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Home›Repair guides›Generac›Engine Ignition System Adjustment

Generac — Engine Ignition System Adjustment

Adjustments

From a Generac service manual covering: NP45G, NP52G, NP55G, NP65G, NP66G, NP72G. Check it applies to your exact model before use.

Applies to: Generac NP66G, Generac V-Twin engine

Procedure

  1. Set spark plug gap to 0.030 inch.
  2. Place a piece of 0.008-0.010 shim stock between the ignition module (or armature) and the flywheel.
  3. Loosen mounting screws and let the magnet pull the armature down against the shim stock.
  4. Tighten both mounting screws.
  5. Rotate the flywheel to remove shim stock.

Tools required

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

Specs & values

  • 0.030 inch
  • 0.008-0.010 inch

Full service-parts list: Generac NP66G →

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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