Yanmar Fuel Feed Pump Assembly 121256-52021 - OEM Fuel Lift Pump
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Genuine OEM Yanmar fuel feed pump assembly (part number 121256-52021) designed to deliver reliable fuel transfer from the tank to your engine's injection system. This complete factory-spec pump assembly ensures consistent fuel flow and pressure, maintaining optimal engine performance and preventing fuel starvation issues.
Key Features:
- Genuine Yanmar OEM part - exact fit and performance
- Part Number: 121256-52021
- Complete pump assembly ready to install
- Precision-engineered for consistent fuel delivery
- Durable construction for long service life
- Maintains proper fuel pressure and flow
- Direct replacement for worn or failed fuel pumps
Function & Importance:
The fuel feed pump (also called a lift pump) is a critical component that transfers diesel fuel from the tank to the injection pump. It maintains the proper fuel pressure needed for efficient combustion and smooth engine operation. A failing fuel pump can cause hard starting, loss of power, rough running, or complete engine shutdown.
Signs of Fuel Pump Failure:
- Difficulty starting, especially when hot
- Loss of power under load
- Engine stalling or dying unexpectedly
- Rough idle or surging
- Visible fuel leaks around the pump
- Air in the fuel system
Installation:
Always replace the mounting gasket when installing a new fuel pump (gasket sold separately). Ensure all fuel lines are clean and free of debris. Prime the fuel system after installation to remove air. Check for leaks before starting the engine. Torque mounting bolts to manufacturer specifications. Refer to your Yanmar service manual for detailed installation procedures specific to your engine model.
Compatibility:
Verify this part number matches your engine's requirements before ordering. Consult your Yanmar engine manual or parts diagram for your specific model, or contact technical support if you need assistance confirming compatibility.
Restore reliable fuel delivery to your Yanmar diesel with this genuine OEM fuel feed pump assembly. Essential for maintaining peak engine performance and preventing fuel system failures.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.