We have a Weedeater riding lawnmower model 733-848 or HD12538j. The blade will not engage and I found a spring that fell out. I can't tell by the manual where it goes.

Can't remember myself... is it a 42 inch deck?

I have a problem on my weedeater 42 inch rider, when I go to turn off the blade it won't shut off. If anyone knows anything please let me know.