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OMC Sterndrive/Cobra Lower Unit Seal Kits

Refine Parts List
Model/Liter

Year

(1968 to 1991)

Model/Liter

Year

Sierra Lower Gearcase Seal Kit

Mallory Lower Gearcase Seal Kit

2.31987-199018-2671 9-74401
2.5(1)1982-198618-2664 -
2.5(2)198618-2671 9-74401
3(1)1982-198618-2664 -
3(2)1986-199118-2671 9-74401
3.81981-198618-2665 9-74400
4.3(1)1985-198618-2665 9-74400
4.3(2)1986-199118-2672 9-74402
5(1)1982-198618-2665 9-74400
5(2)1986-199118-2672 9-74402
5.7(1)1982-198618-2665 9-74400
5.7(2)1986-198918-2672 9-74402
5.7(3)1990-199118-2672 9-74402
5.81989-199018-2672 9-74402
80196918-2663 -
90197018-2663 -
100197218-2663 -
100197318-2663 -
1201968-197218-2663 -
1201973-197718-2663 -
1201978-198118-2664 -
1401973-197718-2663 -
1401978-198118-2664 -
1551968-197218-2663 -
165197218-2663 -
1651973-197618-2663 -
170197418-2663 -
1751975-197718-2663 -
185196818-2663 -
1851978-198018-2665 9-74400
1901974-197718-2663 -
200196818-2663 -
2001979-198118-2665 9-74400
2101968-197018-2663 -
215197118-2663 -
225197218-2663 -
2251973-197618-2663 -
225197818-2665 9-74400
2301979-198118-2665 9-74400
235197118-2663 -
2351975-197718-2663 -
240197818-2665 9-74400
245197218-2663 -
2451973-197518-2663 -
250197918-2665 9-74400
2601979-198118-2665 9-74400
262198918-2672 9-74402
3501988-198918-2672 9-74402

Model/Liter

Year

Sierra Lower Gearcase Seal Kit

Mallory Lower Gearcase Seal Kit

Notes:
(1) : Except Cobra
(2) : Cobra
(3) : Except L.E.
Refine Parts List
Model/Liter

Year

(1968 to 1991)
Blowout
Save 15%-36% Off.
Lower Unit Seal Kit - 18-2663 - Sierra
Great Days Sale Price: $34.95
Save: $20.06
(36% Off $55.01)
Part # 18-2663 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 23 hrs 47 mins.
No Reviews | Write Review | Ask Question
Replaces OEM part #
  • OMC 981797
    100-245 Stringer Unit ( 1968-77 )


  • Contains:
  • ( 1 ) 18-0168 Grommet, replaces O.E.# 908594
    ( 4 ) 18-2012 Oil Seal, replaces O.E.# 310599
    ( 1 ) 18-2020 Oil Seal, replaces O.E.# 310649
    ( 2 ) 18-2058 Oil Seal, replaces O.E.# 313353
    ( 1 ) 18-2851 Swivel Bearing To Lower Gear Case Gasket, replaces O.E.# 313368
    ( 2 ) 18-4248 Washer, replaces O.E.# 311598
    ( 4 ) 18-7120 O-Ring, replaces O.E.# 307853, 322598
    ( 1 ) 18-7129 O-Ring, replaces O.E.# 314491
    ( 1 ) 18-7135 O-Ring, replaces O.E.# 310584
    ( 1 ) 18-7167 O-Ring, replaces O.E.# 310414
Omc S/D Lwr Unit Seal Kt - 18-2664 - Sierra
Great Days Sale Price: $41.73
Save: $22.61
(35% Off $64.34)
Part # 18-2664 ValueShip™ Eligible
SHIPS TOMORROW!* if ordered in 23 hrs 47 mins.
No Reviews | Write Review | Ask Question
Replaces OEM part #
  • OMC 982947
    4 Cyl ( 400 0 Stringer Unit ( 1978-86 )


