I rebuilt the carb on my '48 8N. I was trying to dial it in using the method of setting the main jet to 2 turns out, setting the idle mix screw to 1 turn out to start and then adjusting the idle mix screw to get fastest idle with engine warm and at idle.
The problem is that turning the idle mix screw has almost no effect. I get best idle with it turned FULLY in. Seems like I have a problem.
Would damaged threads in the carb body for the idle jet cause this? I did have an issue getting out the previous idle jet, resulting in maybe a 90 degree section of the threads getting damaged. The jet still seems to be held in the center, and I didn't notice any liquid (water) getting past the side of the jet when I checked it before reassembling it.
The problem is that turning the idle mix screw has almost no effect. I get best idle with it turned FULLY in. Seems like I have a problem.
Would damaged threads in the carb body for the idle jet cause this? I did have an issue getting out the previous idle jet, resulting in maybe a 90 degree section of the threads getting damaged. The jet still seems to be held in the center, and I didn't notice any liquid (water) getting past the side of the jet when I checked it before reassembling it.