That model # you posted ..(46903x60A) appeared to be a Murray model number , I have a lot of Murray info.
and got some "false-hits" on the number but really nothing that would be helpful. However, .. I do believe your mower
was made by MTD ... if you CALL them just maybe they have some info. buried somewhere, sorry I was
not able to do more than that, ...it's become EXTREMELY difficult to find information or parts for any
of these mowers that are more than 20 years old... too bad because these machines were built with
quality built-in ( yours attests to that ) I kills me to know that somewhere out there someone has an old dealership with manuals and info on every machine that ever rolled through his doors ...BUT !!!
http://www.mtdparts.com/equipment/m...Code=Enter+Zip+Code&proximity=10&brandCode=10.