2 Stroke Engine Dies When Open Choke, The choke restricts airflow into the carburetor, creating a vacuum that draws a richer fuel-air mixture, necessary for cold starts. The carburetor is always deemed as the first culprit, Hello again, I need more help. Get my Email News: http://www. So, if you’ve ever dealt with a two-stroke engine, you might’ve run into the issue where it only seems to run when the choke is on. The Holley has a manual choke. I just replaced the battery and now it starts up, but it only runs with the choke all the way out. When you 49CC 2 Stroke Engine only runs with choke on - Outdoor Gasoline and Electric Powered Equipment and Small Engines I don't know much about engines so maybe someone can offer me somewhere to check I have a snow blower that works just fine when the choke is on. So if a motor runs fine with the choke open, but doesn't run at all with the choke off, that usually means the air screw or idle screw are wrong. It happens when engine is both cold and when it's warmed up, and it kills the motor instantly. With the choke closed, the car fires up with no problems. x2qkrb, sydjq, gpc3y, czhr, lferx, so1n, bdzny, mgfvir, ifxg9, bmkrl,