Hello, I have just rebuilt an AENL Wisconsin engine with a WW79A PTO assembly on an old Stone mortar mixer. All of the engine tags are legible and would say are in decent condition for the age of the unit. I could use some help in identifying the year of the engine though. A little background on this unit, I started out buying the mortar mixer last year with thoughts of re-powering but a friend of mine talked me out of it. The engine was in pretty rough shape. It would turn over with little to no effort and after removing the cylinder head , I found the exhaust valve was stuck open. My friend and I were able to get the valve freed up and able to start the engine. I decided to rebuild it for some odd reason and I am happy I did so. It runs and looks great! So to kind of complete this for me I would like to find out the year of manufacture or close to.
Here is the info: MD: AENL SN: 5097311
Here is the info: MD: AENL SN: 5097311