler/Force/US Marine
  • 25-62704
  • 25-F24342
GLM
  • 81100
Johnson/Evinrude Outboard
  • 303067
Mallory
  • 9-43631
Mercruiser Stern Drive
  • 25-62704
  • 802206
Mercury Marine
  • 25-20633
  • 25-22174
  • 25-62704
  • 25-85148
  • 802206
OMC Stern Drive
  • 303067
  • 3852045
Volvo Penta
  • 3852045
1O-Ring N/A
18-7183GLM
  • 45080
Mallory
  • 9-76557
OMC Stern Drive
  • 3852320
  • 925093
Volvo Penta
  • 3852320
  • 925093
  • 975676
1O-Ring 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
18-32882OMC Stern Drive
  • 3852315
Volvo Penta
  • 3852315
1Seal N/A
18-25251OMC Stern Drive
  • 3852322
  • 853858
  • 853868
Volvo Penta
  • 853868
1Sealing Ring N/A
18-2996GLM
  • 86300
Mallory
  • 9-76508
OMC Stern Drive
  • 3852560
  • 911823
Volvo Penta
  • 3852560
1Outdrive Seal N/A
18-4248Johnson/Evinrude Outboard
  • 311598
Mallory
  • 9-60408
OMC Stern Drive
  • 311598
  • 3852105
Volvo Penta
  • 3852105
1Drain/Fill Plug Washer N/A
Upper Unit Seal Kit
Your Price:
$68.99

Upper Unit Seal Kit

676-18-2666

Additional Details:

  • For: 100-245 Stringer Units (1968-1972)

Interchanges/Replaces

GLM

  • 87651

OMC Stern Drive

  • 981799

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-0939GLM
  • 33050
Johnson/Evinrude Outboard
  • 315189
OMC Stern Drive
  • 315189
1Upper Gearcase Dipstick Gasket N/A
18-2073GLM
  • 86090
OMC Stern Drive
  • 313191
  • 907967
  • 981268
  • 981587
4Oil Seal N/A
18-3111GLM
  • 86100
OMC Stern Drive
  • 907774
1Water Pump Shaft Seal N/A
18-4248Johnson/Evinrude Outboard
  • 311598
Mallory
  • 9-60408
OMC Stern Drive
  • 311598
  • 3852105
Volvo Penta
  • 3852105
2Drain/Fill Plug Washer N/A
18-7103GLM
  • 81190
Johnson/Evinrude Outboard
  • 308624
Mercruiser Stern Drive
  • 25-29845
Mercury Marine
  • 25-29845
OMC Stern Drive
  • 308624
4O-Ring N/A
18-7107GLM
  • 82480
Johnson/Evinrude Outboard
  • 313175
Mercruiser Stern Drive
  • 25-67202
Mercury Marine
  • 25-67202
OMC Stern Drive
  • 313175
1O-Ring N/A
18-7121GLM
  • 82350
Mallory
  • 9-76651
Mercruiser Stern Drive
  • 25-35029
  • 27-882613
  • 802231
Mercury Marine
  • 25-35029
OMC Stern Drive
  • 308621
1O-Ring N/A
18-7134Chrysler/Force/US Marine
  • 25-20195
  • 25-F40342
GLM
  • 81120
Johnson/Evinrude Outboard
  • 303059
  • 339543
Mallory
  • 9-76511
Mercruiser Stern Drive
  • 25-20195
  • 25-201951
Mercury Marine
  • 25-20195
OMC Stern Drive
  • 303059
1O-Ring N/A
18-7146GLM
  • 81220
Johnson/Evinrude Outboard
  • 554545
Mallory
  • 9-76539
Mercruiser Stern Drive
  • 25-47632
  • 25-864701
OMC Stern Drive
  • 554545
1O-Ring 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
18-7172GLM
  • 82360
Johnson/Evinrude Outboard
  • 553126
Mallory
  • 9-76552
Mercruiser Stern Drive
  • 25-31305
Mercury Marine
  • 25-31305
OMC Stern Drive
  • 553126
1O-Ring 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
18-7198Chrysler/Force/US Marine
  • 25-45710
GLM
  • 81270
Honda Outboard
  • 91353-ZW1-003
Mallory
  • 9-76504
Mercruiser Stern Drive
  • 25-45710
  • 25-457101
Mercury Marine
  • 25-45710
  • 25-457101
OMC Stern Drive
  • 308626
2O-Ring N/A
NSSOMC Stern Drive
  • 308592
2Gasket, CoverNo ImageN/A
NSSOMC Stern Drive
  • 308592
2Gasket, CoverNo ImageN/A
Upper Unit Seal Kit
Your Price:
$103.99
This Part has options, please click the button below to order.

