Head Gasket Kit – Fits Yanmar 3JH4E & 3JH5 Marine Engines (Replaces 729271-92600)
Head Gasket Kit – Fits Yanmar 3JH4E & 3JH5 Marine Engines (Replaces 729271-92600) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Head Gasket Kit – Fits Yanmar 3JH4E & 3JH5 Marine Engines (Repl...
Product Details
This Head Gasket Kit provides all necessary components for cylinder head service on Yanmar 3JH4E, 3JH5, 3JH5E, and 3JH5AE series marine diesel engines. It is also noted as compatible with 3TNV88 & 3D88E marine applications.
It serves as a direct interchange for Yanmar part 729271-92600 and FridayParts FPCY2505219.
- Complete kit for cylinder head servicing.
- Designed for diesel fuel engines.
- Includes all essential gaskets, O-rings, and seals for installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yanmar | 729271-92600 |
| FridayParts | FPCY2505219 |
Engine & Model Compatibility
Confirm your engine model in the table below.
For Yanmar Engines: This kit is a direct fit for the 3JH4E and 3JH5 series. It is also listed as a compatible service kit for 3TNV88 and 3D88E industrial engines by select aftermarket suppliers.
| Brand | Model | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|
| Yanmar | 3JH4E | 4-Stroke | 729271-92600 | |
| Yanmar | 3JH5 | 4-Stroke | 729271-92600 | |
| Yanmar | 3JH5E | 4-Stroke | 729271-92600 | |
| Yanmar | 3JH5AE | 4-Stroke | 729271-92600 | |
| Yanmar | 3TNV88 | 4-Stroke | 729271-92600 | Listed as compatible by FridayParts |
| Yanmar | 3D88E | 4-Stroke | 729271-92600 | Listed as compatible by FridayParts |
Technical Specs
- Product Type
- Head Gasket Kit
- Installation
- Engine Cylinder Head Service
- Fuel Type
- Diesel
- Housing Material
- Various (Gaskets, O-rings, Seals)
- Dimensions
- 33.0 cm L x 19.5 cm W x 0.5 cm H
- Weight
- 1 kg (2.2 lbs)
- Other Technical Attributes
- Complete gasket set for cylinder head servicing
What’s in the Box
- 1 x GASKET SET (729271-92600)
- 1 x GASKET, HEAD (129001-01340)
- 4 x O-RING, P16 (119609-32040)
- 1 x O-RING (121850-51960)
- 2 x O-RING, 1AP32.0 (24311-000320)
- 1 x O-RING, 1AS24.0 (24341-000240)
- 4 x WASHER, SEAL 14 (22190-140002)
- 1 x GASKET, BONNET (129004-11310)
- 3 x O-RING, 1AP12.0 (24311-000120)
- 1 x GASKET, MANIFOLD (129150-12111)
- 1 x GASKET (129150-77511)
- 1 x GASKET (129472-18090)
- 1 x GASKET (129150-35042)
- 1 x GASKET (129150-35111)
- 3 x WASHER, SEAL 8 (22190-080002)
- 2 x WASHER, SEAL 10 (22190-100002)
- 2 x GASKET (129150-01881)
- 1 x GASKET, WATER PUMP (129486-42050)
- 1 x GASKET (129795-49551)
- 1 x GASKET, THERMOSTAT (129470-49810/129150-49811)
- 1 x GASKET, EXH.MANIFOLD (129150-13110)
- 8 x WASHER, SEAL 12 (22190-120002)
- 1 x GASKET, 8X1.0 (23414-080000)
Installation Notes
- Ensure the engine is completely cool and disconnect the battery. Drain the engine coolant and oil.
- Carefully disconnect all fuel lines, electrical connectors, and exhaust components attached to the cylinder head.
- Remove the valve cover, rocker arm assembly, and pushrods in sequence.
- Following the service manual, loosen the head bolts in the specified sequence and remove the cylinder head.
- Remove the old gasket and thoroughly clean both the cylinder head and engine block mating surfaces. Ensure they are free of debris, oil, and old gasket material.
- Position the new head gasket correctly on the engine block, ensuring proper alignment.
- Carefully place the cylinder head back onto the block.
- Install and torque the head bolts to the manufacturer's exact specifications in the correct sequence. This is critical for a proper seal.
- Reassemble the pushrods, rocker arm assembly, and valve cover.
- Reconnect all previously removed components (hoses, lines, connectors).
- Refill the engine with fresh oil and the correct type of coolant.
- Reconnect the battery, start the engine, and carefully check for any coolant, oil, or exhaust leaks.
Troubleshooting & FAQ
How do I know if this kit fits my engine?
This kit is designed for Yanmar 3JH4E, 3JH5, 3JH5E, and 3JH5AE series engines. It is also listed as compatible with 3TNV88 & 3D88E models by some suppliers. Critically, you must verify your engine model and confirm the OEM part number is 729271-92600 before purchasing.
What are the common signs of a failed head gasket?
Symptoms of a blown head gasket include engine overheating, white smoke from the exhaust (burning coolant), milky or foamy engine oil, loss of compression, bubbles in the radiator or coolant reservoir, and unexplained coolant loss.
Does this kit include everything for a complete engine rebuild?
No, this is a cylinder head gasket kit, not a full overhaul kit. It contains the specific gaskets, seals, and O-rings required for servicing the cylinder head only. Please review the "What’s in the Box" section for a complete list of included parts.
Should I replace the cylinder head bolts when using this kit?
While head bolts are not included, we strongly recommend consulting your engine's service manual. Many modern engines use torque-to-yield (TTY) bolts that stretch during installation and are single-use only. Reusing them can lead to improper sealing and gasket 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 and 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.
Payment & Security
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