Re: No Spark
it's battery CD To test the system with out a tester make sure you have 12V at the red termanal on the stitch box, then ck voltage on the white term. with he switch on,then with a jumper wire installed between the brn and white wires on the dist. side of the box, ground the blk termanal, if you have spark as you arc the termanal, you have a bad trigger and if you don't chances are its the box, it is in most cases, I have never replaced a coil (tranformer) --bob