Yanmar Zinc Engine Anode 119574-18790-01

Yanmar 119574-18790-01 is a zinc pencil-style engine anode used in select Yanmar marine diesel applications. Public listings consistently identify this part with the 119574-18790 family and describe it as a sacrificial zinc anode intended to help protect internal engine cooling components from corrosion. Based on the available listings, this part is commonly associated with intercooler / heat-exchanger style anode service on certain Yanmar engines.

Key Features

• Genuine-style Yanmar zinc engine anode in the 119574-18790 part family
• Sacrificial zinc construction for corrosion protection in raw-water-cooled internal passages
• Commonly described as a pencil anode / engine anode configuration
• Common published dimensions for the 119574-18790 version are approximately 1/2″ NPT thread, 2″ length, 5/8″ diameter
• Wrench size commonly listed as 7/8″

Engine Compatibility
Public fitment listings commonly associate this anode with Yanmar 4LH / 4LHA, 6LP / 6LPA, and 6LY marine diesel engines, with some listings also extending fitment to certain 8LV applications. Because published fitment is not perfectly consistent across sellers, this should be treated as a serial-number-confirmed service part, not a universal fit across every variant in those engine families.

Serial Number Fitment Notice
Please confirm fitment by engine model and serial number before ordering. Yanmar notes that identification and parts confirmation should be done using the complete model number and serial number, which is especially important here because online listings show some variation in exact engine coverage.

When This Part Needs Replacement
Replace this anode when it is heavily consumed, reduced in size, brittle, or no longer able to provide effective sacrificial protection. Engine anodes are maintenance items and should also be inspected whenever the cooling system service schedule calls for anode inspection or replacement. This replacement guidance is an inference from the parts function as a sacrificial zinc engine anode.

Installation Notes
Install only in the correct anode port for the applicable Yanmar engine or cooler assembly, and verify thread size before installation. Because public listings identify this part as a 1/2″ NPT pencil anode used in specific cooling-component locations, matching the old anode by part number, dimensions, and engine serial number is the safest approach.

Alternate / Superseded Part Numbers

• 119574-18790
• Aftermarket cross-reference commonly seen: Tecnoseal 01317

Parts Desk Insight
This is the kind of part where the engine family alone is not enough. The public listings are strong on the 119574-18790 family, but they vary slightly on exact model coverage, especially around later 6LY and 8LV references. For Marisol Marine customers, the best practice is to confirm by serial number and removed anode dimensions before ordering.

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