Answer to: My Kitchenaid mixer won't start.If I have correctly identified the type of mixer you have, here is a link to the Service Manual: http://www.kitchenaidparts.eu/documents/...-manual/classic-svc-manual-new-email-version.pdf
Answer to: Will not turn offI have fixed this exact problem before. The speed lever linkage has a spring which stretches from the inside of the housing to the bottom of the Control Board (CB) . This pulls on the bottom of the CB keeping it pressed against the piece which pushed it out as the speed is increased (thus returning it back again as the speed is reduced and/or turned off). The problem comes in when the spring pull overcomes the stops (notches) which hold the speed slider in place at each setting. There is a screw which can only be found when the motor housing is opened and which holds the speed lever linkage in place. If this (internal) screw is loose, the slider will not properly engage the stops and the spring pulls it out of the off position. If this screw is still tight and the slider still does not engage the stops properly, then the slider needs a slight bend to encourage it to engage the stops with a bit more force. The Service Manual shows the whole assemble and can be downloaded from: http://www.kitchenaidparts.eu/doc...
Answer to: Why won't my mixer will not start in the off position.?The only problem with the KitchenAid micer Service Manuals is that they do not address any models prior to those which have the solid-state speed control. The K5-A used a wire-wound voltage divider which is no longer made. The on-off switch was also very different. There were two types of these switches. The first version was a toggle switch with a forked toggle. A pin on a lever engaged this toggle and turned the motor on and off. The mounting position of the switch affects how well the turn-on function works. The second version used a "micro switch" which was also lever actuated. These almost never need adjustment. Therefore, I assume that your mixer has the first version of the switch. You will need to open the mixer motor housing up. This is described in the Service Manual. But, since current mixers use an entirely different switch, it is of no help there. Anyhow, once it is opened you will see the switch and it is a matter of loosening the nuts which hold it to the bracket and adjusting the switch back a...