Rear Main Seal Retainer Gasket – Fits Mercruiser/Volvo/OMC V6 & V8 Engines (Replaces 27-14241, 27-881715)

$12.99

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Product Details

This Rear Main Seal Retainer Gasket is designed for a range of Mercruiser, OMC, and Volvo Penta V6 4.3L and V8 5.0L, 5.7L, and 6.2L engines, primarily from model years 1994 to 1998. It provides a reliable seal for the rear crankshaft retainer cover, preventing oil leaks at a critical engine juncture.

This component is a direct replacement for Mercury part numbers 27-14241 and 27-881715, Volvo Penta 3852656, and GLM 30354, ensuring broad interchange compatibility.

Direct-fit installation requires no modification.
Engineered to seal the rear main seal housing/retainer.
Constructed from high-quality composite gasket material for durability.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number	Superseded By
Mercury	27-14241	27-881715
Mercury	27-881715
Volvo Penta	3852656
GLM	30354

Engine & Model Compatibility

Confirm your engine model/year in the table below.

For Mercruiser models, check your engine's serial number (s/n) range to ensure a precise match.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.
Mercruiser	4.3L	Various	4-Stroke	s/n 0L010044–0M614999	27-14241/27-881715
Mercruiser	5.0L	Various	4-Stroke	s/n 0L331631–0M299999	27-14241/27-881715
Mercruiser	5.0L	Various	4-Stroke	s/n 0W310000–0W649999	27-14241/27-881715
Mercruiser	5.7L	Various	4-Stroke	s/n 0K040300–0K261160	27-14241/27-881715
Mercruiser	5.7L	Various	4-Stroke	s/n 0L325977–0M299999	27-14241/27-881715
Mercruiser	6.2L	Various	4-Stroke	s/n 0L302200–0W689999	27-14241/27-881715

Fits various OMC 4-stroke engines manufactured between 1994 and 1998.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.
OMC	302	Various	4-Stroke	1994–1998	27-14241/27-881715
OMC	432	Various	4-Stroke	1994–1998	27-14241/27-881715
OMC	434	Various	4-Stroke	1996–1998	27-14241/27-881715
OMC	502	Various	4-Stroke	1998	27-14241/27-881715
OMC	572	Various	4-Stroke	1994–1998	27-14241/27-881715

Compatible with various GM-based Volvo Penta engines that utilize the specified OEM part number.

Brand	Model	Stroke	OEM Part No.
Volvo Penta	Various GM-based engines	4-Stroke	3852656

Technical Specs

Product Type: Rear Crankshaft Retainer Cover Gasket
Application: For rear main seal housing/retainer
Installation: Direct fit
Housing Material: Gasket Material (Paper/Composite)
Product Dimensions: 11.0" H x 6.0" W x 0.13" L

What’s in the Box

1 x Gasket (Replaces 27-14241, 27-881715, 3852656)

Installation Notes

Disconnect the negative battery terminal and ensure the engine is completely cool.
Gain access to the rear of the engine, which typically requires removing the outdrive, bell housing, and flywheel.
Carefully unbolt and remove the rear main seal retainer housing. Note the bolt positions if they vary in length.
Remove the old gasket, ensuring both the engine block and retainer housing surfaces are perfectly clean and free of any old gasket material, oil, or sealant.
Position the new gasket onto the clean retainer housing. Do not use sealant unless explicitly required by your engine's service manual.
Reinstall the retainer housing, tightening bolts to the manufacturer's specified torque in the correct sequence to ensure even pressure.
Reassemble the flywheel, bell housing, outdrive, and any other components that were removed.
Reconnect the battery, start the engine, and carefully inspect for any oil leaks around the bell housing area before returning to service.

Troubleshooting & FAQ

How do I know if this gasket fits my engine?

This gasket is designed for specific Mercruiser, Volvo Penta, and OMC V6/V8 models from 1994–1998. Please check the compatibility tables and cross-reference your engine's serial number (for Mercruiser) or model year to confirm fitment. Always compare the product images to your old part before ordering.

What are the signs of a failing rear main seal retainer gasket?

Common symptoms include an oil leak from the area where the engine meets the transmission (the bell housing), a noticeable drop in oil level, or oil spots under the boat. A visual inspection may reveal fresh oil residue and grime around the retainer housing.

Do I need to use sealant with this gasket?

Generally, this type of composite gasket is designed to be installed dry. However, always consult your engine's specific service manual. Some applications may recommend a very thin bead of sealant at the corners or sharp bends, but over-application can cause the gasket to slip and fail.

Is this the same as a rear main seal?

No. This is the gasket that seals the metal housing (retainer) that holds the rear main seal. The rear main seal itself is a separate circular seal that fits inside this housing. If you are replacing the seal, it is critical to also replace this gasket.

My engine model isn't listed, but the part number matches. Can I use it?

If your existing part has a number that cross-references to 27-14241, 27-881715, or 3852656, it is likely compatible. However, we strongly recommend using it only for the engine models explicitly listed in our compatibility chart to guarantee proper sealing and performance.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.

Shipping speed & cost

We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.

Warranty & returns

Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.

Safety & Important Info

Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
This is an aftermarket replacement, not an OEM component.
Professional installation is recommended for safety and performance.

About Sea Sierra

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