Upper Unit Seal Kit

676-18-2726

Additional Details:

  • Fits: Volvo SX-A/DPS-A (2007& Up)

Interchanges/Replaces

Volvo Penta

  • 3888917
  • 876392

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
NSSVolvo Penta
  • 3841964
1SealNo ImageN/A
NSSVolvo Penta
  • 3852272
1SealNo ImageN/A
18-7116Chrysler/Force/US Marine
  • 25-62704
  • 25-F24342
GLM
  • 81100
Johnson/Evinrude Outboard
  • 303067
Mallory
  • 9-43631
Mercruiser Stern Drive
  • 25-62704
  • 802206
Mercury Marine
  • 25-20633
  • 25-22174
  • 25-62704
  • 25-85148
  • 802206
OMC Stern Drive
  • 303067
  • 3852045
Volvo Penta
  • 3852045
1O-Ring N/A
18-0175GLM
  • 81080
Mercruiser Stern Drive
  • 25-26543
Mercury Marine
  • 25-26543
1O-Ring 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
18-7183GLM
  • 45080
Mallory
  • 9-76557
OMC Stern Drive
  • 3852320
  • 925093
Volvo Penta
  • 3852320
  • 925093
  • 975676
1O-Ring N/A
18-7122OMC Stern Drive
  • 3852308
Volvo Penta
  • 3852308
  • 925095
  • 967344
1O-Ring N/A
18-7154Volvo Penta
  • 191058
  • 925059
  • 949656
1O-Ring N/A
18-25250Volvo Penta
  • 3863085
1Sealing Ring N/A
Upper Unit Seal Kit
Your Price:
$56.99

Upper Unit Seal Kit

676-18-2673

Additional Details:

  • For: All Cobra (1986-1989)

Interchanges/Replaces

GLM

  • 87654

OMC Stern Drive

  • 984459
  • 986364
  • 987603

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-0166GLM
  • 86620
OMC Stern Drive
  • 911705
2Grommet N/A
18-0884GLM
  • 33910
OMC Stern Drive
  • 911733
1Water Cover Gasket N/A
18-0911GLM
  • 34771
OMC Stern Drive
  • 911698
1Water Pump Base Gasket N/A
18-2067GLM
  • 86530
OMC Stern Drive
  • 911685
1Oil Seal N/A
18-2068GLM
  • 86610
OMC Stern Drive
  • 3853655
  • 911701
  • 915702
  • 916058
1Oil Seal N/A
18-2541GLM
  • 86630
OMC Stern Drive
  • 911704
1Rubber Seal N/A
18-2916GLM
  • 34770
OMC Stern Drive
  • 911702
1Water Pump Housing Gasket N/A
18-2918GLM
  • 34730
Mallory
  • 9-62650
OMC Stern Drive
  • 911836
  • 915840
1Outdrive Gasket N/A
18-2996GLM
  • 86300
Mallory
  • 9-76508
OMC Stern Drive
  • 3852560
  • 911823
Volvo Penta
  • 3852560
1Outdrive Seal N/A
18-7107GLM
  • 82480
Johnson/Evinrude Outboard
  • 313175
Mercruiser Stern Drive
  • 25-67202
Mercury Marine
  • 25-67202
OMC Stern Drive
  • 313175
1O-Ring N/A
18-7116Chrysler/Force/US Marine
  • 25-62704
  • 25-F24342
GLM
  • 81100
Johnson/Evinrude Outboard
  • 303067
Mallory
  • 9-43631
Mercruiser Stern Drive
  • 25-62704
  • 802206
Mercury Marine
  • 25-20633
  • 25-22174
  • 25-62704
  • 25-85148
  • 802206
OMC Stern Drive
  • 303067
  • 3852045
Volvo Penta
  • 3852045
1O-Ring N/A
18-7138GLM
  • 83250
Mallory
  • 9-76533
OMC Stern Drive
  • 318717
2O-Ring 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
2O-Ring N/A
18-7169Chrysler/Force/US Marine
  • 25-F24278
GLM
  • 82380
Mallory
  • 9-76551
Mercruiser Stern Drive
  • 25-35984
  • 25-70937
OMC Stern Drive
  • 911686
1O-Ring N/A
18-7403GLM
  • 81280
Mallory
  • 9-76567
OMC Stern Drive
  • 909316
1O-Ring N/A
18-7407GLM
  • 82430
Johnson/Evinrude Outboard
  • 911700
OMC Stern Drive
  • 3852531
  • 911700
Volvo Penta
  • 3852531
1O-Ring N/A
Upper Unit Seal Kit
Your Price:
$35.99

