When I recently purchased my 85-300D, felt like the throttle pedal had to be pressed half way before anything happened..

Thought it was normal until my more experienced friend showed me the linkages & I could see then that there was around an inch of play in the linkages from the pedal before the rod that actually increases the revs.. engaged.

Ended up eyeballing the whole setup & took out all the play to where I had pretty much instant throttle response & felt like a whole diff engine..

Then I ended up seeing in the FSM that there was a detailed procedure for setting up the linkages.

Though my engine seemed to be wonderful after taking all the play out of the linkages, what kinda things can go wrong not doing it right?