1991 mercruiser 502 how much torque on rocker nuts

[Tahiti warrior 502]

I'm having a hard time figuring out what the torque specs are on the rocker nuts on a 502 Chevy any help would be appreciated

 

[alldodge]

No torque spec, its 1 turn after zero lash

Ensure each valve is under no tension from cam, then turn adjusting nut down while rotating push rod and moving it up and down. The up/down is what your feeling for, not the rotating the push rod. Once there is no up/down movement, turn rocker nut on additional full turn