same day shipping clock icon
free shipping box icon
price tag icon

OMC Internal Engine Parts

guidebook

Parts Selection Guide

Find the parts you need

Clear
  • 1) Engine Manufacturer:
  • 2) Part Type:
  • 3) Select Model:
      • Sierra 18-2945-9 Drain Screw Gasket (2Pk) Replaces 12-191833
        List Price: $2.07
        Starting At: $1.58

        Sierra 18-2945-9 Drain Screw Gasket (2 pack) This Sierra 18-2945 Drain Screw Gasket is used with 3/8-16 drain/fill screw found on all Mercruiser and most Mercury/Mariner O/Bs. This gasket is used in most lower units and sea water pumps. Sold as a 2...

        Add to Cart
      • Sierra 18-4248 Drain/Fill Plug Washer Replaces 0311598
        List Price: $0.93
        Starting At: $0.71

        Sierra 18-4248 Drain/Fill Plug Washer for Johnson, Evinrude, OMC Sierra high-quality engine parts are designed to meet OEM specifications. Plastic plug used with Drain Screw 18-2387. Interchangeable with: Johnson/Evinrude...

        Add to Cart
      • Sierra 18-2613 Outdrive Gasket Set Replaces 0508105
        List Price: $4.96
        Starting At: $4.02

        Sierra 18-2613 OMC Cobra Sterndrive Outdrive Gasket Set For Use On All OMC "Clutch Dog" Cobra Sterndrives 1986 - 1993. Not For Use On King Cobra Sterndrives. Kit Includes: (1) 18-2918 Outdrive Gasket (1) 18-2996 Outdrive Seal (2) 18-7153...

        Add to Cart
      • Exhaust Manifold Gasket , Mercury - Mercruiser 27-33395
        List Price: $10.70
        Starting At: $8.07

        Exhaust Manifold Gasket , Mercury - Mercruiser 27-33395 Fits MCM/MIE GM V-8 (283, 305, 350,  and 377 CID) engines Replaces: GLM 31100 Mallory 9-61401 Felpro 17420 OMC 3852468 Redline RL0872 Sierra 18-0872

        Add to Cart
      • Sierra 18-2946 Head Gasket Replaces 27-52364
        List Price: $30.29
        Now: $21.20

        Head Gasket for 3.0L Mercruiser, Volvo, OMC Replaces: Mercruiser OEM 27-52364, 27-810841, F15000204 OMC and Volvo OEM 3853336, 908611, 913274, 914814 Chriscraft OEM 16.50-00204 Johnson/Evinrude Outboard 908611, 0914812, 3853336 Mallory 9-63700 ...

        Add to Cart
      • Sierra 18-1402 Hydraulic Lifter Replaces 72638
        List Price: $11.53
        Starting At: $8.77

        Sierra 18-1402 Hydraulic Lifter Sierra high-quality replacement parts are designed to meet OEM specifications. For OMC & Volvo 3.0L/181 CID. Fits MCM/MIE GM 4 cyl. V-6 & V-8 (283, 305, 327, 350, 454 & 482 cid) engines. Interchangeable...

        Add to Cart
      • Sierra 18-0347 Valve Cover Gasket Replaces 27-851040
        List Price: $13.16
        Starting At: $10.01

        Sierra 18-0347 Valve Cover Gasket for 2.5 & 3.0L Mercruiser, Volvo, OMC Sierra high-quality replacement engine parts are designed to meet OEM specifications. For GM 153 & 181 CID (2.5L & 3.0L) Interchangeable...

        Add to Cart
      • Sierra 18-0550 Plug Off Cap Replaces 0764799
        List Price: $10.51
        Starting At: $7.99

        Sierra 18-0550 OMC Exhaust Manifold Plug Off Cap 1.25" I.D. Sierra high-quality engine parts are designed to meet OEM specifications. For V8 Stern Drives and Inboards 1977 - present. I.D.: 1-1/4" Interchangeable...

        Add to Cart
      • Sierra 18-7145 O-Ring Replaces 25-64068
        List Price: $0.98
        Starting At: $0.74

        Sierra 18-7145 O-Ring Sierra high-quality engine parts are designed to meet OEM specifications. I.D.: 0.250" Width: 0.100" Interchangeable with: GLM 81080 Johnson/Evinrude Outboard 333572 Mallory 9-76500 Mercruiser Stern...

