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guidebook

Parts Selection Guide

Find the parts you need

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Prop Selection Guide

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Mercruiser Head Gaskets

Mercruiser Valve Cover Gaskets

Mercruiser Crankshaft Seals

Mercruiser Engine Gasket Sets

Mercruiser Cylinder Heads

Mercruiser Oil Pans

Mercruiser Oil Pan Gaskets

Mercruiser Main & Rod Bearings

Mercruiser Pistons & Rings

Mercruiser Hydraulic Lifters

Mercruiser 3.7L Parts & Gaskets

      Mercruiser Internal Engine Parts

      • Sierra 18-4386 Overhaul Gasket Set
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        Sierra 18-4386 Overhaul Gasket Set

        $347.49
        $243.49

        Sierra 18-4386 Overhaul Gasket Set Sierra high-quality engine parts are designed to meet OEM specifications. This Gasket Set is for GM 305 & 350 (5.0L & 5.7L) CID engines with heads (1987 and earlier). Interchangeable...

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      • Sierra 18-4392 Intake Manifold Gasket Set
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        Sierra 18-4392 Intake Manifold Gasket Set

        $311.99
        $218.49

        Sierra 18-4392 Mercruiser Intake Manifold Gasket Set Sierra high-quality engine parts are designed to meet OEM specifications. Fits MCM/MIE GM V-8 (305 & 350 CID) engines (1986 & older) Set Includes: (10) 18-0518 Valve Stern Seal (1)...

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      • Sierra 18-1254 Head Gasket Set
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        Sierra 18-1254 Head Gasket Set

        $205.99
        $143.99

        Sierra 18-1254 Mercruiser Head Gasket Set Sierra 18-1254 replacement Mercruiser Head Gasket Set for small block GM V8 engines with Vortec heads.  Fits MCM/MIE GM V-8 (305, 350 & 377 cid) Gen + engines (1996 & Newer). Interchangeable...

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      • Sierra 18-3880 Head Gasket
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        Sierra 18-3880 Head Gasket

        $70.49
        $49.49

        Sierra 18-3880 Head Gasket Sierra replacement head gasket for GM 153 (2.5L), (3.0L) CID Engines. Sierra marine aftermarket parts are manufactured to meet or exceed OEM requirements. For GM 153 (2.5L), (3.0L) CID Eng...

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      • Sierra 18-1327 Rod Bearing
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        Sierra 18-1327 Rod Bearing

        $19.99
        $11.99

        Sierra 18-1327 Rod Bearing Sierra replacement rod bearing for Mercruiser Stern Drives. Sierra replacement engine components are manufactured to meet or exceed OEM requirements. Size: Standard Interchangeable with: Mercruiser Stern...

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      • Mercruiser 26-807006 J-Joint Seal
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        Quicksilver 26-807006 J-Joint Seal

        $31.19
        $25.99

        Mercruiser 26-807006 J-Joint Seal Genuine Mercury - Mercruiser part. Application: Bravo I (1988 - 2021) s/n 0B664190 and up Bravo I X (2000 - 2021) s/n 0M100001 and up Bravo I XR/XZ (2000 - 2021) s/n 0M100001 and up Bravo II (1988 - 2021) s/n...

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      • Sierra 18-1400 Hydraulic Lifter
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        Sierra 18-1400 Hydraulic Lifter

        $23.99
        $16.99

        Hydraulic Lifter for GM 4.3L and Late 5.0/5.7L - Special Order est. 10 Days GM 4.3L/V-6 Late/5.0L/5.7L Replaces: Mercury 17340T OMC 3856127 Volvo 3856127 Redline RL1400

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      • Sierra 18-0411 Oil Pan Gasket Set
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        Sierra 18-0411 Oil Pan Gasket Set

        $41.49
        $31.49

        Oil Pan Gasket Set - Special Order est. 10 Days Replaces: Mercury 27-90458A 1 OMC 0357159, 0458625, 0508876 Aqua Power 738, 1087 Felpro 17981 Redline RL0411, RL0153

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      • Sierra 18-0519 One Piece Rear Main Seal
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        Sierra 18-0519 One Piece Rear Main Seal

        $36.99
        $27.99

        One Piece Rear Main Seal for Mercruiser, OMC, Volvo - Special Order est. 10 Days Replaces: Crusader 7070400 Mallory 9-61621 Mercury 26-14240 OMC 3852657, 0509394 Volvo 3852657 GLM 85790 Redline RL0519

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      • Sierra 18-0891 Water Pump Mounting Gasket
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        Sierra 18-0891 Water Pump Mounting Gasket

        $0.61
        $0.49

        Sierra 18-0891 Water Circulating Pump Mounting Gasket for GM Engines Sierra high-quality water circulating pump mounting gasket for GM V-6 & V-8 (305, 350 & 377 cid) engines. Interchangeable with: Chris-Craft 16...

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      • Sierra 18-4383 Overhaul Gasket Set
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        Sierra 18-4383 Overhaul Gasket Set

        $229.49
        $160.99

        Sierra 18-4383 Mercruiser Overhaul Gasket Set Sierra high-quality engine parts are designed to meet OEM specifications. For use with GM 153 (2.5L) CID Engines s/n 2324347 & Up. Use with 18-3880 Head Gasket Interchangeable...

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      • Sierra 18-0887 Timing Cover Gasket
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        Sierra 18-0887 Timing Cover Gasket

        $5.99
        $3.99

        Sierra 18-0887 Timing Cover Gasket Sierra replacement timing cover gasket for 4 & 6 cylinder engines. Fits MCM 120/2.5L, 140/3.0L/LX & 160/165 (6 cylinder) (1963 & up) Interchangeable...

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      • Sierra 18-3877 Head Gasket
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        Sierra 18-3877 Head Gasket

        $68.99
        $48.49

        Sierra 18-3877 Head Gasket for 7.4L Mercruiser, OMC, Volvo Sierra high-quality engine parts are designed to meet OEM specifications. For Mercruiser and OMC Stern Drives. Fits MCM/MIE GM V-8 (427, 454 & 482 cid) engines...

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      Mercruiser OEM Engine Parts Finder

      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 band aid 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.