john deere b hot coil

rcorf · Feb 23, 2017

Looking at buying one ove the 12 volt hot coils for my 1951 b with delco dist it states you can gad plugs wider has anybody done this how far did you gap the plugs coil is 40k volts just looking for a litle more pop for the b thanks

John T · Feb 23, 2017

Some of those so called "hot coils" draw more current then the old stock coils and if they draw too much over 4 amps the points can burn up prematurely although sure you may have a high energy spark for a while. If you upgrade to a higher current rated electronic switch that solves the problem. I've seen elec switches using HV coils and they run a plug gap of at least 0.035 up to maybe 0.050 or so. However you need good quality HV rated plug wires and a good cap and rotor when you widen the plug gaps to avoid HV breakdown and arcing. Id consider just a good general tune up with new plugs and wires and points cap n rotor versus a HV coil and wider gaps and all that "stuff" if you still use points.

John T

rcorf · Feb 24, 2017

id probly be better off with factory coil thanks

rcorf · Mar 17, 2017

okey some times im stupid tractor ran great spent the money for the hot coil tractor runs like crap put in new points as old ones were burnt put old coil back on runs like a champ what a waste of my money cheap coil for sale

john deere b hot coil

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