Kohler 12RES / 8.5RES — Battery Electrolyte Check
Maintenance
For the Kohler 12RES / 8.5RES, from the Kohler operator's manual.
Applies to: Kohler 12RES, Kohler 8.5RES, Kohler CH20 engine, Kohler CH 740 engine
Before you start
- Wear splashproof goggles and gloves.
Parts for this job
Part numbers from the service-parts lists for Kohler 12RES, Kohler 8.5RES. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Remove filler caps.
- Verify electrolyte reaches bottoms of filler holes.
- Refill with distilled or clean tap water if necessary.
- Do not add electrolyte.
- Install and tighten filler caps.
- In freezing temperatures, run generator set 20-30 minutes to mix water.
Tools required
- battery hydrometer optional Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Specific gravity 1.260 at 26.7 C (80 F)
Full service-parts list: Kohler 12RES →, Kohler 8.5RES →
Source: Kohler operator'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.