Service Procedure (Zenith 62/162)
Exploded Views and Diagrams (Zenith 62/162)
High Speed System (Zenith 62/162)
Economizer System (Zenith 62/162)
The 62 and 162-series carburetors are of the single barrel updraft design with double venturi, twin floats and semi-concentric fuel bowl which permits operation at extreme angles without flooding or starving the engine. These carburetors are of the “balanced” and “sealed” type in that all air and idle operation, well venting and fuel bowl ventilation must enter through the air cleaner. Some models include a back suction economizer system to provide lean mixture ratios for part throttle operation and still provide the richer mixture ratios needed for wise open throttle and full power operation. The 162-series uses an “isolated” idle system wherein the fuel for idle is taken well.
The fuel system is made up of the threaded fuel inlet, fuel valve (needle and seat), float assembly and fuel chamber. The idle system is made up of an idle discharge port, idle air passage, idle adjusting needle, idle jet and fuel passage. The high speed system consists of a prmary and secondary venturi, main jet, well vent and main discharge jget. Some models include a main jet adjustment. the economizer system consists of a “milled” slot in the throttle shaft (which acts as a valve), a vacuum passage between the throttle bore and the slot in the throttle shaft and a vacuum passage from the slon in the throttle shaft to the economizer jet which controls the suction applied on the fuel bowl. The choke system is of the semi-automatic type and includes a choke palte with built-in poppet valve, choke shaft and external choke lever.
Type: Updraft
Styles: 62A and 162A - throttle and choke shafts are parallel
“J”: Back suction economizer
“M2”: Marine carburetor with cast iron castings and brass fittings, plugs, etc.
“X”: Flange next size larger than standard
| SIZE | NOMINAL SIZE | THROTTLE BORE DIAMETER | S.A.E. STANDARD FLANGE SIZE |
|---|---|---|---|
| 9 | 1 1/8” | 1 19/64” | 1” |
| X9 | 1 1/8” | 1 19/64” | 1 1/4” |
| 10 | 1 1/4” | 1 13/32” | 1 1/4” |
| X10 | 1 1/4” | 1 13/32” | 1 1/2” |
| 12 | 1 1/2” | 1 21/32” | 1 1/2” |