i have a merc 140. the shift interrupter switch should kill the engine for a split second. that i do know. i have it sent with a volt meter when i move the v shaped plastic manually. i have had luck in the past doing it that way. my problem is when i use the lever to put it in gear it wont move the v shaped plastic. i can see the cable and everything move but it looks like it has to much travel in the tube. does it sound like i need to shorten the cable?