1998 Johnson Evinrude "EC" Accessories Service Manual, P/N 520213, Page 115Get this manual
Trim Sending Unit Adjustment 1Tilt the engine and engage the mooring bracket
2Temporarily, install PI 436541 thrust rod in the No3
3Loosen the sending unit screws until only snug, so the sending unit can be pivoted
4Disengage the mooring bracketLower the engine against the thrust rod
5Observe the trim gaugeIf the needle does not show center positiontilt the engine up and adjust the sending unit by pivoting it up or down6Lower the engine against the thrust rod to verify adjustmentRepeat Step 5, if necessary