Johnson Evinrude Outboard Motors 1956-1970 1.5-40hp repair manual., Page 234Get this manual
ACCESSORIES
rear of the box considered "warmup" leverThis warmup lever may be adjusted for low and fast idle speedsThe pushbutton type locks out the shift lever to prevent shifting if the throttle is advanced too far while the engine is in neutralThe old style mechanical shift boxes were very simple in designThe lower end of the shift lever handle incorporated rocker-type arrangement with teeth and nylon sleeve-type slider with teethAs the handle moves, the rocker "walks" in the teeth of the slider, pulling on the inner throttle cable or the shift cable, for shifting or advancing the throttle, depending on which lever is being actuatedSeveral accessories have been added to the updated mechanical shift boxThis new box still uses the two lever principle for the throttle and shiftA friction feature on the throttle mechanism permits the operator to release his grip on the lever handle without the throttle changing positionAn idle stop is also built into the shift boxThis feature prevents the throttle from being retracted past normal idle to the point where the engine would shut down