3JH40 Marine
Yanmar 3JH40 · 3JH family — specifications, its industrial/tractor base engine, cross-referenced parts and where to buy them.
The Yanmar 3JH40 is a Yanmar marine diesel in the 3JH40 family. Yanmar designs and sells both marine and industrial diesels; internal service parts for this family are listed in the 3JH40 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)
common-rail; Yanmar publishes max only
A ✓ means at least one cheaper channel — aftermarket, the tractor/industrial base engine, or a standard component — exists for this engine in that category.
The OEM parts book lists a factory second / extra alternator option for the 3JH40 — not standard equipment. Use the kit or hardware below when fitting a house-bank / domestic alternator.
| Part No. | Description | In figure |
|---|---|---|
| 129677-77600 | ALTERNATOR KIT, JHCR | Fig 41 — ALTERNATOR KIT(2ND)(OPTIONAL) |
| 129677-77630 | BRACKET, 2ND | Fig 41 — ALTERNATOR KIT(2ND)(OPTIONAL) |
| 129677-77640 | ALTERNATOR KIT,ISOLA | Fig 42 — ALTERNATOR KIT(2ND)(ISOLATED TYPE)(OPTIONAL) |
| 129677-77670 | HARNESS, 2ND ALT 12V | Fig 41 — ALTERNATOR KIT(2ND)(OPTIONAL) |
| 129677-77680 | HARNESS, 2ND ALT 24V | Fig 41 — ALTERNATOR KIT(2ND)(OPTIONAL) |
External links — we host none of these documents.
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- Category
- Marine
- Engine family
- 3JH
- Year range (approx)
- from 2018
- Cylinders
- 3
- Rated output
- 40 hp (29.4 kW)
- Bore × stroke
- 88 × 90 mm
- Displacement
- 1642 cc
- Max rpm
- 3000
- Continuous rpm
- 3000
- Aspiration
- Naturally aspirated