Generac — Stator Short-to-Ground Insulation Test
Testing & diagnosis
From a Generac service manual covering: QUIETPACT 55, QuietPact 65, QuietPact 75. Check it applies to your exact model before use.
Applies to: Generac QUIETPACT 55, Generac QuietPact 65, Generac QuietPact 75, Generac GTV-760 engine
Before you start
- Insulation resistance testers are a source of high and dangerous electrical voltage
Procedure
- Disconnect and isolate all stator leads including sensing, excitation, battery charge and power leads.
- Connect terminal ends of all stator leads together.
- Connect tester leads across all stator leads and to frame ground on stator can, apply 1500 volts for no more than 1 second.
- If breakdown indicated, clean and dry stator and re-test; replace stator if it fails second test.
Tools required
- Hi-pot tester or megohmmeter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 1500 volts, do not exceed 1 second
Full service-parts list: Generac QUIETPACT 55 →, Generac QuietPact 65 →, Generac QuietPact 75 →
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.