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Generac G9.0L G26 — Firmware Update (if required)

Installation · PZ410 Controller

For the Generac G9.0L G26, from the Generac service manual.

Applies to: Generac 130 kW PME, Generac 150 kW PME, Generac 9.0L Gaseous Engine (G26) engine

Procedure

  1. Connect negative battery terminal and tighten nut.
  2. Install 7.5 A fuse and configure install wizard.
  3. With generator controller OFF, enter Edit menu.
  4. Select Update Firmware and press Enter.
  5. Insert USB drive with current firmware and follow prompts.
  6. Press Escape until sub menu screen displays.
  7. Enter dealer menu, select Dealer/Edit, select Auxiliary Stop Setting.
  8. Select Auxiliary Shutdown, then press Escape until submenu displays.

Tools required

  • USB drive with current firmware Amazon

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

Specs & values

  • Firmware version 1.19 or later required

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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