ms200t

[marc laycock]

How do you stop the crankshaft rotating, whilst removing the sprocket and drum assembly.

also what could be the problem when the on off switch will not switch the saw off anyone else had this problem?

[skyhuck]

You need to use the stihl tool, that you put in through the spark plug hole or some starter cord.

[treequip]

Take out the spark plug and either use a piston stop tool or something soft like a length of starter cord in through the spark plug hole to stop the piston.

 

If you use cord be careful not to put too much in.

[tree monkey]

take the starter cover off the opposite side and put a socket on it then youve no chance of damaging the piston or pot .

[spudulike]

Use the stihl double ended piston stop, do not use the metal one. The off switch problem will be the connectors or wires under the front AV mount.

[Mesterh]

Just use an air wrench ,saves a lot of effort.

 

Just remember to undo it clockwise, it has a left hand thread.

[GardenKit]

I always use an air impact wrench to rattle off the clutch, it takes only a few seconds, but of course not everyone has access to one so Spuds method is then the best.

And as he has said, the stop switch problem will almost certainly be the wire between the rear bolt of the front AV , and the bent metal contact spring. It will be broken at the top end terminal.

[spudulike]

Seen a few saws come up non ebay with the crank clutch end sheared off - wonder how this happens:001_rolleyes: (to all the guys using air wrenches)

 

 

But there again - and this bit is important - THE CLUTCH HAS A LEFT HAND THREAD - RIGHTY TIGHTY AND LEFTY LOOSIE DONT WORK - TURN THE THING CLOCKWISE TO TAKE IT OFF or it will be a long day ending in tears:001_rolleyes:

 

Thanks MesterH beat me to it!

[GardenKit]

The air gun loosens the clutch instantly by shock impact. As it is working against engine compression there is a lot of 'give' and the egine would turn long before the crank sheared off.

Any sheared cranks will in my opinion be due to getting the Lh thread mixed up when working against a stopped piston.

I have done possibly hundreds with the air wrench and never had a problem.

[spudulike]

Yes - probably right, mostly occurs on home owner saws:001_rolleyes:

 

Usually use rope on the big uns and the stihl tool on the smaller ones - never wanted to use a screw in stop - had a 262 in where one had cracked the piston crown - nasty:thumbdown: