Against my better judgement, I am forced to the opinion that rubbing a pencil point across the spark plug gap makes it easier for the current to jump the air gap at low RPM, thus frequently persuading an engine to run that has otherwise proved difficult to start.
Before I am further persuaded to take up arts involving Summoning, please can anyone come up with a cogent, scientific reason why this works.
Regards,
Kim Siddorn,