I have 680 saws (+5-600 in parts and doubles) myself and see many here every week so I see lots of strange stuff...
many broken cranks and pistons from using piston stoppers and other stuff wrong.
I rarely remove starter when knocking them, just off with kill switch or ground coil, then go at it.
Light knocks, there isn't much needed if forces and vibrations are applied correctly.
Were you hold rod and how it sit against clutch is the key rather than high forces. A gently tap ith the...
When engine spin from impact / drills etc.. the dogs go out and starter sound something like: scrowditktakrach. Then it will need reoplacing.
When you knock it it turns half a turn.
No rope, no need to prevent engine from turning if you knock it.
If you run impacts or simular and you don't have a good enough mashine that can nock it of before engine turns it is good to think what can happen and prevent it.
I borrow a buddy's pic and show. I use flat irons..
It is not alway's that simple, but yes, no stuff put in engine that can create issues..
If you have a layer of carbon build up and you stick something to it and apply pressure it will not turn in to diamants and make you a fortune. It will at very best cenario crack and find its way in to muffler...
My favorite rod went missing about a year ago it was a hardened stainless steel rod that in its former life was used to push a valve in a hydraulic maneuvering system. This was just hard enough to not vibrate or split or act up.
It just let the forces go straight thru so it was not much needed...
I usually knock them off.
I have a good metal rod shaped so it works, a tiny hammer and a couple taps and they spin off.
Sometimes the clutch is made in a way it is hard to knock it then I make tools to knock on or use impact.
If so I always look it over first so other stuff won't break.
Air tools and other methods need a sensible mind and experience.
It isn't all machines you can do it on without preparations as it can also create damages.
I do it, it is better and safer for me, but I know what I need to do to make it so...
Problem with piston stoppers is the damage the can do on piston.
I seen several broken pistons due to piston stoppers and often wrong stoppers.
When pressure is applied wrong, piston push to side and damage is a fact.
Even correctly done there is oftan damages in top of piston.
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