How do I use an impact wrench?

Which way should it turn when I'm compressing it if I am about to to
use it to unscrew a bolt or screw? Which direction are you looking
from it?


If I push the front of wrench back into the back of the wrench it
turns either clockwise or counterclockwise, when looked at from the
heal of the wrench, depending on the setting. (The opposite of
course when looked at from the tip of the wrench)

Which way should it turn if I want to use it to unscrew a bolt or
screw? Which way are you looking from it?



I'm trying to unscrew the screws holding on the oil filter of my
recently acquired 69 Honda, not run for 35 years. Also the starter
motor cover. So I can clean and oil them respectively.

I have this problem every time I need to use this wrench and I figure
it out, but since I'm over 50, or maybe since I was 20, I can't
remember from one time to the next! This time, I think I have it, but
none of 5 screws will budge!