Generac — Do a Fixed Excitation Test
Testing & diagnosis · Rotor/Voltage Regulator
From a Generac service manual covering: 9202-1, 9203-1, 9204-1, 9205-1, 9206-1, 9207-1, 9290-2, 9509-2, 9592, 9593-0, 9593-1, 9593-2…. Check it applies to your exact model before use.
Applies to: Generac 9592, Generac V-Twin engine
Before you start
- Do not connect other end of positive jumper until ready
Procedure
- Disconnect Wires No. 4 and 0K from Voltage Regulator.
- Connect jumper from battery positive to Wire No. 4.
- Connect jumper from battery negative to Wire No. 0K.
- Connect AC voltmeter across generator AC output leads.
- Start engine, let stabilize.
- Connect positive jumper to Wire No. 4.
- Read AC voltage; should be about 45-55 percent of rated voltage.
- Stop engine and reconnect Wires 4 and 0K.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Approximately 45-55 percent of rated voltage
Full service-parts list: Generac 9592 →
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.