Water Pump Gasket – Fits Yanmar 3TNV Series Engines (Replaces 119717-42020)

Product Details

This replacement Water Pump Gasket ensures a reliable seal for Yanmar industrial and marine engines. It is designed for a precise fit on 3TNV series models including the 3TNV76, 3TNV76-CSA3, and 3TNV80F, as well as a wide range of marine engines from the 1GM through 6LY series.

This part is a direct replacement for Yanmar part number 119717-42020 and Granit 38034069.

• Installs directly between the water pump and the engine block.
• Engineered for both industrial and marine 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.

This gasket fits a comprehensive range of Yanmar industrial and marine diesel engines. Please verify your specific model is listed.

Technical Specs

Product Type

Water Pump Gasket

Installation

Direct fit between water pump and engine block

Dimensions

15.0 cm L x 13.0 cm W x 0.1 cm H

Weight

0.0396 kg (0.087 lb)

OEM Applications

Industrial engines and marine applications

Warranty

Manufacturer warranty for defects

What’s in the Box

• 1 x GASKET, WATER PUMP (119717-42020)

Installation Notes

1. Ensure the engine is off and cool. Disconnect the battery and drain the cooling system.
2. Remove the old water pump, and carefully clean both the engine block and water pump mating surfaces. Remove all old gasket material and residue.
3. Place the new gasket onto the engine block, aligning it with the mounting holes. No sealant is typically required, but check your service manual.
4. Carefully reinstall the water pump over the new gasket.
5. Tighten the mounting bolts in a crisscross pattern to the manufacturer's specified torque to ensure an even seal.
6. Refill the cooling system, reconnect the battery, and check for leaks after starting the engine.

Troubleshooting & FAQ

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.