Weak spark.

Started by AdamPerry, June 16, 2003, 08:21:29 AM

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AdamPerry

June 16, 2003, 08:21:29 AM Last Edit: January 01, 1970, 12:00:00 AM by AdamPerry
My Oliver suffers from a weak spark even after I replaced the plugs, plug wires, points, condenser, cap and rotor, and the coil.  I'm wondering if I could simply slap on an external 12 volt coil for a stronger spark.

John Schwiebert

#1
June 16, 2003, 11:19:56 PM Last Edit: January 01, 1970, 12:00:00 AM by John Schwiebert
Explain this to me, Doesn't your Hg have a mag? A 12 volt coil is designed to be used with a distributor and the difference between a 12 volt and a 6 volt coil is that the 12 volt has a rsistor inside the coil to cut it down to 6 volt. Do you have a good blue spark at the points What point gap are you setting the points at and do you have a mag or a distributor?
John Schwiebert

AdamPerry

#2
June 19, 2003, 07:57:58 AM Last Edit: January 01, 1970, 12:00:00 AM by AdamPerry
My Oliver has an International Harvester magneto, or maybe it's a distributor.  I don't know how to tell the difference, but would like to.  I've played with many automotive distributors, but never any magnetos.

Terry Welshans

#3
June 27, 2003, 12:15:10 AM Last Edit: January 01, 1970, 12:00:00 AM by Terry Welshans
Adam, our OC3 also had an IHC type H-4 magneto when we got it, and it too suffered from a poor spark.  I asked the good folks at Standard Ignition and Magneto in Chicago about the correct mag and they said a Wico 1113 or 1337 would be perfect.  They said the H-4 mag has the wrong advance for our engine.

I bought a new Wico for $275 and it sparks like crazy, starting very easily and running great now.  They threw in a set of solid wires and the push-on ends for free, too!!
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