1998 Johnson Evinrude "EC" 90, 100C, 105C, 115, 150, 150C, 175 60 deg. LV Service Manual, P/N 520210, Page 45Get this manual
Throttle Plate Synchronization
1Remove the air silencer assembly
rn 2Loosen the spark lever screw rn 3Push the spark lever roller rearwardrn
4Verify that the throttle cam and cam roller are not touching5Remove fuel filter from bracket and loosen the carburetor link screw9 6
[]] port throttle shaft inhex headscrews .loosen the starboard rn 6Using connector wrench, Do not remove the and
screw from the connector7Seat all throttle platesTighten all throttle shaft connector screws8Carefully tighten the carburetor link screw while supporting the linkage in positionInstall fuel filter to bracket