OMC Internal Engine Parts

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      • Sierra 18-2945-9 Drain Screw Gasket (2Pk) Replaces 12-191833
        List Price: $2.78
        Starting At: $1.53

        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...

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      • Sierra 18-2613 Outdrive Gasket Set Replaces 0508105
        List Price: $7.99
        Starting At: $4.50

        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...

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      • Exhaust Manifold Gasket , Mercury - Mercruiser 27-33395
        List Price: $9.52
        Starting At: $7.93

        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

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      • Sierra 18-0549 Plug Off Cap Replaces 3852476
        List Price: $10.98
        Starting At: $7.84

        Sierra 18-0549 Plug Off Cap 1" I.D. Sierra high quality engine parts are designed to meet OEM specifications. For V8 Stern Drives and Inboards 1977 - present. Interchangeable with: GLM 22290 Johnson/Evinrude...

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      • Sierra 1525607 Aviation Gasket Sealant
        List Price: $14.99
        Starting At: $14.23

        Sierra 1525607 Loctite Aviation Gasket Sealant (Gasket Sealing Compound)A Slow Drying, Non-Hardening Brush Top Sealant,Gasoline,Oil,And Grease Resistant Key Features: Slow Drying Non hardening brush top sealant Gasoline, oil, and grease...

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      • Sierra 18-0347 Valve Cover Gasket Replaces 27-851040
        List Price: $11.99
        Starting At: $7.84

        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...

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      • Sierra 18-1402 Hydraulic Lifter Replaces 72638
        List Price: $8.99
        Starting At: $7.72

        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...

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      • Sierra 18-3876 Head Gasket Replaces 27-75611001
        List Price: $41.49
        Starting At: $28.99

        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...

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      • Sierra 18-7145 O-Ring Replaces 25-64068
        List Price: $1.49
        Starting At: $0.67

        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...

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      • Sierra 18-0182 Thermostat Gasket Replaces 27-62386001
        List Price: $1.99
        Starting At: $1.18

        Sierra 18-0182 Thermostat Gasket Thermostat Gasket for Johnson/Evinrude Outboards, Mercury engines, Mercury Race Outboards and Mercury Sport Jet engines. Interchangeable with: GLM 30610 Johnson/Evinrude...

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      • Sierra 18-0518 Valve Stem Seal Replaces 26-34217
        List Price: $1.99
        Starting At: $1.02

        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...

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      • Sierra 18-1308 Rod Bearing Replaces 23-85701
        List Price: $12.49
        Starting At: $7.67

        Sierra 18-1308 Standard Rod Bearing for Mercruiser Stern Drives Sierra high-quality engine parts are designed to meet OEM specifications. Standard size Interchangeable with: Mercruiser Stern...

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      • Sierra 18-3937 Piston Rings Replaces 0328506
        List Price: $32.99
        Starting At: $22.80

        Sierra 18-3937 Standard Piston Ring Set Sierra high-quality marine parts are engineered to meet OEM specifications. All pistons are supplied complete with piston rings and wrist pin. Standard size For us on Mercruiser Stern Drive, OMC Inboard, OMC...

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      • Sierra 18-0868 Intake Manifold Gasket Set Replaces 27-17145
        List Price: $25.99
        Starting At: $18.38

        Sierra 18-0868 Intake Manifold Gasket Set Sierra replacement intake manifold gasket set for OMC Stern Drives, Mercruiser Stern Drives, and Volvo Penta engines. For OMC 5.7L 1994, 1996-97 Fits MCM/MIE GM V-8 (305 & 350 cid) engines (1975 &...

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      • Sierra 18-4253-9 Drain Screw O-Ring (5Pk) Replaces 0336982
        List Price: $2.24
        Starting At: $1.46

        Drain Screw O-Ring (5 pk) for Johnson, Evinrude, OMC Used with Drain Screw 18-1236 and is a special order - est. 10 Days. Replaces: OMC - 336982 Mallory 9-76653 GLM 45290  

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      • Sierra 18-3879 Head Gasket Replaces 27-879150140
        List Price: $41.49
        Starting At: $26.45

        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...

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      • Sierra 18-2873 Water Jacket Gasket Replaces 0318335
        List Price: $3.99
        Starting At: $2.43

        Sierra 18-2873 Water Jacket Gasket for Johnson, Evinrude Outboards Sierra high-quality engine parts are designed to meet OEM specifications and are backed by Sierra's unmatched manufacturer's warranty. Interchangeable...

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      OMC Sterndrive Gaskets and Seals are here and in stock.