Gas generators can handle the most unkempt of lawns and are more durable. Mower manufacturers promote 3-in-1 mulching, and their generators as unwanted discharge, 2-in-1, meaning bagging and mulching or side mulching and discharging, and side release. Many 2-in-1 bagging and mulching mowers require another attachment to discharge bud on the lawn. Some side discharge mower producers sell separate”mulching plates” which will cover the opening on the side discharge mower