well, here is how I time an F series mag to engine. loosen all 4 spark plugs and remove #1. Turn engine over until you feel it coming up on compression on #1. STOP. Take a 1/4" wood dowel rod, and place into plug hole, until it rests on the top of the piston. continue turning engine over until you FEEL TDC. If you overshoot, no crisis, just turn the engine backwards a little. When you are sure you are on TDC, then take the mag, and using a finish nail (10p works best for me), insert it into the oiler on the face of the impulse cover until you catch the impulse pawl, and hold it up. If you have the older style mag, there will be a little tab that you can pull up on to disengage the impulse. you can now spin the mag drive without the impulse engaging. make sure the spark advance is in the full retarded position.
Now, with the distributor cap off, rotate the drive until the center the brass insert in the rotor is oriented to the #1 plug wire post on the cap. Without disturbing the position of the mag, now place it on the mount about 1" away from the drive on the governor. Take out the 2 1/4" bolts holding the coupler on the governor drive. Slide the mag and the coupler disk over until it meets the governor drive. Rotate the coupler on the governor until the mag, coupling disk, and governor drive all engage. Locate the 2 holes in the governor coupler that you can thread the 1/4" in bolts into without moving or disturbing the orientation of the mag. They should be 180 degrees apart. Tighten bolts and install mag mounting bolts.
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Today's Featured Article - The Fordson F Ignition System - by Anthony West. A fellow restorer contacted me earlier this year asking for some help and advice on a model F that he was restoring. He had over a period of months spent a fair amount of his hard earned cash on replacement parts for the old "trembler" ignition. Sadly though all his efforts seemed to be a waste of time and money as he still couldn''t get the temperamental old thing to run correctly!! If i said that this was a little frustrating for him that would be "conservative" in fact the problem had reduce
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