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Overhaul Gasket Set 

# 676-18-4359
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Key Features:

  • Does not Include Head Gaskets

Interchanges/Replaces

GLM

  • 39520

Mallory

  • 9-64204

Mercury Marine

  • 27-815791A90
  • 27-815791A92
  • 27-815809A90
  • 27-815810A90

List of Containing Parts

Sierra Item # OE/Competitor # Quantity Description Image Comments
18-0135GLM
  • 32880
Mercury Marine
  • 27-78246
  • 27-782461
2Adapter Cover Gasket N/A
18-0182GLM
  • 30610
Johnson/Evinrude Outboard
  • 310058
Mallory
  • 9-60002
Mercury Marine
  • 27-62386
  • 27-62386001
Mercury Race Outboard
  • 27-62386001
2Thermostat Gasket N/A
18-0384GLM
  • 32350
Mercury Marine
  • 27-817533
  • 27-89221
  • 27-892211
  • 27-8M0027781
3Carburetor Gasket N/A
18-0641GLM
  • 37590
Mercury Marine
  • 27-828292
Mercury Sport Jet
  • 27-828292
3Carburetor Mounting Gasket N/A
18-0642GLM
  • 37560
Mallory
  • 9-60051
Mercury Marine
  • 27-19050
  • 27-190502
  • 27-190503
  • 27-190505
1Divider Plate Gasket N/A
18-0643GLM
  • 37570
Mercury Marine
  • 27-183071
  • 27-183076
1Powerhead Base Gasket N/A
18-0644GLM
  • 37530
Mercury Marine
  • 27-146972
Mercury Sport Jet
  • 27-146972
1Reed Plate Gasket N/A
18-0645GLM
  • 37540
Mallory
  • 9-60056
Mercury Marine
  • 27-167371
Mercury Sport Jet
  • 27-167371
1Adapter Plate Gasket N/A
18-0646GLM
  • 37550
Mercury Marine
  • 27-813859
  • 27-883775
Mercury Sport Jet
  • 27-813859
  • 27-881034
1Reed Plate Gasket N/A
18-0838Yamaha Outboard
  • 93210-37M25-00
1O-Ring N/A
18-0858GLM
  • 81430
Mallory
  • 9-76516
Mercruiser Stern Drive
  • 25-54029
Mercury Marine
  • 25-54029
Mercury Sport Jet
  • 25-54029
1O-Ring N/A
18-0860GLM
  • 81520
Mercruiser Stern Drive
  • 25-62700
Mercury Marine
  • 25-62700
Mercury Sport Jet
  • 25-62700
1O-Ring N/A
18-0936GLM
  • 31990
Mallory
  • 9-60057
Mercury Marine
  • 27-67624
  • 27-78690
  • 27-78690002
Mercury Sport Jet
  • 27-78690
  • 27-78690002
2Relief Valve Plate Gasket N/A
18-2509GLM
  • 31690
Mercury Marine
  • 27-67751
3Carburetor Mounting Gasket N/A
18-2511GLM
  • 32510
Mercury Marine
  • 27-67074
  • 27-88727
  • 27-99173
  • 27-99173 2
  • 27-991731
  • 27-991734
1Drive Shaft Housing to Exhaust Plate Gasket N/A
18-2513GLM
  • 30890
Mallory
  • 9-60049
  • 9-60050
Mercury Marine
  • 27-11338
  • 27-67208
Mercury Sport Jet
  • 27-11338
2Crankcase Gasket (Cyl. Block Sealing V-6) 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
18-2915GLM
  • 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
18-3110GLM
  • 12830
Mallory
  • 9-43604
Mercruiser Stern Drive
  • 26-38970
Mercury Marine
  • 26-29677
  • 26-36557A1
  • 26-38970
2Water 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
1O-Ring N/A
18-7157GLM
  • 83410
Mallory
  • 9-76542
Mercruiser Stern Drive
  • 25-29976
Mercury Marine
  • 25-29976
1O-Ring N/A
18-7159GLM
  • 83440
Mallory
  • 9-76544
Mercruiser Stern Drive
  • 25-31534
  • 25-48451
Mercury Marine
  • 25-31534
1O-Ring N/A
18-7174Chrysler/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
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
18-8305Mercury Marine
  • 26-814754
  • 42838
  • 69668
  • 88726
Mercury Race Outboard
  • 428381
  • 69668
Mercury Sport Jet
  • 26-814754
1Divider Plate Seal N/A
18-2506-1Mallory
  • 9-60046
Mercury Marine
  • 27-99176
  • 27-991762
  • 27-991763
  • 27-991764
    • Mercury Race Outboard
    • 27-99176
    		1Exhaust Plate Gasket N/A
    18-0970Chrysler/Force/US Marine
    • 27-987691
    GLM
    • 32960
    Mallory
    • 9-60054
    Mercury Marine
    • 27-98769
    • 27-987691
    Mercury Sport Jet
    • 27-987691
    		1Fuel Pump Base Gasket N/A
    18-7817Chrysler/Force/US Marine
    • 21-42990A10
    • 21-42990A7
    • 21-42990A8
    GLM
    • 40290
    Mercury Marine
    • 21-42990A1
    • 21-42990A10
    • 21-42990A11
    • 21-42990A2
    • 21-42990A3
    • 21-42990A4
    • 21-42990A5
    • 21-42990A6
    • 21-42990A7
    • 21-42990A8
    • 21-42990A9
    • 21-857005A1
    Mercury Sport Jet
    • 21-42990A11
    • 21-857005A1
    		1Fuel Pump Kit N/A
    MSRP: $162.99
    Your Price: $137.99
     You Save: 15% off MSRP!

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