At the risk of sounding like a complete newbie, can someone please explain the procedure (preferably with photos) for measuring the vacuum/pressure of a chainsaw. I'm currently working on an MS201 so it would help if it was specific to that saw. The compression seems reasonably straightforward with, I assume, an adaptor screwed into the sparkplug port. For the pressure/vacuum do I need similar adaptors to fit the inlet and exhaust ports?
Newbie needs help
- Thread starter Cogito
- Start date
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Dennisthemenace
ArboristSite Operative
Yes
Adaptors not needed in most cases. You just need a piece of fairly stiff rubber between the engine and carb and between the engine and muffler. I made a connector from an old spark plug to apply vac and pressure through the spark plug hole. There are lots of posts here on this subject. What saw are you working on?
I have used old inner tube, have also used gorilla tape. You can leave sparkplug in an test through impulse line.
copen
ArboristSite Member
YouTube can help. Got some knowledgeable folks that can help you with a tutorial on how it's done.
Mity-Vac is a big help for providing pos/neg pressures.
