Yanmar 129670-42610 Impeller Kit for 3JH and 4JH
The Yanmar 129670-42610 is the genuine impeller kit for 3JH and 4JH Series engines. It brings the impeller together with the small parts that should be renewed with it, so the pump goes back together with nothing left over from the last service.
Keep one aboard. An impeller change is a twenty minute job alongside the dock and a miserable one at sea, and the kit is small enough to live in the spares box permanently. Boats that carry a spare kit tend to change the impeller on schedule; boats that do not tend to change it after the alarm.
Key Features
- Genuine Yanmar impeller kit
- Fits 3JH and 4JH Series engines
- Impeller supplied with the parts renewed alongside it
- Restores raw water flow and cooling capacity
- One per pump
- Compact enough to keep aboard as a spare
Applications
- 3JH and 4JH Series engines
- Scheduled annual or seasonal impeller service
- Restoring cooling after a high temperature alarm
- Spring commissioning and winter layup
- Recovering a pump that was run dry
- Spares kept aboard for offshore passages
Specifications
- Brand: Yanmar
- Manufacturer: Yanmar Marine
- Manufacturer Part Number: 129670-42610
- Part Type: Impeller Kit
- Fits: 3JH and 4JH Series engines
- Quantity Used: One per pump
- Condition: New
Frequently Asked Questions
Q: What else should I check while it is open?
The cam and the wear plate for scoring, and the cover face for flatness. All three affect how much water the new impeller can actually move.
Q: The old impeller is missing a vane. Does the kit cover that?
The kit gets the pump running again, but the missing piece still has to be found. Check the heat exchanger inlet before you call the job done.
Q: Can I use it as a preventive spare rather than fitting it now?
That is exactly what it is best kept for. Store it out of sunlight and away from heat and it will be ready when it is needed.
Q: What is the advantage over buying the impeller alone?
The cover seal is disturbed as soon as the pump is opened, and a cover that does not seal properly draws air rather than water. The kit puts that right in the same part number.
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 impeller kit.
CLRMarine
