Oil Pan Gasket – Fits MerCruiser Volvo Penta 4.3L GM V6 (Replaces 27-142471, 142471, 2112485, 856402)

Product Details

This Oil Pan Gasket is engineered for MerCruiser and Volvo Penta 4.3L GM V6 marine engines, including MCM 262 Mag, 4.3L LX/LH/LHX Gen+ (1996 and up), as well as Indmar 4.3L V6 marine power applications. It provides a reliable seal between the oil pan and engine block to prevent leaks and maintain proper lubrication.

This aftermarket gasket directly replaces Mercury MerCruiser 27-142471, 142471, 14247T1, 27-14247T1, Sierra 18-61513, and Volvo Penta 2112485, 21124852, 3852655, 3855801, 856402.

• Drop-in replacement for OEM gasket assemblies
• Compatible with marine V6 engine configurations 1996 and newer
• Designed for oil pan sealing applications in saltwater and freshwater environments

Part Number Matrix

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

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Technical Specs

Engine Compatibility

4.3L GM V6 Marine

Application

Oil Pan Gasket Seal

Fitment Years

1996 and Up

OEM Reference

27-142471

What's in the Box

• 1 Marine Oil Pan Gasket Seal

Installation Notes

1. Drain all engine oil and remove the oil pan from the engine block.
2. Thoroughly clean both mating surfaces on the oil pan and engine block, removing all old gasket material and oil residue.
3. Inspect surfaces for warping, cracks, or damage that could compromise the seal.
4. Position the new gasket on the oil pan, aligning all bolt holes carefully.
5. Apply thread sealant to pan bolts if specified by your engine manual.
6. Reinstall the oil pan and hand-tighten all bolts in a crisscross pattern.
7. Torque bolts to manufacturer specifications using a torque wrench, working from the center outward.
8. Refill with the correct grade and quantity of marine engine oil.
9. Run the engine and inspect for leaks around the oil pan perimeter.

Troubleshooting & FAQ

How do I know if my oil pan gasket needs replacement?

Common signs include visible oil pooling beneath the engine, oil streaks along the oil pan seam, low oil level between changes, or burning oil smell during operation. Inspect the pan gasket area regularly during routine maintenance.

Will this gasket fit older MerCruiser 4.3L engines?

This gasket is designed for 1996 and newer GM V6 4.3L models. Pre-1996 engines may use different gasket designs or dimensions. Always verify your engine year and part number before ordering.

Do I need sealant with this gasket?

Refer to your engine service manual. Some installations require a thin bead of RTV silicone on specific areas, while others are installed dry. Over-application of sealant can cause leaks or blockages.

Can I reuse an oil pan gasket?

No. Oil pan gaskets are designed for single use. Once compressed, they cannot form a proper seal if removed and reinstalled. Always replace with a new gasket when servicing the oil pan.

What torque specification should I use for oil pan bolts?

Torque specifications vary by engine model. Consult your MerCruiser or Volvo Penta service manual for the correct value and tightening sequence. Typical range is 10–18 ft-lbs, applied in a crisscross pattern.

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.

Is this gasket compatible with both saltwater and freshwater engines?

Yes. The gasket material is suitable for all marine environments, including saltwater, freshwater, and brackish conditions, provided the engine is maintained according to manufacturer guidelines.

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 against 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

• Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
• Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
• Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.