This is a county line trimmer with a Briggs 675e series engine. I am still working on getting it running, as it will fire but not stay running. I have put a new fuel filter, bulb, and carb on it and have been careful with the gaskets, new plug and obviously have spark. It you look at the pics, does the spring look right? Because if I move the throttle control on from “turtle to rabbit” I don’t see a drastic change or movement. I also don’t see a second spring like an air vane spring but maybe there is not one on a trimmer like this. Any thoughts would be appreciated!