1990 Johnson Evinrude "ES" 60 thru 70 Service Manual, P/N 507873, Page 296Get this manual
Trim Sending Unit Adjustment It might be necessary to adjust the trim sending unit to coincide with the trim gauge at full position To do this, proceed as follows: 1Turn ignition key to the ON position2Raise the engine with the tilt switch to maximum trim-up position
1321 Move the angle adjusting rod to the center hole1331 4Loosen the sending unit screws until only snug,
the sending unit can be pivoted
5Lower the engine all the way down against the angle adjusting rod