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Farmall & IHC Tractors Discussion Forum
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6volt booster coil

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William C. Owen

08-27-2003 09:08:45




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I have a International 300 pos.to grnd.when I first hooked up the booster coil I hooked it hot wire to pos.post,found out later that it should be hot wire to neg. post.No fire to spark plugs. voltage to coil ignition switch on. I'm putting in new points and condenser.I'm getting 6 volts from center wire from coil,but it shows no voltage coming out when i spin the engine,icnition switch on.Getting 6 volts to neg.post,and 6 volts to pos.post,also voltage right to points. should I be getting 6volts from the center wire of booster?

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Bob M

08-27-2003 10:30:55




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 Re: 6volt booster coil in reply to William C. Owens, 08-27-2003 09:08:45  
I presume when you say "booster coil" you mean you've installed a new hotter ignition coil?

Anyway your observed voltage readings are normal except you should see 0 volts at the coil terminal that connects to the distributor primary wire (the wire that goes to the points) when the points are closed. If not, either the points are out of adjustment (not closing fully) or there's a piece of insulating junk on the points so they don't conduct when closed.

Tip: If you are measuring voltages with a DVM (digital volt meter) DON'T try to measure the voltage from the coil center terminal! When the coil is working it can throw 8,000 volts or more - sufficient to instantly fry many DVM's.

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