Honda MC systems are based on the open system as shown in your diagram. As John T points out, the onlyt ground path is the electrode in one plug, through the head aluminum, to the other plugs ground electrode then center electrode, then back to the coil other winding. In fact there is only one winding in the Honda coil with plug wires attached at each end of that winding, whereas your diagram has a connection between two windings (same reality). There is no reason I can think of that would preclude the use of two coils on one set of points in a conventional setup, that is with the center connection in your diagram connected to the points as the primary is connected to the secondary in a "normal" ignition coil. This would allow the ground circuit to be established with one wire off the plug and not grounded. This might also explain why the removal of the non operating (fowled) plugs wire might allow the other to operate due to opening a shorted secondary. Just thinking. Jim
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Today's Featured Article - New Hitches For Your Old Tractor - by Chris Pratt. For this article, we are going to make the irrational and unlikely assumption that you purchased an older tractor that is in tip top shape and needs no immediate repairs other than an oil change and a good bath. To the newcomer planning to restore the machine, this means you have everything you need for the moment (something to sit in the shop and just look at for awhile while you read the books). To the newcomer that wants to get out and use the machine for field work, you may have already hit a major roadblock. That is the dreaded "proprietary hitch". With the exception of the
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