My Yardman MTD riding mower has a deck with a belt that's engaged only when I want to start cutting grass. The deck belt loops around a number of pulleys, and sometimes slips when I go too quickly in long grass, or at a regular speed through thick grass. When the belt slips, the blades slow down so that the grass isn't cut well, and the friction causes the belt to deteriorate faster. I started wondering if there was a way to prevent this, other than mowing really slowly.
I should clarify that this is an old beat up mower, and the previous owner already made modifications - with various results. For instance, I can't raise or lower the deck height. So how do you keep a riding mower belt from slipping?