I inherited a model 1450 w/44" mower deck after the death of my dad. It is apparent that it hasn't run in several years, I haven't tried to start it as the oil hasn't been changed in several years and the battery is dead. I always change the oil in my engines when the engine is hot, but i'm concerned about circulating this old oil, is this a reasonable concern or should I just try to start it. I also have a bad (wobbly)center pully on my mower deck. what kind of resources are there for replacing this pulley inexpensively. the key way has a lot of slop in it allowing the pulley to be rotated 60 degrees without turning the mower blade. I also have no manuals for my (new)equipment, any suggestions would be helpful.