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Generac GT-530 — Adjusting Magneto Flywheel Gap

Adjustments · Ignition magneto

For the Generac GT-530, from the Generac service manual.

Applies to: Generac GH-410 engine, Generac GT-530 engine, Generac GT-990 engine, Generac GT-999 engine

Before you start

  • Air gap between ignition magneto and flywheel on single cylinder engines is not adjustable.

Procedure

  1. Rotate the flywheel until the magnet is under the module (armature) laminations.
  2. Place a 0.008-0.012 inch (0.20-0.30mm) thickness gauge between flywheel magnet and module laminations.
  3. Loosen the mounting screws and let the magnet pull the magneto down against the thickness gauge.
  4. Tighten both mounting screws.
  5. To remove the thickness gauge, rotate the flywheel.
  6. Repeat the above procedure for the second magneto.

Tools required

  • 0.008-0.012 inch thickness gauge Amazon

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

Specs & values

  • Magneto gap 0.008-0.012 inch (0.20-0.30mm)

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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