Engine will not idle up

[joe1197]

1987 Evinrude 140 E140txcua.
Need to turn idle up a little. Loosened jam nut and turned screw out as per Evinrude service manual. Could see timer base move forward but idle stayed the same. Could the timer base be bad?

[boats.net]

Thats the way to do it, as engine gets older may have to adjust cam roller in tighter agianst follower.