Upper Unit Seal Kit

676-18-2644

Additional Details:

  • For: Alpha I Gen II

Interchanges/Replaces

GLM

  • 87501

Mallory

  • 9-74302

Mercruiser Stern Drive

  • 26-88397A1

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-2003GLM
  • 85030
Mallory
  • 9-76102
Mercruiser Stern Drive
  • 26-32080
  • 26-36054
  • 26-68493
  • 26-823894
  • 26-823894B
1Oil Seal N/A
18-2056Chrysler/Force/US Marine
  • 26-66302
GLM
  • 85060
Mallory
  • 9-76130
Mercruiser Stern Drive
  • 26-37259
  • 26-89237
  • 26-96503
  • 26-965031
Mercury Marine
  • 26-56394
  • 26-66302
2Oil Seal N/A
18-2715GLM
  • 12930
Mallory
  • 9-78005
Mercruiser Stern Drive
  • 24-17997A1
1Check Valve Kit N/A
18-2944GLM
  • 85140
Mallory
  • 9-76512
Mercruiser Stern Drive
  • 26-45577
  • 26-455771
  • 26-45577B
  • 26-45577B1
1Seal Ring Gasket N/A
18-2945Chrysler/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
18-3289Mercruiser Stern Drive
  • 26-864319
1Double Lip Seal N/A
18-7117GLM
  • 82150
Johnson/Evinrude Outboard
  • 303360
Mallory
  • 9-76507
Mercruiser Stern Drive
  • 25-35027
Mercury Marine
  • 25-35027
1O-Ring N/A
18-7161GLM
  • 80420
Mallory
  • 9-76546
Mercruiser Stern Drive
  • 25-32546
Mercury Marine
  • 25-32546
1O-Ring N/A
18-7169Chrysler/Force/US Marine
  • 25-F24278
GLM
  • 82380
Mallory
  • 9-76551
Mercruiser Stern Drive
  • 25-35984
  • 25-70937
OMC Stern Drive
  • 911686
1O-Ring N/A
18-7420GLM
  • 82110
Mallory
  • 9-76565
Mercruiser Stern Drive
  • 25-21836
Mercury Marine
  • 25-21836
Mercury Race Outboard
  • 25-21836
Mercury Race Sterndrive
  • 25-21836
Mercury Sport Jet
  • 25-21836
2O-Ring 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
2O-Ring
18-2430Mallory
  • 9-60105
Mercruiser Stern Drive
  • 26-830749
Mercury Marine
  • 26-830749
1Drain Screw Gasket N/A
NSSMercruiser Stern Drive
  • 26-88397
1SealNo ImageN/A
Upper Unit Seal Kit
Your Price:
$24.99

Upper Unit Seal Kit

676-18-2648

Additional Details:

  • For: #1 Units (including Alpha)(Also fits 888 stern drive)

Interchanges/Replaces

GLM

  • 87500

Mallory

  • 9-74303

Mercruiser Stern Drive

  • 26-32511A1
  • 26-32511B1

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-0894GLM
  • 31150
Mallory
  • 9-60037
Mercruiser Stern Drive
  • 27-55810
  • 27-558101
1Water Pocket Cover Gasket N/A
18-2003GLM
  • 85030
Mallory
  • 9-76102
Mercruiser Stern Drive
  • 26-32080
  • 26-36054
  • 26-68493
  • 26-823894
  • 26-823894B
1Oil Seal N/A
18-2049GLM
  • 85020
Mallory
  • 9-76111
Mercruiser Stern Drive
  • 26-32511
1Oil Seal N/A
18-2056Chrysler/Force/US Marine
  • 26-66302
GLM
  • 85060
Mallory
  • 9-76130
Mercruiser Stern Drive
  • 26-37259
  • 26-89237
  • 26-96503
  • 26-965031
Mercury Marine
  • 26-56394
  • 26-66302
1Oil Seal N/A
18-2944GLM
  • 85140
Mallory
  • 9-76512
Mercruiser Stern Drive
  • 26-45577
  • 26-455771
  • 26-45577B
  • 26-45577B1
1Seal Ring Gasket N/A
18-2945Chrysler/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
18-3110GLM
  • 12830
Mallory
  • 9-43604
Mercruiser Stern Drive
  • 26-38970
Mercury Marine
  • 26-29677
  • 26-36557A1
  • 26-38970
1Water Pump Housing Bushing 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
2O-Ring N/A
18-7161GLM
  • 80420
Mallory
  • 9-76546
Mercruiser Stern Drive
  • 25-32546
Mercury Marine
  • 25-32546
1O-Ring N/A
18-7169Chrysler/Force/US Marine
  • 25-F24278
GLM
  • 82380
Mallory
  • 9-76551
Mercruiser Stern Drive
  • 25-35984
  • 25-70937
OMC Stern Drive
  • 911686
1O-Ring N/A
18-7445GLM
  • 80190
Mallory
  • 9-76568
Mercruiser Stern Drive
  • 25-55801
1O-Ring N/A
18-0521GLM
  • 85150
Mercruiser Stern Drive
  • 26-36557
Mercury Marine
  • 26-36557
1Water Tube Rubber Seal N/A
Upper Water Pump Gasket
Your Price:
$1.99

