e tec 50 evinrude e tec is the best of both technologies it provides the quiet efficiency and cleanliness many customers associate with the 4 stroke outboards bined with the torque throttle response quick acceleration and raw power associated with the 2 stroke outboard johnson evinrude outboards all in line engines 2 4 stroke 1990 01 seloc s johnson evinrude outboard tune up and repair manual seloc on amazon free shipping on qualifying offers seloc marine tune up and repair manuals provide the most prehensive authoritative information available for outboard to have your stratos added to this list click on add a boat fill in the form and hit submit your boat will be added asap to add a photo s to your listing e mail me a jpg file how do i adjust the idle speed rpm on an evinrude 90 hp outboard boat motor johnson boating question