Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
AISAN 2-Barrel Carburetors: Description
Carburetor is a 2-barrel downdraft design with primary and secondary venturi. An automatic choke containing a heated bimetallic spring provides proper air/fuel mixture control during engine warm-up.
Secondary throttle valve is actuated by a vacuum diaphragm unit with a kick-up (open) lever. Secondary valve begins to open when primary throttle valve opening angle exceeds 55 degrees. During deceleration, a throttle positioner opens primary throttle valve slightly to maintain proper combustion of air/fuel mixture.
A thermostatic valve provides air flow under secondary throttle valve when ambient air temperature is high. System helps maintain proper combustion. Other features include choke breaker, auxiliary accelerator pump and deceleration fuel cut.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.