| Battery | Standard specific gravity | 1.25 to 1.29 at 20°C (68°F) | ||
| Charging circuit without load | Standard amperage | 10 A or less | ||
| Standard voltage | 13.2 to 14.8 V (when engine speed at 2,000 rpm) |
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| Charging circuit with load | Standard amperage | 30 A or higher | ||
| Generator rotor | Standard resistance | between the slip rings | 130 A type: | 2.3 to 2.7 Ω at 20°C (68°F) |
| 150 A type: | 1.5 to 1.9 Ω at 20°C (68°F) | |||
| 180 A type: | 1.36 to 1.76 Ω at 20°C (68°F) | |||
| between the slip ring and rotor | 10 kΩ or higher | |||
| Standard diameter | 14.2 to 14.4 mm (0.559 to 0.567 in.) | |||
| Minimum diameter | 14.0 mm (0.551 in.) | |||
| Generator brush holder | Standard exposed length | 10.5 mm (0.413 in.) | ||
| Minimum exposed length | 4.5 mm (0.177 in.) | |||