There is one microswitch bellow pedal for forward and one bellow pedal for reverse. And there is a rotary position sensor 0-5 V linked with levers for throttle, who drives one step motor which fisicaly move lever and control how much rpm's will engine deliver. I replaced brushes on step motor and he works fine now. The only way to adjust idle is to adjust lever lenght and increase it a bit. Everything else goes from one control box located below fuel tank. Tommorow i try to adjust idle and see if this can eliminate that suddent start. If anything else you want to add please do. So far you helped me a lot. Thank you very much.