My interpretation of run on is that the engine continues to run after the ignition is shut off due to spontaneous combustion in the cylinder.
Causes
Loose Carbon in cylinder
Excessive heat in cylinder combined with low octane fuel.
throttle plate open to far due to idle stop set to high.
Timing to advanced has NO effect
Timing to retarded only has an effect of causing excessive heat in cylinder
Ignition circuit has no effect
Discussions welcome.
Causes
Loose Carbon in cylinder
Excessive heat in cylinder combined with low octane fuel.
throttle plate open to far due to idle stop set to high.
Timing to advanced has NO effect
Timing to retarded only has an effect of causing excessive heat in cylinder
Ignition circuit has no effect
Discussions welcome.