Posted by Steve@Advance on April 14, 2018 at 08:37:37 from (66.169.147.211):
In Reply to: Converting to 12 volt posted by Mark Taylor on April 13, 2018 at 19:40:18:
As John T explained, there are various types of starter relays. They all look alike, only way to know is to do some investigating.
If both small terminals are in use, try removing the wire from the terminal marked "I" or "R", see if it will still crank.
If it does, that is a "resistor bypass" type, the most common design available at any auto supply. It grounds the relay coil through the base.
If It does not crank with the wire removed, that is an "externally grounded" type. Not very common.
What you need to be careful of, a base grounded relay will work in it's place, but by doing so you may have bypassed the neutral safety switch. Some applications use the ground side of the relay to complete the circuit through the neutral switch.
Another option would be to just leave the 6 volt relay on. It will probably last a long time, replace it when and if it fails.
As for the rest of the conversion, the electrical is really simple, especially if you chose a "one wire" alternator. The kit should have instructions, if not search "12v conversion", you'll get lots of hits, also Youtube is a good source.
One thing to remember, the electrical seems to be the most intimidating area, don't let it!
Apply just as much attention to the mechanical aspect. Properly mounting the alternator, getting the pulleys properly aligned, and the right pulley width, are just as critical, even more so. A shortcut here can result in major damage if an unnoticed belt failure turns into an overheated engine!
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