Bought this during the 31W roller coaster yard sale for $5.00 it was non running and was rough but i like a good project. The engine is a 3.5 hp TVS90 Tecumseh dated the 19th day of 1981. All i had to do is clean the points, clean the carb replaced the spark plug and it runs like new i plan to either leave it alone or swap it to a modern deck that has side discharge because i don't bag grass.