Yanmar 6LY2-STE — Thermostat testing
Maintenance
For the Yanmar 6LY2-STE, from the Yanmar service manual.
Applies to: Yanmar 6LY2-STE, Yanmar 6LY2-STE/6LY2A-STP/6LYA-STP engine
Procedure
- Put thermostat in breaker with fresh water.
- Heat on electric stove.
- Check starts to open between 69.5~72.5°C.
- Check opens 8 mm or more at 85°C.
- Replace if not functioning normally.
Tools required
- Thermometer Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Open 69.5~72.5°C
- Lift 8 mm at 85°C
Full service-parts list: Yanmar 6LY2-STE →
Source: Yanmar 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.