CrimpEngine 50HP — Yanmar 4JH2E
Yanmar 4JH2E — 50 HP / 36.8 kW @ 3600 RPM, 4-cyl 1817 cc naturally aspirated (bore 82 × stroke 86 mm). 2.0 kW starter cranks at ~180 A (360 A inrush); 55 A Hitachi internally regulated alternator. Predecessor to the 4JH4 series; common in 35–42 ft cruising sailboats.
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How the 4JH2E 50HP is wired
The run drawn here is the 10 ft reference run sized below. Sized against ABYC E-11 — the US reference, and what Transport Canada accepts as an alternative to TP 1332 for pleasure craft under 24 m. Confirm your own run length, routing and terminations before ordering — open this part in the designer to size it against your actual system.
What size cable and fuse does the 4JH2E 50HP need?
Sized against ABYC E-11 — the US reference, and what Transport Canada accepts as an alternative to TP 1332 for pleasure craft under 24 m. The cranking current is the starter's continuous draw. ABYC E-11 excepts cranking-motor conductors from overcurrent protection, so the fuse shown is the conventional cranking-rated (Class T) choice sized to hold the draw without nuisance tripping — not a wire-protection requirement. The conductor is sized by the Crimp engine for the cranking draw and voltage drop. The 10 ft one-way run is a stated reference, not a universal installation prescription.
Engine 50HP — Yanmar 4JH2E specifications and terminal map
- Continuous draw
- 180 A
- Rated output
- 55 A
- Surge current
- 360 A
Terminal map
| Terminal | Polarity | Direction | Rating |
|---|---|---|---|
| Starter | positive | input | 600 A |
| Alt B+ | positive | output | 200 A |
| Block GND | ground | bidi | 600 A |
What else you need to wire the 4JH2E 50HP
- 20 ft total of 4/0 AWG (120 mm²) marine cable
- Four 4/0 AWG cable lugs matched to the equipment studs
- 250 A cranking-rated (Class T) fuse at the battery
- Heat-shrink, strain relief, and terminal boots sized to the cable
Start from this part
Open the canvas with the 4JH2E 50HP already placed, then wire the rest of the system around it. Nothing to install and no sign-up — the project is saved in this browser, and you can download the file whenever you want it.
What is known, assumed, and computed.
Catalog profile
The manufacturer, model, ratings and terminal map are maintained as planning data in Crimp's component catalog. Confirm the current manufacturer manual, exact revision and installed nameplate before ordering or wiring.
Engine reference
Sized against ABYC E-11 — the US reference, and what Transport Canada accepts as an alternative to TP 1332 for pleasure craft under 24 m. The published conductor, fuse and voltage-drop result uses the visible reference length and current basis; it is not a universal installation prescription.
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