The Yanmar 3TN84 and 4TNE84T are compact industrial diesel engines in Yanmar's TN/TNE-series, powering compact construction equipment, generator sets, and specialty OEM applications worldwide. When an injector fails, you'll experience hard starts, rough running, excessive smoke, misfires, and reduced power output. This brand-new aftermarket injector is a direct replacement covering part numbers 729503-53200 and 729103-53100, precision-matched to OEM spray pattern and injection pressure for the 3TN84TL-RBVM, 3TN84TE, 4TNE84T, 4TNE84T-EHP, 4TNE84T-G1A, and 4TNE84T-SA engine variants.

✅ Direct-Fit Compatibility

• Yanmar 3-Cylinder Engines: 3TN84TL-RBVM, 3TN84TE
• Yanmar 4-Cylinder Engines: 4TNE84T, 4TNE84T-EHP, 4TNE84T-G1A, 4TNE84T-SA
• Suitable for compact construction equipment, generator-set, and specialty OEM applications
• Bolt-on replacement — no modifications required

🔧 Product Highlights

• 100% Brand New Aftermarket: Not rebuilt or refurbished — starts with a full service life
• OEM-Spec Fuel Atomization: Precise spray pattern for clean combustion, restored power, and reliable operation
• Targeted Single-Unit Replacement: Ideal when diagnostics confirm one failed injector
• Dual Primary Part Numbers: Covers both 729503-53200 and 729103-53100 for confirmed fitment across all listed variants
• Protects Downstream Components: Restores proper fuel pressure to reduce stress on the injection pump and remaining injectors
• No Dealer Markup: OEM-equivalent quality at aftermarket pricing

📦 What's Included

• 1 × Fuel Injector (729503-53200 / 729103-53100)

🔑 Key Specs

• Part Numbers: 729503-53200, 72950353200, 729103-53100
• Condition: 100% New Aftermarket
• Quantity: 1 piece (single cylinder replacement)
• Fitment: Yanmar 3TN84TL-RBVM / 3TN84TE / 4TNE84T / 4TNE84T-EHP / 4TNE84T-G1A / 4TNE84T-SA engines

Servicing all cylinders? Our 3-pack (SKU: 729103-53100) covers all three cylinders for 3TN84TL / 3TN84TE engines, and our 4-pack (SKU: 729103-53100) covers all four cylinders for 4TNE84T engines — both at a lower cost-per-injector. Please verify your engine serial number and existing part number before ordering. Contact us for fitment confirmation if needed.