Hello Peter99.
Sorry to hear about your experience. When units begin clogging, shutting off, or leaving clumps, it is often tied to cutting conditions and airflow rather than a lack of overall capability. Tall, dense, or damp grass is the most common cause of clogging and shutdowns, as it restricts airflow under the deck and triggers the mower’s protection system. For best results, try mowing when the grass is completely dry, start at a higher deck height, and take a first pass before lowering for a finish cut, this reduces load and helps prevent buildup. Slowing your walking speed can also gives the blade time to properly lift and discharge clippings. If you are bagging, please make sure the bag is fully seated and not overfilled, as this can reduced airflow and will cause clumping and poor collection; periodically clearing the underside of the deck and ensuring the blade is sharp can also make a noticeable difference in both cutting and bagging performance.
Regarding runtime, battery performance can drop in heavy conditions like overgrown or thick lawns, so needing multiple batteries or partial recharges can occur if the mower is working under constant high load. Using a higher cut first and maintaining the lawn more frequently can help extend runtime per charge. That said, if you are still experiencing frequent shutdowns, excessive clogging, or very short runtime even in normal, dry conditions, it may indicate a battery, blade, or airflow-related issue that we can look into further. We would recommend reaching out to support so we can help troubleshoot with you directly. They can be reached either using the online chat function, on Greenworks Tools page, or by calling 1-888-909-6757.

Thank you for sharing your experience. We are glad to hear you are happy with the mower’s overall performance, but we understand how frustrating the runtime has been. Battery runtime on the 80V platform can vary quite a bit depending on usage conditions, and using the self-propelled drive does place additional demand on the batteries. Factors like grass thickness, cutting height (especially lower settings), mowing speed, and terrain can all impact how long the batteries last. To help improve runtime, you might try mowing at a slightly higher deck height, using the self-propel feature only when needed, and maintaining a steady, moderate walking pace. Keeping the blade sharp and mowing more frequently to avoid heavier cuts can also make a noticeable difference. It is also worth noting that a 2.0Ah battery will provide shorter runtime compared to a 4.0Ah, so performance may feel limited when relying on smaller-capacity batteries, especially with self-propel engaged. For larger areas or extended sessions, higher-capacity batteries (such as 4.0Ah or above) are typically better suited.
If you continue to see a reduced runtime under normal mowing conditions, it may be worth reaching out to Greenworks for further evaluation. They can be reached either using the online chat function, on Greenworks Tools page, or by calling 1-888-909-6757.