✅ Compatibility

• Make: Yanmar (Yanmar Co., Ltd.)
• Engine: Yanmar 3TN66 — 3-cylinder naturally aspirated small diesel engine (approx. 0.7L displacement, 66mm bore — one of Yanmar’s smallest 3-cylinder diesel engines)
• OEM / Cross Reference Part Numbers:
  • Yanmar OEM (hyphenated): 119225-42001
  • Yanmar OEM (continuous): 11922542001
  • Yanmar OEM (YM-prefix hyphenated): YM119225-42001
  • Yanmar OEM (YM-prefix continuous): YM11922542001
• Primary Equipment Applications — Yanmar 3TN66 Engine:
  • Yanmar sub-1-tonne micro excavators (including Yanmar B7 / Vio08 class)
  • Yanmar small agricultural equipment — walk-behind tractors and micro-tillers
  • Small industrial equipment — portable generators, water pumps, compaction equipment
• ⚠️ Fitment Note: Verify engine designation is Yanmar 3TN66 (not 3TN75 or 3TNV82 — different engine families with different water pump part numbers). Contact us for fitment confirmation.

🔧 Product Highlights

• Direct OEM Replacement — Yanmar 119225-42001 Water Pump for Yanmar 3TN66: Drop-in fit for all Yanmar 3TN66-powered micro excavators, walk-behind tractors, and compact industrial equipment — matching original Yanmar specifications
• 4 OEM Part Numbers in Four Catalog Formats — Including YM-Prefix European Format: Covers Yanmar standard hyphenated (119225-42001), continuous (11922542001), YM-prefix hyphenated (YM119225-42001), and YM-prefix continuous (YM11922542001) — all Yanmar dealer and aftermarket catalog formats
• Yanmar 3TN66 — One of Yanmar’s Smallest 3-Cylinder Diesels for Sub-1-Tonne Micro Equipment: 66mm bore, approx. 0.7L, naturally aspirated — used in the smallest Yanmar micro excavators, walk-behind tractors, and compact industrial power units where minimal size and weight are critical
• Sub-1-Tonne Micro Excavator Applications — Through-Doorway and Narrow-Gate Access Work: Powers Yanmar B7-class micro excavators designed for residential landscaping, garden construction, swimming pool excavation, and indoor demolition where standard machines cannot access
• Water Pump Wear Indicators on the 3TN66 — Act Before Engine Damage Occurs: Coolant seepage from the weep hole, bearing noise, or rising engine temperature indicate pump wear — replace promptly on this high-thermal-load small-bore engine to avoid cylinder head damage
• Yanmar — Global Leader in Small Diesel Engines for Compact Equipment: Japan’s premier small diesel engine supplier for mini excavators, agricultural equipment, and industrial power units — with the 3TN66 at the compact end of a family spanning 3TN66 through 4TNV106

📦 What's Included

• 1× Water Pump — New Aftermarket (Yanmar 119225-42001)

🔑 Key Specs

• Yanmar OEM Part Numbers: 119225-42001 (hyphenated) / 11922542001 (continuous)
• Yanmar YM-prefix: YM119225-42001 (hyphenated) / YM11922542001 (continuous)
• Compatible Engine: Yanmar 3TN66 — 3-cylinder naturally aspirated small diesel (approx. 0.7L, 66mm bore)
• Compatible Equipment: Yanmar sub-1-tonne micro excavators (3TN66 engine) — Yanmar small agricultural equipment — compact industrial power units
• Application: Engine cooling system — micro excavator / small agricultural / compact industrial
• Condition: New Aftermarket
• SKU: 119225-42001

⚠️ Verify engine designation is Yanmar 3TN66 (not 3TN75, 3TNV75, or 3TNV82) before purchasing. Contact us if unsure.