With the distributor ignition, there is a set of weights and springs that (like a governor) advances the spark as RPM increase. The distributor shaft is 2 piece. The drive end is turned by the shaft in the drive housing, and remains timed to the engine through the cam drive gearing. The distributor cam and rotor shaft are fitted over this shaft and rotated with the above mechanism of weights and springs to do the advance. In a mag (found on a Letter series from the factory) the initial timing is TDC, happening when the impulse coupling trips at starting or hand cranking speeds. At Idle or above the advance is full advance at all times. This leads to moderately rough running at idle speeds from excess advance, but the tractors were designed to be wide open 90% of their lives. Jim
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Today's Featured Article - Torque Wrenches - by Curtis Von Fange. When working with fasteners a torque wrench can play an important role in the correct assembly of critical equipment components. Lets examine in detail some of the reasons for using a torque wrench along with how to correctly use the variety of wrenches available. Applying the proper torque to a fastener accomplishes a number of tasks. First of all correct torque will hold the parts together. This may seem like a trite statement but � think about it for a second. Engineers have designed
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