Description
Technical Overview & Product Details
Fuel injection pump springs are subjected to millions of stress cycles over the engine’s service life. The 151673-51170 is manufactured from specialized, high-fatigue-resistant spring steel to prevent sag, breakage, or loss of tension. By maintaining the correct spring rate, this component ensures the plunger follows the cam profile accurately, which is vital for maintaining high-pressure fuel delivery and engine efficiency.
- Compatible Engine Type: Yanmar marine propulsion and auxiliary engine series.
- Part Number / Designation: 151673-51170.
- Component Type: Plunger Return Spring (Fuel Injection Pump).
- Material: High-tensile, fatigue-resistant alloy spring steel with protective anti-corrosion coating.
- Application: Fuel injection pump internal assembly.
Key Features & Performance
- Consistent Spring Rate: Engineered for precise tension, ensuring the plunger maintains positive contact with the cam at all operational engine speeds.
- High-Fatigue Resistance: Manufactured to withstand the intense cyclic loading typical of marine propulsion systems, preventing premature failure or loss of force.
- Precision Dimensional Tolerance: Machined to exact lengths and diameters to ensure proper seating within the pump housing and alignment with the plunger/barrel assembly.
- Corrosion Resistance: The specialized material and surface treatment provide protection against the corrosive effects of fuel moisture and engine environmental factors.
Why Source from Heybeli Marine?
A broken or weak plunger spring can lead to inconsistent fuel delivery, misfiring, and significant power loss. Heybeli Marine protects your vessel’s performance with:
- Strict OEM Interchangeability: Our 151673-51170 springs are manufactured to meet the exact stiffness and dimensional specifications required for Yanmar fuel injection systems.
- Global Strategic Logistics: We maintain a ready-to-ship inventory of these essential internal pump components, ensuring they reach your vessel or shipyard quickly to minimize maintenance delays.
- Quality Assurance: Every batch undergoes stress and tension testing to ensure the spring meets the rigorous durability standards required for heavy-duty marine operations.
- Complete Overhaul Support: We provide these springs alongside plungers, barrels, and delivery valves to help you conduct a professional, total fuel system overhaul.
Technical Maintenance Note:
When replacing the 151673-51170, it is recommended to replace the spring as part of a complete fuel pump refurbishment. Inspect the spring seats and the plunger for any signs of uneven wear or galling. Ensure the spring is seated perfectly square in its housing to prevent side-loading, which can cause erratic plunger movement or accelerated wear. During reassembly, ensure the pump housing is free of debris, as even a small amount of contamination can lead to spring binding or failure. Always refer to the Yanmar service manual for the correct spring compression measurement or orientation if applicable.
