Facts About Generators
GeneratorsDirectoryCompareRepairEnginesControllersPartsManufacturersGuides
Search models or part #
Home›Repair guides›Honda›Battery Charging

Honda — Battery Charging

Maintenance

From a Honda service manual covering: EB4000, EB5000, EB6500, EM4000SX, EM5000SXK3, EM6500SXK2. Check it applies to your exact model before use.

Applies to: Honda EB4000, Honda EB6500, Honda EM4000SX, Honda GX270T2 engine, Honda GX390T2 engine

Before you start

  • Battery gives off explosive gases; keep sparks, flames, and cigarettes away.
  • Battery contains sulfuric acid; contact with skin or eyes may cause severe burns.

Procedure

  1. Turn combination switch OFF.
  2. Remove battery.
  3. Check battery for damage.
  4. Leave battery for 30 minutes.
  5. Measure battery voltage with digital multimeter.
  6. If below 12.4 V, charge battery.
  7. Connect charger positive to positive, negative to negative.
  8. Leave for 30 minutes.
  9. Measure voltage; if below 12.7 V, charge.
  10. If still below 12.7 V, replace battery.

Tools required

Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.

Specs & values

  • VOLTAGE (20°C/68°F): Fully charged: Above 12.8 V; Under charged: Below 12.4 V
  • CHARGING CURRENT/TIME: Standard: 1.1 A/ 5 – 10 h; Quick: 5.5 A/ 1 h

Full service-parts list: Honda EB6500 →, Honda EM4000SX →, Honda GX390T2 engine →

Source: Honda service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

More Honda repair guides →