newb with a JD 52 commercial walkbehind rebuild

hi all, new to the forum and new to the jd 52 walkbehind, long story short i am doing a winter rebuild on this machine,its an older model i picked up cheap, deck and all seems very solid , the motor has been picked at a little kawasaki FB460V - Cso2 ? the starter is gone no air filter and a stuck exhaust valve, got the valve freed up, carb cleaned, i am in search of identifying the motor year so I can order the correct parts as well as the machine itself, so far I have only been able to find that maybe it's a 1990 - 1991 any info would greatly be appreciated, Thank You !