ECHO CS 330EVL Vacuum Question?

[seagiant]

Hi,
Was not able to get this Saw tuned up so wanted to check for pressure/vacuum.

Pressure held great but vacuum. I would pump down to 15 then guage would rise to 10 and hold?

Wondering if this normal or what others have found doing vacuum tests???

 

[seagiant]

Hi,
Wow, this must be the place!

 

[Old2stroke]

Hi,
Was not able to get this Saw tuned up so wanted to check for pressure/vacuum.

Pressure held great but vacuum. I would pump down to 15 then guage would rise to 10 and hold?

Wondering if this normal or what others have found doing vacuum tests???

With only numbers to go by we don't know how much vacuum you are using but, yes, the seals will deform inwards under high vacuum and seal again as the vacuum is reduced, usually at a higher vacuum then the crankcase is exposed to.