Thank you, Rivets. I had found this Toro page but did not see the engine number there. Is there another link to get to the model number or is it from experience? I may be looking right at it but I sure appreciate the quick response.
I have an old Toro self-propel from about 1988. The model 20611 serial number 9021990. It has what I remember to be a 3.5hp Tecumseh engine. It still runs and the deck and self propelled drive still is in working order. The motor is hard to start but will run. I wanted to get a gasket set so...