Originally Posted by
lpugh
Are they Mercury Plugs and wires?
Pick up a ajustable air gap spark tester, most parts stores have them and they are cheap
While it is in a no start condition start with a 3/8 air gap and check for spark on all cylinders, if no spark reduce the air gap to 1/4 and check again
I do not know the coils output on this motor so can not be specific on the proper air gap to test at. I am fairly sure though that bridging 1/4 gap would be more than enough voltage to start that motor
How about it, does anyone know the does anyone reading this know the KV ouput for this motor
If still no spark keep reducing the gap untill there is a spark to determine available voltage
Something I would do right away is check the crank sensor air gap as I recall about .020 to .050 and set it towards the minimum instead of maximum. While at it, OHM test as well while in failed state 300 to 350 ohms I think is correct, If you have a spark you can skip testing the crank sensor as that would be proof that it is working
I would also have a can of carb cleaner with me (NO STARTING FLUID) if it had good spark try opening throttle first, then try a little carb cleaner, maybe about a 2 sec burst and try again
We need to determine if this is electrical or a fuel problem. If it fires up on the carb cleaner it may over rev, be prepared for this. Do not overdose it with the carb cleaner, all we are after here is to find if you need more or less fuel for starting