As you all may have been reading,I've had a problem with getting spark on my 450 using a chip.Normally I use a thinner one wire chip because in a lot of applications there isn't enough room for the thicker Nova chip.This time was an exception,I was able to use the Nova chip,but I needed a longer screw to put it where the condenser was.I got lucky & found a longer screw,but after I got the saw all put back together it ran like a turd.The Nova chip has 2 wires which if you're not aware,you can reverse the polarity & not know it.This happened to me today.Unfortunately I ran out of time & wasn't able to pull the recoil & flywheel off again to reverse the wires & put it back together again.I was just elated that I was able to finally get spark back on the saw again.Originally I connected the wire from the chip to the points stud & had the points set wide open.Apparently this can't be done.I'm not an electrical genius,so it's live & learn..
On a slightly sadder note the 1-75 is in need of crank seals,I can't hold a tune on the saw to save my life.I also found out that the plug it had in it was no good.Another problem that keeps cropping up is the throttle linkage likes to come unhooked from the carb causing it to run WOT.