Thread Bump . . .
These are more for teaching about chainsaw operation and maintenance, which is related to safe use.
- worn sprockets to compare with new ones (several people did not understand when to replace them by a verbal description alone);
- nose sprockets: to describe different pitches, wear, etc. (*I need to make a cut-away model of a nose sprocket showing all of the bearings!*);
- scored piston: to discuss effects of straight gassing, lean seizures, etc.;
- carburetor: to explain choke versus throttle plates, idle adjustments, etc. *I also have all of the parts of a disassembled carb in a zip-lock baggie to show how how complicated they can be, as well as to mention gaskets, diaphragms, etc.:
fuel filter: to show how small the pores are in the ceramic element:
- etc..
Other items could include fouled spark plugs, or anything else of interest that is hard to show on an assembled saw (clutches, oil pumps, needle bearings, crank shafts, . . . ). These parts are essentially free, as they were intercepted on the way to the scrap / recycling bins. If you don't have what you need, most servicing dealers should be able to give some to you (might have to assure them that they are not for resale or warranty purposes).
I also have a partial pair of chaps that I bring, so that people can see what the protective fibers look like. These were retired chaps left over from doing a demo (*note: can really jam up the nose sprocket on the guide bar too - plan for this, or use a hard nose (no sprocket) bar:
http://www.arboristsite.com/community/threads/nose-sprocket-rescue-illustrated.256640/ )
Philbert
