Zenith 35/40 Data and Adjusting Table

Type	220Sb		230 230S 230/8		250S 250/8 Sedan (2.5 ltr)		250/8 Cp (2.8) 250/8 Sd (2.8) 280S/8 Through 1971		250 Cp 250 Sd 1972
Carburetor Barrel	1st	2nd	1st	2nd	1st	2nd	1st	2nd	1st	2nd
Venturi "K"	23	27	24	28	24	28	24	28	20	28
Main Nozzle "GG"	X112.5	X120	X115	X120	X115	X125	X115	X125	X100	X130
Air Correction Nozzle "A"	100	150	100	130	100	120	90	110	180	110
Emulsion Tube "s"	4S	4N	4S	4N	4S	4N	4S	4N	K30584	4N
Idle Fuel Nozzle "G"	45	-	45	-	45	-	45	-	45	-
Progression Fuel Nozzle	-	50	-	60	-	60	-	80	-	70
Idle Air Bore (mm)	1.5	-	1.3	-	1.3	-	1.3	-	1.4	-
Progression Air Bore (mm)	-	1.0	-	1.0	-	1.0	-	1.0	-	1.0
Quantity Injected (c/c)	0.8-1.2		0.7-1.0
Start of Injection	5 deg off idle		Immediately
Float (mm)	18-20		21-23 with Solid Needle pin / 18-21 with spring-ball needle pin
Fuel Return Valve	Valve Pin Fully in at 2000rpm								No Adjustment
Vent Valve (mm)	2.8 (2.5 mm Minimum)								No Vent Valve
Choke Gap (mm)	2.6		2.4		2.0-2.2
Choke Fast Idle Speed	220-2400 rpm with Vacuum Advance (Ground cable of switch in thermostat housing)
Choke Cover to 1970	Index Marks aligned on both carburetors
1970/1971	Align index marks on front Carburetor --- Rear remains 5 mm towards Rich
1972	Align index marks of both carburetors at second service
Vacuum Throttle Control	Adjust at idle: Hose off 1100 to 1200 with screw - hose on 0.1 mm clearance with spring
Idle Lifting Switch	Test Light at Outlet of switch: Out at 1400 to 1600 rpm

Data and Adjustment Table Zenith 35/40