  • Contains:
    ( 1 ) 18-0110 Shift Housing Gasket, replaces O.E.# 324670
    ( 2 ) 18-3133 Housing Screw, replaces O.E.# 908158
    ( 1 ) 18-0188 Washer, replaces O.E.# 909748
    ( 1 ) 18-2020 Oil Seal, replaces O.E.# 310649
    ( 2 ) 18-2058 Oil seal, replaces O.E.# 313353
    ( 2 ) 18-2060 Oil Seal, replaces O.E.# 321467
    ( 4 ) 18-3722 Locknut, replaces O.E.# 121731
    ( 2 ) 18-4248 Washer, replaces O.E.# 311598
    ( 1 ) 18-7101 O-Ring, replaces O.E.# 305739
    ( 1 ) 18-7102 O-Ring, replaces O.E.# 307450
    ( 1 ) 18-7120 O-Ring, replaces O.E.# 307853, 322598
    ( 1 ) 18-7127 O-Ring, replaces O.E.# 313446br>( 1 ) 18-7130 O-Ring, replaces O.E.# 314728
    ( 1 ) 18-7178 O-Ring, replaces O.E.# 320140
    ( 1 ) 18-7404 O-Ring, replaces O.E.# 909747
    ( 4 ) 18-7475 Quad Ring, replaces O.E.# 332583
    ( 1 ) 18-7168 O-Ring, replaces O.E.# 202893
    ( 2 ) 18-7409 O-Ring, replaces O.E.# 911871
    ( 2 ) 18-2001 Oil Seal, replaces O.E.# 330137
    ( 1 ) 18-7479 O-Ring, replaces O.E.# --
    ( 2 ) 18-3153 S.S. Bolt, replaces O.E.# 908158
  • Upper Unit Seal Kit - 18-2665 - Sierra
    Your Price: $49.39
    Save: $22.72
    (31% Off $72.11)
    Part # 18-2665 ValueShip™ Eligible
    SHIPS TOMORROW!* if ordered in 23 hrs 47 mins.
    No Reviews | Write Review | Ask Question
    Replaces OEM part #
    • OMC 982946
      V6, V8 ( 800 ) Stringer Unit ( 1978-86 )

    • Contains:
      ( 1 ) 18-0110 Shift Housing Gasket, replaces O.E.# 324670
      ( 2 ) 18-3133 Housing Screw, replaces O.E.# 908158
      ( 1 ) 18-0188 Washer, replaces O.E.# 909748
      ( 2 ) 18-2002 Oil Seal, replaces O.E.# 320862
      ( 1 ) 18-2020 Oil Seal, replaces O.E.# 310649
      ( 2 ) 18-2058 Oil Seal,replaces O.E.# 313353
      ( 2 ) 18-2060 Oil Seal, replaces O.E.# 321467
      ( 1 ) 18-2911 Swivel Bearing Housing Gasket, replaces O.E.# 910236
      ( 6 ) 18-3722 Locknut, replaces O.E.# 121731
      ( 2 ) 18-4248 Washer, replaces O.E.# 311598
      ( 1 ) 18-7101 O-Ring, replaces O.E.# 305739
      ( 1 ) 18-7102 O-Ring, replaces O.E.# 307450
      ( 1 ) 18-7120 O-Ring, replaces O.E.# 307853, 322598
      ( 1 ) 18-7130 O-Ring, replaces O.E.# 314728
      ( 1 ) 18-7142 O-Ring, replaces O.E.# 322119
      ( 1 ) 18-7178 O-Ring, replaces O.E.# 320140
      ( 2 ) 18-7403 O-Ring, replaces O.E.# 909316
      ( 1 ) 18-7404 O-Ring, replaces O.E.# 909747
      ( 4 ) 18-7475 Quad Ring, replaces O.E.# 332583
      ( 1 ) 18-7168 O-Ring, replaces O.E.# 202893
      ( 1 ) 18-7479 O-Ring, replaces O.E.# --
      ( 2 ) 18-3153 S.S. Bolt, replaces O.E.# 908152
    Lower Unit Seal Kit Omc Sterndrive/Cobra - 18-2671 - Sierra
    Your Price: $27.95
    Save: $13.57
    (32% Off $41.52)
    Part # 18-2671 ValueShip™ Eligible
    SHIPS TOMORROW!* if ordered in 23 hrs 47 mins. Replaces OEM part #
    • OMC 985612
      All 4 Cyl. Cobra ( 1986-89 )


