Engine
- Yanmar 4JH2E, 50 hp inboard, freshwater-cooled diesel
- Repowered 1998 (current engine)
- Serpentine belt conversion driving the Balmar 120A alternator
- Spare parts aboard: filters, belts, seals, wiring, etc.
- Capacity (with filter): 4.8 L (5.1 qt)
- Grade: Chevron Delo 400 XLE 15W-40 CK-4 (or any 15W-40 CD or higher)
The 4JH2E has two oil fill plugs, both labeled "oil" and physically interchangeable. Don't conflate them:
- Valve cover = main crankcase (the 4.8 L fill above)
- Pump assembly fill = raw water pump gear oil (~100–200 mL). Use vacuum extraction to drain — no drain plug.
The pump fill is a real maintenance item, not optional.
- 2 × 45 gal tanks (90 gal total)
- Tanks were pulled, cleaned, and POR-15 protected in 2019
- Fuel sender: resistive 2-wire, monitored via ESP32 + ADS1115 + ...
| Date | Photo | Notes |
|---|---|---|
| 2026-04-30 |  |
Pre-replacement photo — housing inspected, impeller removed intact |
| Date | Action | Parts | Next Due |
|---|---|---|---|
| 2026-05-02 | Replace impeller | Johnson 4JH2E kit | 2027-05 |