Upper Water Pump Gasket

676-18-2824

Interchanges/Replaces

GLM

  • 31070

Mallory

  • 9-60029

Mercury Marine

  • 27-19551
  • 27-32770
Upper Water Pump Gasket (Priced Per Pkg of 2)
Your Price:
$2.99

Upper Water Pump Gasket (Priced Per Pkg of 2)

676-18-2824-9

Interchanges/Replaces

GLM

  • 31070

Mallory

  • 9-60029

Mercury Marine

  • 27-19551
  • 27-32770
Upper Water Pump Seal
Your Price:
$4.99

Upper Water Pump Seal

676-18-3013

Additional Details:

  • For: 4-Stroke O/B's 25/30/40/45/50 Hp SN: 0G760300 & Up

Interchanges/Replaces

Chrysler/Force/US Marine

  • 26-821309

Mercury Marine

  • 26-821309
V-8 Delco Est Conversion Kit
Your Price:
$619.99

V-8 Delco Est Conversion Kit

676-18-5514

Key Features:

  • Converts 8 cyl GM Engines to electronic

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-5443Crusader
  • 7243200
GLM
  • 72113
Indmar
  • 556132
Mallory
  • 9-29708
Mercruiser Stern Drive
  • 817378
  • 817378T
  • 898253T27
OMC Stern Drive
  • 3854002
  • 986644
Volvo Penta
  • 3854002
1Ignition Coil N/A
18-55151Delco EST Distributor Coil to Module Harness N/A
18-55161DELCO EST DISTRIBUTOR TIMING TOOL N/A
18-55171DELCO EST SHIFT INTERRUPT HARNESS N/A
18-5484-1Mallory
  • 9-26700
  • YLE624AV
Mercruiser Stern Drive
  • 805222A1
OMC Stern Drive
  • 3850399
  • 3857400
Volvo Penta
  • 3857400
  • 3857449
1Delco HEI Distributor (GM V8) N/A
18-8832-1CDI
  • 631-0006
Mallory
  • 9-28011
Mercruiser Stern Drive
  • 84-816608A68
  • 84-816608Q68
1Spark Plug Wire Set N/A
18-26812Indmar
  • 801010
Mallory
  • 9-26812
1HEI Coil Connector GRAY N/A
V-8 Sierra Electronic Distributor Conversion Kit
Your Price:
$650.99

V-8 Sierra Electronic Distributor Conversion Kit

676-18-5520

Key Features:

  • Converts 8 cyl. GM Engines to Electronic

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-5435CDI
  • E18-0005
Chrysler Inboard
  • 200691
Crusader
  • 41080
Mallory
  • 9-29703
1Ignition Coil N/A
18-8803-2CDI
  • 631-0001
Mallory
  • 9-28000
  • 9-28010
  • 9-28012
  • 9-28021
Mercruiser Stern Drive
  • 84-43376A9
Mercury Marine
  • 84-813720A10
  • 84-813720A9
  • 84-816761A9
  • 84-816761Q10
  • 84-816761Q9
OMC Stern Drive
  • 503752
  • 503755
1Spark Plug Wire Set N/A
18-5494-21Electronic Distributor, Chev V8 Elec. IGN. N/A
Valve Cover Gasket
Your Price:
$6.99

Valve Cover Gasket

676-18-0808

Interchanges/Replaces

Yamaha Outboard

  • 6G5-11382-00-00
  • 6G5-11382-A1-00
Valve Cover Gasket
Your Price:
$17.99

Valve Cover Gasket

676-18-0311

Additional Details:

  • For: MCM 175, 185, 205 & 4.3L/LX with metal rocker covers (1985-1995)

Interchanges/Replaces

Crusader

  • 97686

GLM

  • 30359

Mallory

  • 9-61316

Mercruiser Stern Drive

  • 27-11988
  • 27-8M0077607

OMC Stern Drive

  • 3854942

Volvo Penta

  • 3854942