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.
Air Horn
On carburetors with automatic choke mounted on air horn, see "AUTOMATIC CHOKE " below for disassembly. Remove fuel inlet fitting, gasket and screen. Remove retaining screw and vent valve and shield. Remove pump rod and choke intermediate rod, then remove choke trip lever and fast idle link and lever. Remove attaching screws and separate air horn from main body, then remove float and needle valve assembly. Disconnect intake needle valve from float. Remove intake needle seat and gasket, and remove filter from needle seat bore. Remove power piston by depressing stem and allowing it to snap free (or hold stem and tap lightly on air horn). Remove pump plunger assembly from pump arm, then loosen setscrew on pump inner arm and remove pump outer lever and shaft. If choke valve is to be replaced, remove valve from shaft and slide shaft out of air horn.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.