no reverse?

[mgee]

I have reverse when tested on trailer. got into water & had no reverse? Could it be a stretched cable? Can't even force it

 

[Chris1956]

Gee, why not repost this in the MerCruiser forum and tell them big block Ford/Mercruiser drive.

Did you check the shift boot, if you have one? Corroded cable can restrict their movement, and the rest of the linkage can bend a bit to cover it.