First thing I would do is get new rubbers for them. That is the boot plus the small sleeve part as they play a big part in it working correctly. Bruce will have them is store. Now it sounds like the one that goes inside the carby isn't in it's hole correctly. As when you go to stop the p position it pushes the one that goes in the carby across so it touches the other pin and as I said the sleeve part of the rubber helps to keep the pin in the right spot so they can touch. Inside the carby on the same plastic part that the throttle cable joins the is a special part which makes the pin move over. So I've found it's best to put that pin in when it is in the stop position. When installed correctly you can see the pin move when moving the throttle control. Hope this helps.
