I have a 1978 Johnson 70hp and these are the 2 problems I'm having. First, my idle is way to high when in neutral. I know I need to adjust my screws, but I can't get them just right for some reason. Secondly, I have to push my throttle to about 20 degrees before my engine wakes up and goes forward. Even then, it doesn't plane. I told my local marine shop about the problem, but they waon't be able to take my boat in the near future because business is so backed up. I figure I need to either adjust my throttle & shift cables or just go ahead and replace them to save the headache. What could I do to get my boat on the water immediately?