Tuning carb with a Vacuum Gauge

[RyansToy]

So I bought a vacuum gauge at Princess Auto (canadian harbour freight equivalent). to try and tune my carb.

I am not very familiar with the vacuum gauge uses.

My vacuum seems to tune in around 18-19 in Hg. It does vibrate a bit.

Is this normal, or should I be looking at "spark plug gaps, distributor, coil"... as seen on some online things. Click the image to see the video.



http://vid14.photobucket.com/albums/...psik3aezrk.mp4