Tuning Those 2 Barrel Carburetor Adjustment Screws
If your engine is stumbling or idling rough, messing with the 2 barrel carburetor adjustment screws is usually the first place you should look to get things back on track. It doesn't matter if you're working on an old Chevy truck, a classic Ford, or even a boat; getting the fuel-to-air ratio right is the difference between a smooth-running machine and a gas-guzzling headache. Most people get intimidated when they see those little brass needles tucked into the base of the carb, but it's really just a matter of patience and listening to what the engine is telling you. ...