High‑Performance Diesel Fuel Injection Pump – Yanmar 3TN Series / 729267‑51320 (X3) | Premium OEM & Aftermarket Replacement For Industrial Diesel Engines

When professional engine builders, diesel repair shops, and equipment OEMs search for a reliable, durable fuel injection solution for Yanmar 3TN series engines, they need performance, precision and global compatibility. The 729267‑51320 Diesel Fuel Injection Pump (X3 OEM or high‑quality replacement) is engineered to meet those exact expectations, delivering dependable fuel metering, optimized combustion and long service life for small industrial diesel engines commonly used in construction, agriculture, and light commercial equipment worldwide.

 

 

✅ Engineered for Fitment & Performance

This pump is specifically manufactured for Yanmar 3TN series engines including 3TNV84, 3TNV86, 3TNV88‑3 and similar variants, ensuring OEM‑equivalent form, fit, and function. It delivers consistent fuel pressure and calibrated flow profiles that support smooth engine operation across load ranges.

Part Number: 729267‑51320

Compatible Engines: Yanmar 3TNV84 / 3TNV86 / 3TNV88

OE / Replacement: X3 OEM standard

Package: Neutral or OEM packaging available

Warranty: Standard 3‑12 months depending on supplier

 

 

While specific calibration charts and fuel curves vary by engine application, typical performance expectations for this class of mechanical diesel injection pumps include:

Precise Metering: Designed for accurate injection timing to support optimized combustion and improved torque response.

Robust Construction: High‑strength internal components engineered to withstand continuous operation and heat stresses.

Global Standards: Manufactured and tested to meet ISO quality protocols relevant to diesel fuel systems.

💡 Note: Always confirm the pump type with your engine serial number to avoid mis‑fitment. Some markets list a related part number (e.g., 729242‑51400) that is interchangeable with 729267‑51320 in certain Yanmar assemblies.

 

 

Maximize service life and reliability with targeted maintenance:

Regular Fuel Filtration: Always use high‑quality filters and check for contamination.

Clean Fuel Storage: Prevent microbial growth and water ingress in stored diesel fuel.

Routine Inspection: Check for leaks, wear and pump timing drift during scheduled service intervals.

Professional Calibration: If in doubt, have the pump verified by a qualified diesel technician familiar with Yanmar systems.

 

 

Upgrading to premium low‑sulfur diesel and anti‑gelling additives can further protect high‑pressure pump components.

Consider matched injector sets when replacing the pump to ensure synchronized performance across cylinders.

 

 

Q1: Is 729267‑51320 an OEM original part or an aftermarket equivalent?
A1: It's offered as both genuine OEM and high‑quality aftermarket for cost‑effective maintenance and repairs. Warranty coverage varies by supplier.

Q2: Which Yanmar engine models will this pump fit?
A2: Designed for Yanmar 3TNV84, 3TNV86, 3TNV88‑3 series diesel engines used in compact machinery and industrial power units.

Q3: What is the expected delivery and stocking status for this part?
A3: Standard dispatch ranges from 1–5 business days with global logistics options like DHL, UPS, and FedEx.

Q4: Can this pump be re‑calibrated for performance gain?
A4: Diesel calibration requires specialist equipment; performance tuning should only be done by certified technicians to avoid engine stress.

Q5: What maintenance extends pump life most effectively?
A5: Use clean fuel, inspect seals and lines, and service fuel filters regularly for maximum longevity.

Q6: Does this pump support emissions compliance?
A6: Yes, when matched with correct engine management and exhaust controls, it facilitates efficient combustion to meet regional emissions standards.

 

 

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