red button on McCulloch chainsaw (Double Eagle 80)


Old 11-01-04, 05:52 PM
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red button on McCulloch chainsaw (Double Eagle 80)

hi everyone-

Having no owners manual for the below chainsaw, I must resort to asking online about this....

There's a strange red button on the side of a couple of McCulloch Double Eagle 80 chainsaws I've just gotten (not running, hope to rectify that ;-)

It screws into a threaded hole going into the piston chamber.
It has what appear to be two positions (in and out)
the bottom end has what almost looks like a tiny valve head and seat.

I have NO idea why you'd have a 'valve-like' assembly that could, in a tiny way, affect the sealing of the piston chamber like this..

Something that's connected to the carburetor (or that area) I could see as being a choke (I know where that is) or something.... but this could only serve to vent the firing chamber

what the heck does this do?

btw- does anyone have a manual they'd care to post the basic starting directions out of?
I don't need a copy - just the notes on how to start it right when it's cold, etc..
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Old 11-01-04, 11:46 PM
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They are compression releases. You open them to allow easy starting. It will close when the engine starts up if it is operating correctly.

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