Posted by Janicholson on August 26, 2007 at 13:12:43 from (66.173.50.184):
In Reply to: Farmall 450 LP Coil posted by Albert Pereira on August 26, 2007 at 12:37:06:
From my experience, a standard IH coil will provide plenty of spark. The plugs fire at what ever the gap voltage is. Thus if the gap is at .030 the spark voltage might reach 12,000 at idle, and drop to 6 or 7 thousand at full load. (more air and fuel compressed between the electrodes = easier to fire) if gapped to .040 the spark voltage might rise to 14 or 15,000 before jumping across. Excess voltage above that will not actually make it run any better. If it has higher amps running through the primary, then the flux density will be stronger, and the spark will be both more intense, and last a bit longer. The point life will be reduced, and the fact is that LP tractors fire pretty easily. I would look to the mixture, (or possible distributor shaft wear) for problems. JimN
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