So I have three carburetors that I have removed from ms200t saws that weren't running, all zama C1Q-S126. I've rebuilt two of the saws and put on brand new oem carbs, and the other usual rubber bits, and they are running great. As I get more into working on saws I want to learn more about how these carbs work; so I don't just clean them, throw a kit in them and hope for the best. I do know about the accelerator pumps and I'm going to try the "accelerator pump delete" mod, that has been posted on this forum many times, once I can determine the rest of the carb is good. Before I do that I want to check the rest of the carb, from what I understand it is mainly that the check valves are working and the needle seals. I will put in a new carb kit. Here is a photo of the carb:View attachment 20211130_172727.jpg
The main nozzle (one that goes through the body at an angle) I can test with a piece of fuel line over the hole and the high needle closed and air will go through but not be sucked back through, on all three carbs. Is that the correct way to test that valve without removing it? The hole in the center is also a check valve right? I can't get any of these to test. I did remove the welch plug on one carb and it looks like there is a hole from under the plug to that check valve that is letting air through. How can I test this valve? Thanks!
The main nozzle (one that goes through the body at an angle) I can test with a piece of fuel line over the hole and the high needle closed and air will go through but not be sucked back through, on all three carbs. Is that the correct way to test that valve without removing it? The hole in the center is also a check valve right? I can't get any of these to test. I did remove the welch plug on one carb and it looks like there is a hole from under the plug to that check valve that is letting air through. How can I test this valve? Thanks!