    • Contains:
      ( 1 ) 18-0880 Shift Cover Gasket, replaces O.E.# 911878
      ( 2 ) 18-0166 Grommet, replaces O.E.# 911705
      ( 1 ) 18-0190 Wiper, replaces O.E.# 912157
      ( 2 ) 18-4248 Washer, replaces O.E.# 311598
      ( 1 ) 18-7127 O-Ring, replaces O.E.# 313446
      ( 1 ) 18-7130 O-Ring, replaces O.E.# 314728
      ( 1 ) 18-7137 O-Ring, replaces O.E.# 318372
      ( 3 ) 18-7138 O-Ring, replaces O.E.# 318717
      ( 2 ) 18-7145 O-Ring, replaces O.E.# 333572
      ( 5 ) 18-7475 Quad Ring, replaces O.E.# 332584
      ( 2 ) 18-2001 Oil Seal, replaces O.E.# 330137
    Lower Unit Seal Kit Omc Sterndrive/Cobra - 18-2672 - Sierra
    Your Price: $45.21
    Save: $20.17
    (30% Off $65.38)
    Part # 18-2672 ValueShip™ Eligible
    SHIPS TOMORROW!* if ordered in 23 hrs 47 mins.
    Hurry! Only 1 left in stock
    No Reviews | Write Review | Ask Question
    Replaces OEM part #
    • OMC 985613
    • OMC 984458
    • OMC 439967
      All V6 / V8 Cobra


    • ( 1 ) 18-0880 Shift Cover Gasket, replaces O.E.# 911878
      ( 2 ) 18-0166 Grommet, replaces O.E.# 911705
      ( 1 ) 18-0190 Wiper, replaces O.E.# 912157
      ( 2 ) 18-2002 Oil Seal, replaces O.E.# 320862
      ( 2 ) 18-4248 Washer, replaces O.E.# 311598
      ( 1 ) 18-7130 O-Ring, replaces O.E.# 314728
      ( 1 ) 18-7137 O-Ring, replaces O.E.# 318372
      ( 3 ) 18-7138 O-Ring, replaces O.E.# 318717
      ( 1 ) 18-7142 O-Ring, replaces O.E.# 322119
      ( 2 ) 18-7145 O-Ring, replaces O.E.# 333572
      ( 5 ) 18-7475 Quad Ring, replaces O.E.# 332584
      ( 1 ) 18-0442 Water Passage Gasket, replaces O.E.# 915719
    Lower Unit Seal Kit - 18-2783 - Sierra
    Great Days Sale Price: $107.79
    Save: $16.21
    (13% Off $124.00)
    Part # 18-2783 ValueShip™ Eligible
    SHIPS TOMORROW!* if ordered in 23 hrs 47 mins.
    Hurry! Only 1 left in stock
    No Reviews | Write Review | Ask Question
    Replaces OEM part #
    • OMC 986629
      King Cobra Lower Unit - 1990
    Representative Photo only.
    Seal Kit, Lower Unit - 18-2791 - Sierra
    Your Price: $76.79
    Save: $40.62
    (34% Off $117.41)
    Part # 18-2791 ValueShip™ Eligible
    SHIPS TOMORROW!* if ordered in 23 hrs 47 mins.
    No Reviews | Write Review | Ask Question
    Replaces OEM part #
    • OMC 987251
    • OMC 3850597
    • VOLVO 3850597

    • Fits: OMC 3.0L, 5.0L ( 1994 ), 3.2L ( 1992-93 ), 5.7L ( 1992-94 ), 7.4L ( 1992-95 ) 8.2L ( 1992-93 )
    Mallory Seal Kit, Gear Housing 9-74400
    Mallory Seal Kit, Gear Housing 9-74400
    Great Days Sale Price: $46.66
    Save: $25.45
    (35% Off $72.11)
    Part # 9-74400 ValueShip™ Eligible
    SHIPS TOMORROW!* if ordered in 23 hrs 47 mins.
    Hurry! Only 1 left in stock
    No Reviews | Write Review | Ask Question
    Replaces GLM #:87630
    Replaces Original Equipment Manufacturer(OEM):OMC
    Replaces Original Equipment Manufacturer # (OEM #):982946
    Fits Application:V-6, V-8 800 series Stringer Units 1978-86
    Sierra
    Full StarFull StarFull StarFull StarFull Star Based On 2 Reviews | Write Review
    Full StarFull StarFull StarFull StarFull StarSeal kit OMC
    by Keith from Coloma, Michigan on July 21, 2014
    Perfect kit, it would be nice if you would include it with the gear set, just charge more for it.
    Was this review helpful?
    Full StarFull StarFull StarFull StarFull StarGary
    by Gary from Youngville, North Carolina on July 24, 2011
    Very satisfied.
    Was this review helpful?
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