that is the part # for a small carb rebuilt kit, is universal to almost ALL tecumseh carbs
comes with float bowl ring, needle, seal, needle spring, and new bowl sealing washer
this IS IF, you DO NOT have a diaphram carb for your engine, can you get a pic? or model number of the s/b? toro has been pretty good with putting the engine model number on thier breakdowns which comes in handy
Toro has a parts look up on their site. If you put your specific model number in, you'll get exploded diagrams and parts lists to find what you're looking for. They have so many different models within the same line, like the 620 series, that you almost have to know which model you have. The model and serial numbers should be on a silvery colored sticker on the frame somewhere.
With the number in hand, you can either order directly from Toro, or seek out the part somewhere else. I did this yesterday for my own old S200.