I got a 170 for my grandson last year . I’m having a idle problem. The cable going into the top of the carb is loose. If I move the cable it will idle goes back to normal. Once I press the gas pedal again I get high idle, move cable its ok. I tightened the cable on top and the cover. I don’t want to turn to hard and break it. I still have to lift up on the cable to get it to idle right. What I’m I getting into if I take the cover off the carb? Thanks for your time…