I edited this from another teacher from somewhere and thought I would share it with everyone. It is a good sub plan or 'rainy day' activity. This could work for any engine, but I have Briggs engines so I have all the manuals that I got through the Power Portal (which you should get if you don't already have it, free for teachers and lots of resources).
Students need to find the model and type of their engine, they then have to use the illustrated parts diagrams to find the references and part numbers. They then use the Briggs and Stratton website to look up pricing. Every year I have a group that will need to order a part so I make them go through this process.
The second part is looking at the advanced manual for engine specs. They need to find the tool sizes, dimension, and torque for different parts (you can edit to what you would like!) then I had some other questions like the spark plug gap, armature air gap etc that they will need to know when putting their engine back together.
I have 6 snow series engines are in my shop. I have attached the two manuals they use and the worksheet. Again manuals for all briggs engines can be found on the Power Portal.