1983 Yamaha 30EN Outboards Service Manual, Page 157Get this manual
Connecting the shift and throttle cables to the engine 1Insert the throttle cable outer wire into the throttle cable bracket, and install the cable joint on the throttle control attachment2Like the throttle cable, connect the shift cable to the shift lever
Final check and adjustment
1Shift the control few times making sure that the motor shift lever stops in its three positionsThe movement of the control lever should correspond with the movement of the shift and throttle levers at the motorThe motor shift lever position must be determined by the control cable only and should not be jammed against forward or reverse stopsAdjust the shift cable terminals (at the shift end first) until proper operation is obtained2When the throttle cable is correctly adjusted, the engine speed will remain at idle while the control lever is shifted, and will increase only when the control lever is moved beyond the shift detentAdjust the throttle cable terminals (at carburetor end first) until proper operation is obtained3The control lever should operate freelyAny stiffness is usually attributable to excessive cable bends, tight motor linkage, or improperly adjusted terminalsI necessary, readjust the cable term inals to match proper travel for the levels of the motorConnect the wire harness to the coupler aligning the marks on the coupler