The forward/reverse pedal on my B2100 gets stuck in the direction I last pressed it...basically it doesn't return to "neutral". Now things are a bit rusty under there, so I've added lots of white grease, messed with the neutral return springs a little, but no dice. The pedal acts fine when the machine is not running, so maybe its internal? I also recently changed the fluid, spin on filter and cleaned the screen (which I could tell had never been cleaned before). What am I missing? There's a damper piston down there...maybe that's it? Thanks fellas