I have a 1971 Sears HT-14 with a Briggs & Stratton single cyl. engine, model number 917.25600. I am trying to locate parts for it, but am having trouble, as it does not seem to have a model number. The tractor and engine were painted (poorly), and must have been sc***** clean. I sc***** some pain off, and saw a few partial letters, but was unable to make any of it out. Does anyone know which engine came in this tractor?