Review on IHC 4 Cylinder Ignitor Upgrade: PerTronix 1442 Delivers Enhanced Performance by Adam French

Easy installation. Works perfectly. Tractor starts immediately. Works smoothly. Check out the Pertronix website. You may need to widen the spark plug gap a bit. My tractor manual says 0.023”. I think Pertronix is talking about a 0.07 increase. I actually increased my size to .033" and that seems to work really well. It's also my second device. I burned the first one because sometimes I forgot the key and left it in the ignition, which destroyed the battery. I believe Pertronix also warns you about this on their website. Remember an old tractor where you added an ignition key like mine.