I have a John Deere GX85 Lawn Tractor. It is equipped with a B&S 13 HP Engine model number: 28M707, type: 1147-E1, code: 971017ZB. 2 valves, 1 cylinder.
A brief history: Last season it was started without filling the crankcase with oil and it "died". I wasn't there but the report is that it...