Yanmar 104211-42080 End Cover for 2GM and 3GM
The Yanmar 104211-42080 is the factory end cover used in the sea water pump fitted to 2GM and 3GM Series engines. It is the part that comes off every time the impeller is changed, which is exactly why it is the part most often found distorted or corroded.
Whenever the cover comes off, renew its seal and tighten the screws evenly in a cross pattern rather than working round the circle. That single habit is what keeps a cover flat for years, and it costs nothing.
Key Features
- Genuine Yanmar replacement end cover
- Fits the sea water pump fitted to 2GM and 3GM Series engines
- One per pump
- Restores a flat sealing face for the impeller
- Replaces a distorted, pitted or corroded cover
- Renew the cover seal at the same time
Applications
- the sea water pump fitted to 2GM and 3GM Series engines
- Raw water pump rebuilds and impeller changes
- Curing air being drawn in at the cover joint
- Replacing a cover bowed by overtightening
- Repairing corrosion damage on a pump that has seen years of salt water
- Spring commissioning and layup service
Specifications
- Brand: Yanmar
- Manufacturer: Yanmar Marine
- Manufacturer Part Number: 104211-42080
- Part Type: End Cover
- Fits: The sea water pump fitted to 2GM and 3GM Series engines
- Quantity Used: One per pump
- Condition: New
Frequently Asked Questions
Q: Can a pitted cover face be cleaned up?
Light polishing is reasonable if it leaves the face flat. Anything that takes the face out of flat does more harm than the pitting did.
Q: Does the cover affect how much water the pump moves?
Directly. It is one of the two faces the impeller vanes seal against, so a pitted or bowed cover lets water slip back inside the pump instead of leaving the discharge.
Q: How do I tell if the cover is distorted?
Lay it on something known to be flat and look for daylight under the edges, particularly between the screw holes. A bowed cover will not seal and will not present a flat face to the impeller.
Q: My pump draws air rather than water. Could the cover be the cause?
It is one of the first places to look, along with the cover seal and the intake hose. Air drawn in at the cover joint gives a weak exhaust stream with a perfectly clear strainer.
Not sure this is the right part? Send us a Picture of the Pump Plate on your pump and the CLR Marine team will confirm the correct end cover.
CLRMarine
