Not screwdrivers. Use rods that you grind to fit. Don't forget to angle the point so you get as much surface to surface. No sharp ends or hard punches, just knock it.... Vibrations is what you are after more than the forces. Screwdriver handles often silent the tiny vibrations you want.
A hit on...
That works if you know what you are doing and pay attension. Greater risks involved and some engines don't like it at all, others very much.
I use a man powered solid socket wrench and knock it manually most of the times.
There is no such thing as an "expert chainsaw mechanic"!
Just different levels on a learning curve...
I have seen way to much to think this "stick in tool" is a fool proof solution to a old problem that has been around forever.
However it beats the piston stoppers that are fixed/threaded...
These "Stick in" type stoppers go in the tool kit along with saw at purchase. You can buy them too, they are cheep.
Pay attention as they are not universal tools (neither is the bolt in).
It is not just the point of placement it is position of crank/rod and side pressure to piston that is...
This is a good learning experience that did not cost much! Perfect! It is the best way to learn.
Next time you pay attention. Folded starter rope evenly distributed is what I use mostly too.
I rarely use piston stoppers as I have seen too much crap caused by them.
If I am to change a clutch I...
Blocking piston is the absolute last resort as it put strain on rod/piston/bearings.
Better is to tap/knock them off.
346 often break crank inside threads and knocking them is sometimes not easy if wrong tools are used or clutch is bad.
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