1966 Ford Mustang Carburetor Information

Ford used the following carburetors in its 1966 Mustang line-up. Below we have outlined some general information on the carburetors in the 1966 Mustang as well as settings and adjustments.

General Carburetor Information

Engine & Trans	Carb	Carb	Throttle Bore		Venturi Diam		Main Metering Jet				Booster Venturi		Pwr Valve		Spark	Choke
	P/N	Model	Pri	Sec	Pri	Sec					Pri	Sec	Norm	Alt.	Valve	Spring
200 1V Std	C5OF-Y	1100A	1.437	–	1.200	–	69F	–	67F	–	–	–	–	–	Plain	TS
200 1V Auto	C5OF-Z	1100A	1.437	–	1.200	–	67F		65F						Plain	TP
289 2V Std	C6OF-A	2100A	1.437	–	1.145	–	51F		49F		CG		Red	Plain	–	TW
289 2V Auto	C6DF-B	2100A	1.437	–	1.145	–	50F		48F		CE		Green	Yellow	–	TO
289 4V Std	C6ZF-A	4100A	1.437	1.437	1.080	1.189	49F	58F	47F	56F	M	H	Plain	Green	–	TN
289 4V Std HiPo	C6ZF-C	4100A	1.562	1.562	1.125	1.189	52F	68F	50F	66F	CF	BA	Plain	Green	–	–
289 4V Auto	C6ZF-B	4100A	1.437	1.437	1.080	1.189	48F	57F	46F	55F	CH	H	Plain	Green	–	TO

Settings and Adjustments

Please note that Idle fuel adjustment – Initial setting all carburetors is 1 to 1.5 turns open. Idle speed setting all carburetors initial settings is 1.5 open turns.

Carb	Choke Spg	Choke Plate	Accelerator Pump Stg		Dry float setting		Fuel level (wet)		Fast idle	Curb idle	Anti stall	Secondary
P/N	Setting	Clearance	Pump lever	Throttle lever	Pri	Sec	Pri	Sec	RPM	RPM	dashpot	throttle plate
C5OF-Y	1 lean	0.130-0.150	0.190	LO	1.090	–	–	–	1400	575-600	–	–
C5OF-Z	Index	0.140-0.160	0.190	LO	1.090	–	–	–	1500 Hi cam	500-525	3.5 turns	–
C6OF-A	2 rich	0.110-0.130	Inboard	3	0.491		0,875		1600	475-500	0.060-0.090
C6DF-B	2 rich	0.110-0.130	Inboard	3	0.491		0,875		1600	475-500	0.060-0.090
C6ZF-A	2 rich	0.110-0.120	Inboard	3	0.531	0.531	0.910	0.910	1400	575-600	–	1 turn
C6ZF-C	–	0.210-0.250	Inboard	3	0.491	0.621	0.875	1.000	–	750-775	–	1 turn
C6ZF-B		0.110-0.130	Inboard	3	0.571	0.531	0.940	0.910	1600	475-500	0.060-0.090	1 turn