Mercury Outboard Internal Engine Parts

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Parts Selection Guide

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      • Sierra 18-2016 Oil Seal Replaces 26-41953
        List Price: $10.99
        Starting At: $6.97

        Sierra 18-2016 Oil Seal for Mercury, and OMC Sierra high-quality engine parts are designed to meet OEM specifications. Shaft Size: 1.187" O.D. 1.875" Width 0.250" Interchangeable with: GLM 85010 Mallory 9-76100 Mercury...

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      • Sierra 18-2810 Block Cover Gasket Replaces 27-437772
        List Price: $14.49
        Starting At: $7.96

        Sierra 18-2810 Mercury 45-50 HP Block Cover Gasket Sierra high-quality engine parts are designed to meet OEM specifications. Interchangeable with: GLM 30260 Mercury Marine 27-437772 27-43777 27-437771 27-96483

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      • 18-7161
        List Price: $2.99
        Starting At: $1.66

        Sierra 18-7161 Lower End Cap O-Ring Sierra high-quality engine parts are designed to meet OEM specifications. I.D.: 3.250" Width: 0.070" Interchangeable with: GLM 80420 Mallory 9-76546 Mercruiser Stern...

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      • Sierra 18-2835 Powerhead Base Gasket Replaces 27-692381
        List Price: $8.49
        Starting At: $5.72

        Mercury Powerhead Base Gasket by Sierra For Use On Engine Models 52,90,115,140HP   Replaces: Mercury - 27-69238-1 Mallory - 9-60044 GLM - 31720 Pro Marine - 319 Redline - RL2835  

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      • Sierra 18-3966 Piston Rings
        List Price: $42.49
        Starting At: $21.27

        Sierra 18-3966 Mercury Piston Rings Sierra high-quality piston rings for Mercury Marine engines. Sierra engine parts are backed by Sierra's unmatched manufacturer's warranty. Bore Size: 2.565 / Standard Interchangeable...

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      • List Price: $37.49
        Starting At: $24.53

        Sierra 18-3982 Standard Piston Rings For Mercury Outboards Sierra high-quality engine parts are designed to meet OEM specifications. 18-3982 Piston Rings are for Mercury and Mariner Crossflow and Inline Outboard engines Bore Size: 3.500 /...

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      • Sierra 18-0359 Induction Silencer Cover Gasket
        List Price: $7.49
        Starting At: $6.39

        Sierra 18-0359 Induction Silencer Cover Gasket Sierra replacement induction silencer cover gasket for Mercury Marine engines. Interchangeable with: GLM 30740 Mercury Marine 27-672751 27-67275

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      • Sierra 18-3871 Head Gasket
        List Price: $49.99
        Starting At: $25.02

        Sierra 18-3871 Head Gasket For Mercury 175, VR4, Mag II Interchangeable with: GLM 35890 Mallory 9-63856 Mercury Marine 27-18786-1 27-18786T 27-187863

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      • Sierra 18-4356 Powerhead Gasket Set
        List Price: $103.99
        Starting At: $78.99

        Sierra 18-4356 Mercury Powerhead Gasket Set (Does Not Include Head Gaskets) Sierra high-quality engine parts are designed to meet OEM specifications. Interchangeable with: GLM 39550 Mallory 9-64213 Mercury...

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      • Sierra 18-0385 Powerhead Base Gasket Replaces 27-89937
        List Price: $3.49
        Starting At: $2.26

        Sierra 18-0385 Mercury Powerhead Base Gasket For most 4.5-9.8 HP Mercury Outboard Motors. Interchangeable with: GLM 32110 Mercury Marine 27-89937 27-31557 27-30803 27-45748 Mercury Race Outboard 27-89937

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      • Sierra 18-4317 Powerhead Gasket Set
        List Price: $207.99
        Starting At: $127.95

        Sierra 18-4317 Mercury Powerhead Gasket Set Sierra high-quality engine parts are designed to meet OEM specifications. Interchangeable with: GLM 39440 Mallory 9-64200 Mercury Marine 27-90484A88 27-90484A86 27-90484A32  Set...

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      • 25-32546
        List Price: $3.10
        Starting At: $2.95

        Lower End Cap O Ring , Mercury - Mercruiser 25-32546 Fits: 30, 40, 50, 60, 65, 70, 75, 80, 85, 90, 115, 140, 150 hp engines Replaces: GLM 80420 Mallory 9-76546 Sierra 18-7161

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      • Sierra 18-0515 Oil Seal
        List Price: $9.99
        Starting At: $6.09

        Oil Seal - Special Order est. 10 Days

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      • Sierra 18-0879 Adapter Plate Gasket
        List Price: $7.49
        Starting At: $4.49

        Sierra 18-0879 Adapter Plate Gasket Sierra replacement adapter plate gasket for use on Mercury/Mariner Outboard Engines. Interchangeable with: GLM 31400 Mallory 9-60042 Mercury Marine 27-385011 27-38501 27-37724

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      • Sierra 18-3922 Piston Rings
        List Price: $45.49
        Starting At: $22.93

        Sierra 18-3922 Piston Rings Sierra high-quality engine parts are designed to meet OEM specifications. Bore Size: 3.125 / .015 Interchangeable with: GLM 14250 Mercury Marine 39-78918A4 Wiseco 3145KD

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      • Sierra 18-3872 Head Gasket
        List Price: $54.99
        Starting At: $33.97

        Sierra 18-3872 Head Gasket For Mercury 200 & 225 Hp Interchangeable with: GLM 35900 Mallory 9-63852 Mercury Marine 27-41245-1 27-41244T02 27-41245 27-41244 27-77671 27-96541 27-90279 27-412452

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      • Sierra 18-3902 Piston Rings
        List Price: $37.49
        Starting At: $25.99

        Sierra 18-3902 Mercury Piston Rings Sierra high-quality marine parts are designed to meet OEM specifications. Bore Size: 2.875 / STD For 3 ring pistons Interchangeable with: Mallory 9-54217 Mercury Marine 39-78816A12 39-45155A12

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      • List Price: $4.49
        Starting At: $2.40

        Sierra 18-7167 O-Ring Sierra high-quality engine parts are designed to meet OEM specifications. For use on Chrysler/Force/US Marine, Johnson/Evinrude Outboards, Mercruiser Stern Drives, Mercury Marine, and OMC Stern Drive engines. I.D.: 3...

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      Mercury Outboard Powerhead parts for lower boat engines.