Yanmar 119773-42520 Pump Drive Gear for 6LP and 6LPA
The Yanmar 119773-42520 is the genuine pump drive gear for 6LP and 6LPA Series engines. It is what turns the pump: driven from the engine gear train, it puts the drive into the pump shaft so that the raw water pump runs whenever the engine runs.
Gears are replaced for tooth wear, for chipped or broken teeth, and for wear at the bore or the drive that locates them. A gear with a tooth missing usually announces itself with a knock at idle that changes with load, and the piece that broke off has to be accounted for because a fragment loose in the gear train does further damage.
Key Features
- Genuine Yanmar replacement pump drive gear
- Fits 6LP and 6LPA Series engines
- One per pump
- Positive gear drive from the engine to the pump
- Replaces a gear with worn, chipped or broken teeth
- Inspect the mating gear at the same time
Applications
- 6LP and 6LPA Series engines
- Raw water pump drive repairs
- Replacing a gear with a chipped or broken tooth
- Curing excessive backlash in the pump drive
- Engine rebuild and refit work
- Marine diesel service and overhaul
Specifications
- Brand: Yanmar
- Manufacturer: Yanmar Marine
- Manufacturer Part Number: 119773-42520
- Part Type: Pump Drive Gear
- Fits: 6LP and 6LPA Series engines
- Quantity Used: One per pump
- Condition: New
Frequently Asked Questions
Q: How do I inspect the teeth?
Look along each tooth flank for pitting, a stepped wear line, or any chipping at the ends. Then rock the gear against its mate by hand and judge the backlash.
Q: A tooth has broken off. What else should I check?
Find the piece. A fragment loose in the gear train will damage whatever it meets next, and it has to be accounted for before the engine is turned over.
Q: Should the mating gear be replaced too?
Inspect it carefully. Gears wear as a pair, and a new gear against a worn mate picks up the wrong profile quickly.
Q: What causes a pump drive gear to fail early?
A seized or stiff pump is the usual cause. The gear is driving a load it was never meant to carry, and the teeth take it.
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 pump drive gear.
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