I inherited a green MTD TurfPower 42" lawn tractor with a 12 h.p. Briggs engine bought originally in about 1992. I try to keep it running in memory of my dad. It uses a little oil and had been running o.k., but now when I shut it off, it makes a clanging sound and it wheezes when it stops. I'm guessing it could be something with the valves. Any ideas?
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