does my starter have a ground ford f250
What motor? IIRC for that era truck, with a gas motor, Ford used a fender-mounted Starter Solenoid and a Starter. The switching takes place in the Solenoid, so no, you shouldn't see a ground on the starter itself. Newer, one-piece Starter/Solenoid assemblies actually have an integral ground that connects the solenoid to the starter, which provides the ground because it's a big hunk of metal bolted to an even bigger hunk of metal. Plenty of surface area to provide a ground once the engine itself is grounded to the chassis.
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