Oil Pan Sump Gasket – Fits Mercruiser 4.3L (Replaces REC17971, 27-883964T)
Oil Pan Sump Gasket – Fits Mercruiser 4.3L (Replaces REC17971, 27-883964T) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
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Oil Pan Sump Gasket – Fits Mercruiser 4.3L (Replaces REC17971, 27-883964T) is backordered and will ship as soon as it is back in stock.
Product Details
This replacement Oil Pan Sump Gasket is designed for Mercruiser 4.3L engines (150, 160, 175, 180 & 205 HP) and Volvo Penta 4.3Gi, 4.3GL, and 4.3GS models. It ensures a reliable seal for the engine's oil pan, preventing leaks and maintaining optimal performance.
This part serves as a direct interchange for multiple OEM and aftermarket part numbers, including REC17971, 27-883964T, and 3852655.
- Engineered for direct, hassle-free installation.
- Compatible with GM 262 CID (4.3L) marine engines.
- Provides a durable, long-lasting seal against oil leaks.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| RecMar | REC17971 |
| Sierra | 18-0405 |
| Mercury | 27-883964T |
| Mercruiser | 27-883964 |
| Mercruiser | 27-14247 |
| Volvo Penta | 3852655 |
| FP | FP-17971 |
| GLM | 39840 |
| Mallory Marine | 9-61505 |
| Pro Marine | 118-0405 |
| General Motors | 912955 GM |
| Crusader | 856402 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This gasket fits various 4.3L engines under the Mercruiser brand, from 150 HP to 205 HP.
It is also compatible with specific Volvo Penta 4.3L sterndrive models including the Gi, GL, and GS series.
| Brand | Model | Rated HP | OEM Part No. |
|---|---|---|---|
| Mercruiser | 4.3L | 150 | 27-883964T |
| Mercruiser | 4.3L | 160 | 27-883964T |
| Mercruiser | 4.3L | 175 | 27-883964T |
| Mercruiser | 4.3L | 180 | 27-883964T |
| Mercruiser | 4.3L | 205 | 27-883964T |
| Volvo Penta | 4.3Gi | 3852655 | |
| Volvo Penta | 4.3GL | 3852655 | |
| Volvo Penta | 4.3GS | 3852655 |
Technical Specs
- Product Type
- Oil Pan Sump Gasket
- Installation
- Direct replacement
- Compatible Engine
- GM 262 CID (4.3L)
- Dimensions
- Length: 63.0 cm, Width: 28.0 cm, Height: 9.0 cm
- Weight
- Approx. 0.44 kg
- Warranty
- 1 Year
What’s in the Box
- 1 x Oil Pan Sump Gasket (REC17971/27-883964T)
Installation Notes
- Ensure the engine is cool and disconnected from the power source. Drain the engine oil completely.
- Carefully remove the bolts securing the oil pan to the engine block.
- Lower the oil pan and remove the old gasket. Thoroughly clean both the pan and the engine block mating surfaces, removing all old gasket material and residue.
- Position the new gasket on the oil pan. Ensure it is correctly aligned with the bolt holes.
- Raise the oil pan back into position and start all bolts by hand to prevent cross-threading.
- Tighten the bolts in the manufacturer-specified sequence and to the correct torque value.
- Refill the engine with the correct type and amount of oil. Start the engine and check for leaks around the oil pan.
Troubleshooting & FAQ
How do I know if this gasket will fit my engine?
This gasket is designed for Mercruiser 4.3L (150-205 HP) and Volvo Penta 4.3Gi, 4.3GL, and 4.3GS models. The most reliable way to confirm fitment is to match your existing part number to one of the cross-reference numbers listed in the Part Number Matrix.
What are the signs of a failing oil pan gasket?
Common signs include visible oil leaks or drips under the engine, a lower-than-normal oil level on the dipstick, and oily residue or grime collecting on the bottom of the engine block and oil pan.
Is any sealant required for installation?
This is a one-piece gasket and typically does not require sealant. However, always consult your engine's service manual. Some applications may recommend a small amount of RTV sealant at the corners where the timing cover meets the block.
What is the main cause of oil pan gasket failure?
Gaskets degrade over time due to constant exposure to heat, oil, and pressure changes. Overtightening bolts during installation can also crush the gasket and cause premature failure.
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
- 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.
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