Generac G0072100 — Generator Tests Under Load
Testing & diagnosis
For the Generac G0072100, from the Generac service manual.
Applies to: Generac G0072100
Before you start
- Do not manually transfer under load.
Procedure
- Verify generator in OFF mode and set MLCB to OFF (OPEN).
- Turn off all breakers/loads.
- Turn off utility power to transfer switch.
- Manually set transfer switch to STANDBY (load to E1/E2).
- Press MANUAL button to start engine; record cranking fuel pressure.
- Warm up, record running fuel pressure.
- Set MLCB to ON (CLOSED); turn on loads one by one.
- Verify approximately 240 volts and 60 Hz.
- Run at full rated load 20–30 minutes; inspect for leaks/overheating.
- Record loaded fuel pressure.
- Turn off loads and set MLCB to OFF.
- Run at no-load 2–5 minutes; press OFF.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 240 volts approximately
- 60 Hz approximately
- full rated load run 20–30 minutes
Full service-parts list: Generac G0072100 →
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.