My HRM-215 with the 3-speed transmission takes some extra effort to roll the mower backwards. I don't know if this is normal? When using the self-propel feature in any gear, it randomly drops out/jerks. It seems random enough that I hope it isn't a failed transmission. I don't know if these transmissions have internal plastic gears. Any ideas? It's hard to see the belt drive section but it does look like the belt is tight. I bought it at an Estate Sale is why I have no history.
