North American Emissions Plumbing - Zenith with Anti-Runon Valve

Hover over a number for the key, click on the menu items below to show the vapour/vacuum routings.

Fuel Flow     Tank Expansion/Contraction     Carb Expansion     Crankcase Breathing     Anti-runon    

Image from Haynes Workshop Manual

Note: On 1978 models a secondary charcoal canister was connected between the anti-runon valve and the air vent pipe.

Fuel is drawn from the bottom of the tank (13) by the pump (20) and pushed through the fuel filter (12) and into the carb float chamber.