Hello Chaco123
Thank you for sharing your experience. Before using the mower, raise the deck height to the cutting position best suited for your lawn. Cutting height is adjustable from 1-4 inch. Deck should be raised to avoid stumps, rocks or other obstacle that might damage mower deck. To adjust the cutting height: 1. Stop the mower and disengage blades. 2. Turn the key to OFF position and press and hold the parking brake pedal, then fully depress the brake pedal to set the parking brake. 3. Grasp the deck height adjustment lever and move it inwards to disengage it from the detent. 4. Move the deck height adjustment lever downward and upward and engage it into the detent when it arrives at the desired cutting height. This information can also be found in the user manual, see Deck Height Adjustment Lever (Reference 5.1.1) under Features and Controls.
The suggested area cover is up to 1.25 acres and the actual run-time will vary depending on grass condition, species, density, moisture, etch and lawn size. if you wish to address your concerns directly with one of our product specialists first, please contact us by Live Chat through the customer contact page located on our website or call Greenworks Pro toll-free helpline at 1-855-345-3934 before returning to the store. We would like the opportunity to speak with you to see whether your run time would be considered average.