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Generac — Adjust Armature Air Gap

Adjustments · Ignition Armature

From a Generac service manual covering: EVT-04629-0, EVT-04629-1, EVT-04717-0, EVT-04797-0. Check it applies to your exact model before use.

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Procedure

  1. Rotate flywheel until magnet is under armature laminations.
  2. Place 0.20-0.30 mm (.008"-.012") thickness gauge between magnet and armature laminations.
  3. Loosen mounting screw so magnet pulls armature down against the gauge.
  4. Torque screws to 12.2 Nm (9 ft. lbs.).
  5. Rotate flywheel to remove thickness gauge and repeat for second armature.

Tools required

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

Specs & values

  • Armature air gap 0.20-0.30 mm (.008"-.012")
  • Torque 12.2 Nm (9 ft. lbs.)

Source: Generac 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.

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