Description
The Yanmar 119578-42750 is a genuine OEM raw water pump impeller kit for Yanmar 6LY3 series marine diesel engines.
Why it matters
The raw water impeller is the most common cause of an overheating alarm on a marine diesel, and it is a wear part by design. Replace it on schedule rather than running it to destruction.
Fitting
Never run the engine with the seacock shut.
Check your fitment
The engine models listed in the product specifications are a guide only. Always confirm against the parts catalogue for your engine’s model and serial number before ordering. If you are unsure, send us your engine plate details and we will check it for you.
Genuine Yanmar parts
We stock genuine Yanmar OEM parts, not pattern copies. If you need help identifying the right part for your engine, or want to book a service, get in touch.
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