Crafstman Engine Analyzer..., how to connect? 20% points? Options

[yarin]

I bought this nifty device, last one on the shelf already opened/returned but it doesn't have an insruction manual with it.

I hooked up + and - to the battery, and the green aligator clip to the negative side of the coil.

With the car off it reads 60 on the 4 cyl scale. With the car running it reads 30? I moved the point closer to the rotor and it now reads 20 with the car running.

Is this device messed up or is my dwell angle really messed up.

[Dr. Roger]

First thing you should do is calibrate your dwell meter. Usually by touching the leads together and, using the adjustment screw, set it to zero or 100. Which ever end of the meter it goes towards.

4 cylinder engines should be in the...

Single point:
Point Gap-------Dwell (each)-----Dwell (combined)
.018"-------------34°---------------34° ± 2°

Dual point:
Point Gap-----Dwell (each)-----Dwell (combined)
.022"-----------32°---------------41° ± 2°

Too much dwell can cause a late spark, rough running, lack of RPM potential, early point and condenser failures.

Too little dwell causes a weak spark, overheated points, "stuck" points, poor engine performance, and makes your winky shrivel. (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)