How do u set the throttle cable for 1980 115hp Johnson or for all Johnson n evinrude beginning from 1977 to 1990. Is it a certain amount of turns. I have no problem setting the shift cable at all it's just the throttle part I'm having trouble with. When ever I set the idle it's perfect and when u put it in gear it gets on plain. It's just when u put it pack in neutral it's idle up high again. Whenever I set the advance timing or idle screw when it's in forward gear it comes out perfect until u put it back in neutral then it's idled high again,if u set the idle back where it suppose to be and put it in forward gear then it won't hardly go unless u give it a little more throttle so now u have to put it back in forward gear and set it over again. So it's back and forth back and forth trying to get it set right. I'm thinking it had something to do with the throttle cable knob that u can turn by hand. I don't know please help thanks. Ps. To set adjust the timing a little wouldn't u use the idle screw thinggy right above the cam on the top left side?