I removed my blade to sharpen and re-installing I see the notched washer but it doesn't engage the drive shaft. The mower moves under power but when I try to mow I get a blinking yellow light followed by a blinking green light. What did I do wrong?
Sorry to hear that, George. If you haven't already, please give our service team a call at 1-855-346-5656. They can help! In the meantime, try removing the battery and carefully turning the blade by hand. Does it spin easily?