Posted by rvirgil_KS on January 03, 2009 at 11:58:32 from (65.171.114.162):
In Reply to: Re: 460 problems posted by CNKS on January 03, 2009 at 09:08:48:
Assuming the 460 ignition is same as 560 the resistor may serve another purpose in addition for voltage drop from 12 to 6 volts.
Looking at Bob M diagram for a 560 (do a search, they are often referred to on this site) there is a wire from junction of coil/resistor going to an "I" terminal on the start solenoid. This bypasses the resistor when cranking to give a hotter starting spark.
If the resistor is open the engine will start and then die when starter is released.
(I"ve seen this setup on vehicles and tractors of different colors. I believe this is the reason for coils labeled "12 volt external resistor required")
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