Question
I had an area handyman (who is no longer in the area) replace some residential lawn sprinker heads, and he did not replace them with the Hunter type heads that I already had.  He replaced them with K2 sprinkler heads, and since I don't have a manual for them, I have not been able to figure out how to adjust the radius to the minimum, which I beleive is 40 degrees.  It is now set on 180 degrees, and is watering a brick wall.  Any help will be appreciated.  Thanks.

Answer
I got this off the Krain web site.  Sorry about the delay, I thaought I had answered your question a while back.

Sprinklers & Rotors

Q: How do I set my sprinkler?

A: To preset the arc adjustment:

1.) FIND THE LEFT START POSITION: First rotate the turret with your fingers around to the RIGHT (clockwise) until it stops. Then, rotate the turret around to the LEFT until it stops again. This is the LEFT START position. The sprinkler will begin spraying from this point and will rotate clockwise.

2.) To change the arc setting:

To INCREASE THE ARC, insert the K-Key into the arc indication ARROW SLOT at the center of the turret. While holding the turret with your fingers (so that it doesn't rotate), turn the Key CLOCKWISE, until the arc indication arrow points to the arc desired.

To DECREASE THE ARC, hold the turret, and turn the Key COUNTER-CLOCKWISE to the desired arc setting. ( IMPORTANT: DO NOT TURN THE ARC INDICATION ARROW PAST THE 360 SETTING OR PAST THE 30 SETTING )

3.) TO ADJUST THE ARC WITH THE SPRINKLER ON: If the sprinkler is turning to the right, hand-spin the turret to the right until it stops. Then, turn the turret to the left until it stops again. THIS IS THE LEFT START POSITION and you can now turn the arc indication arrow to the desired setting. ( See TO CHANGE THE ARC SETTING ) If the sprinkler is turning to the left, hand-spin the turret to the left until it stops. ( See TO CHANGE THE ARC SETTING ) IMPORTANT: DO NOT TURN THE ARROW PAST THE 30 SETTING OR PAST THE 360 SETTING.