OK so I have a 2002 Bass Tracker 175 that has a Mercury 40 on it. My issues is that at idle it only runs for a few minutes and dies out. Its like it runs through whats been primed by the primer bulb and thats it. However, it will run at speed with no issues at all, it's only when idling or low throttle that it dies out. Now I've had the pickup off and swapped the anti siphon valve as well as the fuel line from the tank to the primer bulb. The bulb and fuel line to the motor has also been replaced. The quick connect to the motor was replaced last year as well as the carb gone through. I've recently taken off the fuel filter and gone through it as well. Ive even tried cranking it and running it without the fuel cap to see if would stay running, still nothing.. As I'm priming it I can't see any leaks or hear any air. Not really sure what this could be, any help here would be appreciated!