1. no_tach_drive.JPG ...  Engine without tach drive, adapter showing

2. tach_culprit.JPG ... Reason it quit, broken pin ($10)

3. tach_drive_1.JPG ... tachometer drive on engine

4. tach_drive_2.JPG ... tach drive on engine, fan removed

5. tach_drive_parts.JPG ... tach sender, angle drive, and 2 drive parts