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SKU:
NLT2T02645
Ships for free in 2–4 business days.
Water Pump 121023-42100 for Yanmar YM1800 YMG1800 YM2000 YMG2000
$83.69
In Stock
$83.69
Sale price
$83.69
Regular price
This replacement water pump is for Yanmar compact tractors including YM1800, YMG1800, YM2000 and YMG2000.
Estimated delivery between
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
| Make / Application | Models / Engines | Fitment Notes |
|---|---|---|
| Yanmar | YM1800 / YMG1800 / YM2000 / YMG2000 | Verify four-bolt hub and original pump number. |
| Yanmar | Related YM/YMG compact tractor models using the same pump family | Confirm engine and casting before ordering. |
Product Overview
The water pump circulates coolant through the engine and cooling system to control operating temperature during normal and heavy-load use. Replace a leaking, noisy or loose water pump before reduced coolant circulation turns into recurring overheating.
This part is a practical repair choice when the original component is worn or failed and the machine is showing problems such as coolant leaking from the pump or weep hole, rough or noisy pump bearing, pulley or hub play. Confirming the part number and application before installation helps avoid ordering a visually similar component that uses a different configuration.
Key Features & Performance
- Restores normal coolant circulation through the engine
- Useful replacement for a leaking, noisy or worn pump
- Designed around the listed engine/equipment applications
- Helps protect against overheating caused by poor coolant flow
Technical Specifications
- Hub: 4-bolt hub
- Function: Engine coolant circulation
OE / Reference Numbers
- 121023-42100
- 121450-42010
- 129350-42010
- CH15502
Common Reasons for Replacement
- Coolant leaking from the pump or weep hole
- Rough or noisy pump bearing
- Pulley or hub play
- Engine temperature rising because coolant circulation is reduced
Frequently Asked Questions
How do I confirm fitment?
Aftermarket application data shows this pump across a broad group of Yanmar compact tractors, making the original pump number and hub arrangement important fitment checks.
Is this an OEM part?
This listing is for a replacement part. Brand names and OE/reference numbers are used to identify fitment unless the listing specifically states that the item is genuine OEM.