How do you add lubricant to sears rear tine tiller gearbox?

To add lubricant to a Sears rear tine tiller gearbox, first ensure the tiller is off and cool. Locate the fill plug on the gearbox, typically found on the side or top, and remove it using the appropriate tool. Using a funnel, add the recommended type and amount of lubricant until it reaches the fill level, then replace the plug securely. Always consult the user manual for specific lubricant recommendations and maintenance guidelines.