bdl1801

The crank key appears to be good and holding its position. I hooked up a timing light and turned it over with starter and the timing fired off at the F mark. I just ohm tested the igniter unit and found it did not meet spec. I figured with a bad igniter unit I would not have spark at all. What exactly does this Igniter unit do?

I just bored out my 87 Bayou 300 .020 over and installed a new oversized piston and had the valves vacuum checked. With everything back together and after setting timing and cleaning carb I am having a problem with it trying to start. When the engine turns over it will pop as if it is trying to fire off but will not run. I have about 125lb compression I have fire and I sprayed fuel in carb with these it should at least try to run. The only thing I can think of is a timing issue. I have lined the cam sprocket up with klf300 and set accordingly to the to the T mark on the alternator rotor. I have taken it off and double checked it twice I have even set it one camchain link forward and then aft of the correct Top setting at the camsprocket. I have set the valves to spec. When I turn the engine over by hand the valves open and close like they should at the right interval and the piston is at top dead center when aligned with the T mark and cam sprocket are in there right positions. Can I use a timing light when I try to start the engine and check for correct timing? I read something about a timing advance not sure how that works. Is there a sure way to check exactly when the engine fires?