Generac — Test 6 – Check Capacitor
Testing & diagnosis · Excitation capacitor
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
- The capacitor may need to be discharged before testing. Use proper protective equipment with an exploded capacitor.
Procedure
- Consult meter owner's manual for measuring capacitance.
- Connect meter leads directly across the capacitor terminals.
- Read the µf; should display the rated value ± 5µf.
- Replace capacitor if any other reading is displayed.
Tools required
- capacitance meter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- ± 5 µf tolerance
- Configuration A 47µf (440 VAC); Configuration B 28µf
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.