Re: Mercury control diagram needed
Two hints:
Check the gear shifter cam (part #36) VERY carefully for wear, the two little "nubs" at the top of the heart-shaped (tomato-shaped?) cutout like to wear away / break off, and then it won't shift.
"Glue" the detent roller and spring (parts #2 and 3 in diagram) into place with vaseline before reassembly. (Betcha those are the parts that fell out!)