        Add to Cart
      • Sierra 18-3876 Head Gasket Replaces 27-75611001
        List Price: $42.22
        Starting At: $29.55

        Sierra 18-3876 Head Gasket for 5.0 & 5.7L OMC, Volvo, Mercruiser Sierra high-quality engine parts are designed to meet OEM specifications. Fits MCM/MIE GM V-8 (283, 305, 327, 350 & 377 cid) engines. Fits: 305 (5.0L)/350 (5.7L) CID...

        Add to Cart
      • Sierra 18-0518 Valve Stem Seal Replaces 26-34217
        List Price: $3.66
        Starting At: $2.56

        Sierra 18-0518 Valve Stem Seal for Mercruiser, OMC, Volvo For most inline 4 and 6 cylinder GM (Early) and 305-350 CID GM Engines. O.D.: 0.394" Shaft Size: 0.282" Width: 0.083" Interchangeable with: Johnson/Evinrude...

        Add to Cart
      • Sierra 18-3879 Head Gasket Replaces 27-879150140
        List Price: $42.52
        Starting At: $29.77

        Sierra 18-3879 Head Gasket Sierra replacement head gasket for Mercruiser Stern Drives, OMC Stern Drives, and Volvo Penta engines. Fits: GM 262 (4.3L) CID Engines Interchangeable with: Crusader 33408 GLM 36100 Johnson/Evinrude...

        Add to Cart
      • Sierra 18-0164 Thermostat Housing Gasket Replaces 27-814680
        List Price: $1.82
        Starting At: $1.38

        Thermostat Housing Gasket for 4 & 6 cylinder engines Replaces: OMC - 311069, 0508580 Mercury 27-814680  1 Volvo 3852096 Aqua Power 345 GLM 31340 Redline RL0164  

        Add to Cart
      • Sierra 18-0664 Valve Cover Gasket
        List Price: $25.51
        Starting At: $17.86

        Valve Cover Gasket for 5.0/5.7L GM Engines - Special Order est. 10 Days For GM 305/350, 5.0 & 5.7L Replaces: Crusader 7231330 Mallory 9-61305 Mercury 27-17467 OMC 3852687 Volvo 3852687 Aqua Power 1219 GLM 30357

        Add to Cart
      • Sierra 18-1213 Timing Cover Seal
        List Price: $29.66
        Starting At: $20.76

        Timing Cover Seal for most GM Based Engines - Special Order est. 10 Days Fits: 2.5L/153 CID 3.0L/181 CID I-6/230CID I-6/250CID 4.3L/V-6 5.0L/305 CID 5.7L/350 CID Replaces: Crusader 7080310 Mallory 9-61610 Mercury 59341A 1, 26-97335...

        Add to Cart
      • Sierra 18-4024 Valve Stem Seal
        List Price: $3.01
        Starting At: $2.28

        Sierra 18-4024 Intake Valve Stem Seal for 4.3L/5.0L/5.7L Sierra high-quality engine parts are designed to meet OEM specifications. For Mercruiser, OMC, and Volvo Penta applications. For: Chevy 4.3L/5.0L/5.7L Interchangeable...

        Add to Cart
      • Sierra 18-2673 Upper Unit Seal Kit Replaces 0987603
        List Price: $55.27
        Starting At: $38.69

        Sierra 18-2673 OMC Cobra Upper Unit Seal Kit Sierra replacement engine parts are designed to meet OEM specifications. For Use On All Cobras (1986-89). Interchangeable with: GLM 87654 Johnson/Evinrude Outboard 984459 986364 987603 OMC...

        Add to Cart
      • Sierra 18-1237 Oil Pan Gasket Replaces 27-13865
        List Price: $46.11
        Starting At: $32.28

        Sierra 18-1237 Oil Pan Gasket for 265 - 400 hp Sierra replacement oil pan gasket for Mercruiser Stern Drives, OMC Stern Drives and Volvo Penta engines. Fits MCM/MIE GM V-8 (305, 350 & 377 cid) engines w/ 1 pc. RM seal (1985 &...

        Add to Cart

      OMC Sterndrive Gaskets and Seals are here and in stock.