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Mercruiser Internal Engine Parts

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Parts Selection Guide

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      • Magnetic Oil Plug Drain Kit Bottom, Mercury - Mercruiser 22-8M0058389
        List Price: $10.49
        Starting At: $6.99

        Magnetic Oil Plug Drain Kit Bottom, Mercury - Mercruiser 22-8M0058389 All MC-1, Alpha 1, Gen II, TR & TRS Replaces: Mercury 22-67892A06 GLM 21731 Mallory 9-72651 Redline RL2375 Pro Marine 64892 Sierra 18-2375

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      • Restrictor Elbow Gasket, Mercury - Mercruiser 27-863724
        List Price: $16.49
        Starting At: $10.14

        Restrictor Elbow Gasket, Mercury - Mercruiser 27-863724 Fits Center Riser manifolds. Commonly used on all raw water cooled engines. Creates back pressure by restricting the water flow, keeping the manifold full. For: 185, 205, 229 & 262 CID V-6...

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      • 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

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      • Sierra 18-2946 Head Gasket Replaces 27-52364
        List Price: $30.49
        Starting At: $21.49

        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 ...

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      • Sierra 18-1402 Hydraulic Lifter Replaces 72638
        List Price: $11.99
        Starting At: $8.99

        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 18-2094 Oil Seal Replaces 26-88416
        List Price: $20.49
        Starting At: $14.49

        Sierra 18-2094 Oil Seal for Mercruiser Stern Drives Sierra engine parts are designed to meet OEM specifications. Fits: 120/140 (1978-82) 165 (1978-81) 260 (1978-82) 485 (1980-82) 898/228 (1978-82) Alpha One/Gen II (1991 & Up) BravoI/II/III...

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      • Sierra 18-7145 O-Ring Replaces 25-64068
        List Price: $0.98
        Starting At: $0.75

        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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      • 27-33179-2
        List Price: $2.99
        Starting At: $1.99

        Thermostat Housing Gasket, Mercury - Mercruiser 27-33179-2 Fits MCM/MIE GM 4 Cylinder, V-6, and V-8 engines. For thermostat housing with flat cover plate Replaces: Mercury 27-53045, 27-53045...

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      • 27-98823-1
        List Price: $2.99
        Starting At: $1.99

        Power Trim Hose Connection Gasket, Mercury - Mercruiser 27-98823-1 For Mercruiser Alpha Stern Drives 1983-present and all Bravo Drives. Replaces: GLM 32500 Redline RL0388 Sterndrive 9F-116-18 Sierra 18-0388

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      • Sierra 18-0518 Valve Stem Seal Replaces 26-34217
        List Price: $3.99
        Starting At: $2.99

        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 18-0905 Oil Pan Drain Plug Gasket Replaces 27-49955
        List Price: $2.99
        Starting At: $1.99

        Sierra 18-0905 Oil Pan Drain Plug Gasket Sierra high-quality engine parts are designed to meet OEM specifications. For Mercruiser and Chrysler/Force/US Marine engines. Interchangeable with: Chrysler/Force/US...

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      • Sierra 18-1308 Rod Bearing Replaces 23-85701
        List Price: $11.49
        Starting At: $8.99

        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: $33.49
        Starting At: $23.49

        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 18-0164 Thermostat Housing Gasket Replaces 27-814680
        List Price: $1.99
        Starting At: $1.49

        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  

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      • Sierra 18-0664 Valve Cover Gasket
        List Price: $25.99
        Starting At: $17.99

        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

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      • Sierra 18-1213 Timing Cover Seal
        List Price: $29.99
        Starting At: $20.99

        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...

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      • Sierra 18-4024 Valve Stem Seal
        List Price: $2.99
        Starting At: $2.49

        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...

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      • Sierra Marine Distributor Gasket - 18-0874
        Starting At: $1.49

        Sierra 18-0874 Distributor Gasket for GM V6 & V8 Sierra Distributor Gasket for GM V6 and V8 engines.  Fits: 2.6L (1989) 3.5L (1989) 4.3L (1987-93) 5.0L (1987-88) 5.7L (1987-92) 7.4L (1988-93) 8...

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      Mercruiser Gaskets & Seals

      When your Mercruiser outboard needs an overhaul, it can be costly and time consuming. Sometimes the culprit is a blown gasket or seal. These are among the least expensive engine components, yet when compromised, can cause significant damage. Wholesale Marine has compiled a troubleshooting list so that a little routine maintenance can prevent expensive repairs and more carefree voyages and fishing trips!

      The best times to examine your outboard are prior to winter storage and when prepping your boat for the new season. If you do not elect to perform this meticulous work yourself, at least you can know what the process involves and be better aware of the function of various outboard components.

      Check for Leaking Mercruiser Gaskets

      A loss of air compression is usually a sign that the outboard has a cracked or leaking gasket. This must be attended to immediately and not with a bandaid fix to avoid a piston seizure or worse. Here’s why: the normal vacuum in the engine’s lower end draws a fuel/air mixture from the carburetor. It’s sealed off and moved through the transfer ports to the cylinder. A leaky or lean air mixture usually results in a seized piston. To troubleshoot, perform a pressure test.

      1)    Using a plug or rubber gasket, seal off the intake manifold.

      2)    Plug the exhaust port as well.

      3)    Attach an air fitting through the inlet plug or spark plug hole to pressurize the motor.

      4)    Pressurize the motor to 6-9 psi using a hose with an in-line gauge. Do not exceed 9 psi.

      5)    Watch the gauge for 10 minute to confirm that there is no loss of pressure. Pressure loss of any kind is unacceptable.

      6)    If pressure loss is indicated, spray the gasket with WD-40 which creates bubbles. It will also create a leaking sound.

      7)    Replace the leaking gasket. Wholesale Marine has Mercruiser gaskets and gasket kits for every Mercruiser outboard. Use our convenient parts finder to locate the right gaskets for your outboard.

      8)    Other sources of air leaks may be bolt holes and any casting anomalies. Check these as well and replace fitting as necessary.

      If you have boating questions call us for answers! Wholesale Marine’s knowledgeable staff of watercraft enthusiasts will be glad to help. We offer a lowest price guarantee as well as flat rate shipping for $6.99. Join our Loyalty Program and you’ll be able to use the points you accumulate today towards any future purchases. Just give us a call Monday through Friday from 9:00 AM until 6:00 PM EST at (877) 388-2628.