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Re: 1950 M ignition starting problem
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Posted by John T on June 26, 2006 at 14:54:01 from (66.244.90.5):
In Reply to: Re: 1950 M ignition starting problem posted by RustyFarmall on June 26, 2006 at 12:34:28:
jpl n Rusty, If he happens to have one of those solenoids with the extra lil (I) terminal (like Ford n some GM used) its hot with full battery voltage ONLY when the solenoid is engaged (its cranking) and thats good for and used when one uses a 6 volt coil with an "External" Ballast Resistor on a 12 volt tractor. What it does is effectively by pass the ballast and apply full unballasted battery voltage to the coil (ie. 12 volts on a 6 volt coil) ONLY while cranking. Thats what some farmers call a "start on 12 and run on 6 coil system"........HOWEVER if theres no external ballast to by pass, the solenoids lil extra lil I terminal (or any other terminal for that matter) dosent apply any more voltage to the coil (assuming switch n all else is okay) then what normally comes from the regular ignition switch feed. HOWEVER if the switch contacts (resistive/carboned/loose) or the switch wiring is bad, the extra lil jumper wire to the coil could help and it cant hurt nuttin so its worth a try BUTTTT its not the normal or factor way, it is the factory way when they use a 6 volt coil on a 12 volt tractor with an external ballast and want to improve the starting spark energy and yessssss it works great. Bottom line is its NOT ordinary but it cant hurt and might actually help as a band aid approach (but he needs to fix the REAL problem) if the switch or wiring has some resistance and is dropping voltage. Fun chat, yall take care n God Bless John T
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