Generac 8.1 GN — Battery Maintenance
Maintenance
For the Generac 8.1 GN, from the Generac owner's manual.
Applies to: Generac 8.1 GN, Generac GH-410 engine, Generac GT-530 engine, Generac GT-990 engine, Generac GT-999 engine
Before you start
- Do not dispose of the battery by incineration.
- Remove the 7.5 Amp ATO fuse from the control panel.
- Remove all jewelry.
- Wear rubber gloves and boots.
- Do not lay tools or metallic objects on top of the battery.
- Use distilled water only; DO NOT use tap water.
Parts for this job
- 0H3421S Battery Amazon eBay $283.32
Part numbers from the service-parts list for Generac 8.1 GN. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- With the generator shut down, lift the lid and remove the front panel.
- Inspect the battery posts and cables for tightness and corrosion; tighten and clean as necessary.
- Check the battery fluid level of unsealed batteries and fill with distilled water only if necessary.
- Have the Dealer or qualified technician check state of charge and condition.
Tools required
- insulated tools Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Generac 8.1 GN →
Source: Generac owner's 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.