4JH Marine
Yanmar 4JH · 4JH family — specifications, its industrial/tractor base engine, cross-referenced parts and where to buy them.
The Yanmar 4JH is a Yanmar marine diesel in the 4JH family. Yanmar designs and sells both marine and industrial diesels; internal service parts for this family are listed in the 4JH parts book and often sell cheaper through industrial/agricultural channels than under marine dealer pricing. — Yanmar OEM parts catalog in-repo (brands/yanmar/data/extracted/catalogs.csv)
NA; ~44mhp mapped from Marine Specialists JH-E; bore confirmed 4x78x86 catalog p2; hp=verify
A ✓ means at least one cheaper channel — aftermarket, the tractor/industrial base engine, or a standard component — exists for this engine in that category.
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- Category
- Marine
- Engine family
- 4JH
- Year range (approx)
- 1983–1989
- Cylinders
- 4
- Rated output
- 44 hp (32.4 kW)
- Bore × stroke
- 78 × 86 mm
- Displacement
- 1644 cc
- Max rpm
- 3600
- Continuous rpm
- 3400
- Aspiration
- Naturally aspirated