In Reply to: hard starting posted by Doug in Maine on December 19, 2017 at 21:02:46:
You first say 'strong spark' then answer Bruces' question about spark gap, "...I didn't try that...". How did you determine the spark was good without testing? Heating the oil isn't the problem unless there is water in it, but then you have other problems if so. You need a good strong fully charged battery to crank the engine over with. You need AMPS to crank the engine over with. How old is your battery? Take it to your local trusty starter/alternator shop and they will bench test it with the proper equipment. You just can't put the battery on a charger and think it is good. The battery must sustain a charge under load. I seriously doubt your flywheel ringgear is 'worn'. Next, how did you check fuel flow? Then, what kind of 12-volt conversion is it? Look at Wiring Pictograms by JMOR in our HOW-TO's forum, subcategory ELECTRICAL. He has created a document that shows every CORRECT way to wires these old N's whether 6 volt or 12 volt. Start with the basics, baby steps, and don't 'guess it must be this' and start replacing parts.