Generac — Test 4 – Field Flash Alternator (Configuration A Only)
Repair & overhaul · Brushless capacitor alternator
From a Generac service manual covering: GP1800, GP1850, GP3250, GP5000, GP5500, GP6500, GP7000, GP8000. Check it applies to your exact model before use.
Applies to: Generac GP1800, Generac GP3250, Generac GP5000, Generac GP5500, Generac GP6500, Generac GP7000, Generac GP8000, Generac OHVI engine
Before you start
- Do NOT energize the capacitor for more than 1 second at a time.
- Do not field flash alternator more than two times in sequence.
Procedure
- Construct an energizing cord as shown and connect as shown.
- Set START-RUN-STOP switch to OFF position.
- Momentarily turn on the energizing cord (one second).
- Disconnect the energizing cord from the capacitor.
- Check generator produces approximately 240 VAC at main circuit breaker.
Tools required
- energizing cord (12 AWG, momentary pushbutton switch) Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- ~240 VAC at main circuit breaker
Full service-parts list: Generac GP1800 →, Generac GP3250 →, Generac GP5000 →, Generac GP5500 →, Generac GP6500 →, Generac GP7000 →, Generac GP8000 →
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.