27-142471 Oil Pan Gasket for MerCruiser Volvo Penta Indmar 4.3L GM V6 | JLM Marine

27-142471 Oil Pan Gasket for MerCruiser, Volvo Penta & Indmar 4.3L GM V6 Marine Engines

This oil pan gasket is engineered to fit MerCruiser, Volvo Penta, and Indmar 4.3L GM V6 marine engines manufactured from 1996 and up. It provides a reliable seal between the oil pan and engine block, preventing oil leaks and maintaining proper lubrication system performance in your marine powerplant.

This gasket serves as a direct replacement for Mercury MerCruiser part numbers 142471, 14247T1, 27-142471, and 27-14247T1; Volvo Penta part numbers 2112485, 21124852, 3852655, 3855801, and 856402; and Sierra aftermarket number 18-61513. It is specifically designed for the 4.3L GM V6 platform used across multiple marine engine brands.

• Fits MerCruiser MCM 262 Mag, 4.3L LX/LH/LHX Gen+ (1996 & up) and all GM V6 engines (1996 & up)
• Compatible with Volvo Penta 4.3L V6 and Indmar 4.3L V6 Marine Power engines
• Includes one complete marine-grade oil pan gasket seal

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

Your purchase includes:

• 1 × Marine Oil Pan Gasket Seal

Installation Guide

1. Drain the engine oil completely and dispose of it properly. Position a drain pan beneath the oil pan to catch any residual oil.
2. Remove the oil pan mounting bolts in a crisscross pattern, working from the outer edges inward. Carefully lower the oil pan away from the engine block.
3. Thoroughly clean all old gasket material from both the oil pan and engine block mating surfaces using a gasket scraper and solvent. Ensure surfaces are completely free of debris, oil residue, and old sealant.
4. Inspect the oil pan for cracks, warping, or damage; replace if necessary. Check the mounting bolt threads and replace any damaged fasteners.
5. Position the new oil pan gasket onto the oil pan, aligning all bolt holes carefully. Some gaskets may have adhesive backing or may require a thin bead of gasket sealant—follow manufacturer recommendations.
6. Carefully raise the oil pan with the new gasket into position against the engine block. Ensure the gasket remains properly aligned and does not shift during installation.
7. Hand-thread all oil pan mounting bolts to prevent cross-threading. Do not fully tighten any bolts at this stage.
8. Torque the oil pan bolts to manufacturer specifications in a crisscross pattern, starting from the center and working outward. Typical torque is 10–12 ft-lbs, but always verify with your engine's service manual.
9. Reinstall the oil drain plug with a new crush washer if applicable, torquing to specification. Double-check that the drain plug is secure.
10. Refill the engine with the correct type and quantity of marine engine oil as specified in your owner's manual. Replace the oil filter if maintenance is due.
11. Start the engine and allow it to run at idle for 2–3 minutes. Monitor the oil pan area closely for any signs of leakage.
12. Shut off the engine, wait 5 minutes, then check the oil level and top off if necessary. Inspect the gasket seal one final time before returning the vessel to service.

Troubleshooting & FAQ

Q: How do I confirm this oil pan gasket fits my specific engine?
A: Cross-reference your engine's model and year with the compatibility table above. Verify your current OEM part number matches one of the listed MerCruiser, Volvo Penta, or Sierra numbers. If your engine is a 4.3L GM V6 from 1996 or later in the MerCruiser, Volvo Penta, or Indmar lineup, this gasket is the correct fit.

Q: What are the signs that my oil pan gasket needs replacement?
A: Common symptoms include visible oil pooling beneath the engine, oil drips or streaks along the oil pan exterior, low oil level between changes, or a burning oil smell during operation. If you notice any of these signs, inspect the gasket and replace it promptly to prevent engine damage.

Q: How often should I replace the oil pan gasket?
A: Oil pan gaskets do not have a fixed replacement interval; they should be replaced when leaking or during major lower-end engine work. Inspect the gasket annually or whenever the oil pan is removed for maintenance, and replace it if you observe any compression set, cracking, or hardening.

Q: Can I reuse the old gasket if it looks intact?
A: No, gaskets are designed for single use. Once compressed, the gasket material conforms to minor surface imperfections and cannot provide a reliable seal if reinstalled. Always use a new gasket when reassembling the oil pan to avoid leaks.

Q: Do I need to use additional sealant with this gasket?
A: Consult your engine's service manual for specific recommendations. Some applications require a thin bead of RTV sealant at the corners or block-to-timing-cover junctions, while others use the gasket dry. Follow OEM assembly procedures for best results.

Q: Is this an OEM gasket or an aftermarket replacement?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.