Join Date: Mar 2016
Location: Lake Mary, Florida
Re: Wiring ProForm 66256 Starter
If you have a points type ignition, then the yellow wire from the "R" post of the starter (if marked as "R") is needed to the "+" side of the coil to provide a straight 12 volts while the starter is cranking the engine over. Once the starter is disabled, this 12 volts from the yellow wire is disabled, and voltage to the coil comes from a resistance wire (fabric wound) from the ignition switch. This fabric wound wire from ignition switch is a "resistance wire" designed to lower the voltage to the coil to help in keeping the points from pitting. this voltage is around 8 to 9 volts during engine run. When a cold engine is being started, a full 12 volts from the yellow starter lead during cranking (starter) provides a slightly hotter spark. Some folks will run a wire from a battery to the coil; this works, but it can cause the points to pit, and require more frequent changing.
So, if you have an HEI distributor (or some other non points ignition system), the yellow wire is not required. Some starters that are bought today don't come with the "R" lead, as they are replacement starters for HEI equipped ignition engines.
I'd follow the directions of the manufacturer/tech line recommendations as to how to hook up the wiring.
Never argue with an idiot; they'll only drag you down to their level, then beat you with experience.
Last edited by bucko; Dec 19th, 18 at 04:37 AM.