I probably bought the model OD21359B, 21" push mower in 1992, the yr it was introduced. Solid little mower deck & the handles are sturdier than most other mowers. Replaced the handles twice. 3.5 HP Briggs engine overheats quickly. Would it be advisable to get a new motor (preferably with more power) or send this guy to the scrapyard? I'm worried the handles will again break, with no one stocking them. I'd think someone would make a handle that would fit, but maybe I'm wrong. Thx.