Delco 27MT starter I assume. You need to ascertain if the plunger inside the solenoid is sticking . . . or if the contacts in the solenoid cap are pitted and sticking . . . or if the voltage going to the solenoid "S" terminal isn't being cut off. When you turn the key and power gets to the "S" terminal - an electromagnet pulls a metal plunger against a spring that pushes against a rocker-arm that puts the starter drive into the proper place. Once pushed all the way a button is pushed in that makes the copper contacts close and make the armature spin. The starter drive has no "Bendix." It uses a sprag roller clutch that acts like a one-way rachet. As another poster mentioned - if the starter drive gets stuck "engaged" - it prevents a sort of "back-feed" and keeps the power going even if the power is shut off to the solenoid. Delco direct-drive starters have a pretty weak drive-stop at the end of the armature that come off at times. So - your problem can be stuck contacts, sticking plunger, broken drive stop, etc.
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Today's Featured Article - The Rescue of a Fordson F - by Anthony West. Introduction I live in the UK and have for many years restored Fordson tractors (in the main model N's). I have also restored and shown model F's, E 27N's, Field Marshall Series 2, David Brown Cropmasters and the old rey Fergeson T 20. At one time I had seven restored examples which were shown and used in ploughing matches. As most restorers, I have a number of war stories I can relate on a range of topics that may help other like minded and interested people. Perhaps my first p
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