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| | | | Joined: Nov 2002 Posts: 2,763 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,763 | I am often asked what is the float setting for Zenith carburetors. The standard answer has been (and this is published in some Zenith literature) "if one installs a new float and new fuel valve, then the float is properly adjusted".
Was reading through some obscure confidential Zenith bulletins yesterday, and actually found some printed measurements for Zenith float settings. The ones normally used by members of this forum would be the downdraft series 23, series 28, and series 228 carburetors.
With the float closing the fuel valve, the distance from the BOTTOM of the float to the casting surface WITHOUT gasket:
23 series - 1 1/2 inches
28 series - see edit below
EDIT: the 1 21/64 previously posted should be 1 31/64.
This bulletin was written before the 228 series was released, so no additional information on the 228 series.
Jon.
Last edited by carbking; 04/10/2015 1:14 PM. Reason: Error
Good carburetion is fuelish hot airThe most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes!The Carburetor Shop | | | | | Joined: Sep 2008 Posts: 872 Shop Shark | | Shop Shark Joined: Sep 2008 Posts: 872 | What is the source of that 1 21/64ths?
My book says 1 31/64th +/- 1/32 for 28 and 228 series Zenith carbs.
One book specifically reference the 228s
Another book is pre-228s (28 Series).
None of them call for 1 21/64
| | | | | Joined: Nov 2002 Posts: 2,763 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,763 | The 1 21/64 is in the book of old age and crooked fingers!
Sorry.
The correct figure is 1 31/64.
Jon.
Good carburetion is fuelish hot airThe most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes!The Carburetor Shop | | |
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