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???

 

[ILENGINE]

15 maybe pulling the crankshaft seals away from the crankshaft causing a vacuum leak until the vacuum gets low enough to reseal. The vacuum testing on Makita was never exceed 7

 

[seagiant]

Hi,
Thanks, I was told at least 15 inches on Vacuum and 7 PSI on Pressure???

Admittedly your theory sounds very good!!!

Thanks again!

I'm now going to look for a Carb problem, tested fuel line and it's good!