Hanchi Auto Parts
121000-42100 Water Pump Suitable for Yanmar 3d75 High Quality
Couldn't load pickup availability
121000-42100 is a Yanmar water pump OE number. Our replacement matches the same mounting and cooling specs, fits 3d75 engines, and ships with a 0.76 kg net weight (8 pcs per carton). Cross numbers: 1932742100.
Which engines use the 121000-42100 water pump?
This pump was designed for 3d75.
When in doubt, compare the old pump pulley height against our spec table below — it settles most fitment questions.
What are the specifications of 121000-42100?
| Parameter | Value |
| OE number | 121000-42100 |
| Fits brand | Yanmar |
| TO Shaft head height | 105.9 |
| Mounting hole position | Aligned to OE mounting points |
| Flange thread | 4-M6X1 |
| TO Flange height | 99.4 |
| Flange jumping | 0.07 |
| TO Impeller height Ⅰ | 0.68 |
| Air tightness testing | No leakage detected under negative pressure of 0.1 MPa |
| Appearance Ⅰ | Neutral finish, no third-party logos |
| Appearance Ⅱ | Clean surface: no dirt, rust or paint peeling |
| Assembly rotation | Turns freely by hand, no sticking or noise |
| Included Component 1 | YA125-WD-1 |
| Net weight of one | 0.76 |
| Net weight | 0.76 kg |
| Packing | 8 pcs/ctn, 8.10 kg gross |
What part numbers interchange with 121000-42100?
One pump, many part numbers. The full cross list:
- 1932742100
Packing and quality checks
Packing runs 8 pumps per carton, 8.10 kg gross weight, carton size 38.5 x 32 x 31.5 cm.
Before boxing, each pump passes a negative-pressure leak check and a hand-rotation check for smooth, noise-free bearing movement.
Frequently asked questions
What vehicles or engines does 121000-42100 fit?
121000-42100 fits 3d75 engines. It is a Yanmar application water pump, and our aftermarket unit replaces it directly.
What other part numbers replace 121000-42100?
121000-42100 interchanges with 1932742100. All of these refer to the same water pump assembly.
Is 121000-42100 available from stock?
Yes, this number is in regular production. Lead time for carton quantities is usually a few days; ask us for current stock before ordering.
How much does the 121000-42100 water pump weigh?
One pump weighs 0.76 kg net. A full carton of 8 pieces comes to 8.10 kg gross.
How do I confirm 121000-42100 is the pump I need?
Check the OE number stamped on your old pump or in the parts book, then compare engine model and pulley height with the spec table on this page. If anything is unclear, send us a photo of the old unit.
Bulk pricing starts at one carton. Ask for a quote with your target quantity.
Send the OE number, your quantity and your destination port — feel free to Contact Us. We reply with fitment confirmation and a quote.
OEM Avalible
Our company understands the challenges of bringing some special parts from paper to reality. Therefore, we offer our services to customers that need help.