Re: Universal M18 - stopping using throttle push back
Take a look at the linkage between your throttle lever and the actual cable that goes to the engine.
On mine, there's a T-shaped bell crank type lever that 1.) when straight up it has the cable length in the "idle" position, 2.) when moved forward it pushes the cable on the engine to increasingly open the throttle, and 3.) when moved aft it ALSO pushes the cable to open the engine throttle.
Joe - s/v Assignment, Catalina 320