Hello, my name is Tim and from Indpls In. I recently acquired a very old 3 wheel Craftsman riding mower with what I believe to be a Tecumseh/Lauson LAV engine. I have not been able to find much about it except that Sears does have parts diagram. Frame # 131 88380 w/ engine # 143 43202. Sticker on engine says 3.25hp, cannot find any info. Would love to know year. Also have old Excello push mower. Love old motors of any kind. Very much enjoy the site. Thank you.