[AT] Small Zenith carb (CA) question please

[Grant Weir]

Hi John,

   I've found that the gasket surfaces on those old Zeniths tend to warp, 
especially on the top section.  This warpage will not allow the gasket to 
seat properly and gas will suck into the venturi area from the float bowl 
when the engine is running.  File the gasket surfaces down flat or sand them 
flat with some emery glued down to a table.  The gasket is rather thin in 
the area around the venturi and is subject to leakage.  Also, sometimes the 
venturi will hold up the top of the carb lid section causing the gasket to 
not seal.  Bottom line is that sometimes Zeniths are hard to seal around the 
venturi, and that you have to watch this area or gas will suck in.  Hope 
this helps!

Grant Weir
Saskatoon, SK.
Canada



>From: John Wilkens <jwilkens at eoni.com>
>Reply-To: Antique tractor email discussion group 
><at at lists.antique-tractor.com>
>To: at at lists.antique-tractor.com
>Subject: [AT] Small Zenith carb (CA) question please
>Date: Tue, 29 Jun 2004 11:30:01 -0700
>
>The CA is running rich--blowing black smoke.  I put two sizes smaller main 
>jet in (.24) and set the float level a little lower (float valve is not 
>leaking) and it still smokes and fouls plugs.      Then I put a Zenith carb 
>from a Wisconsin engine on it (same size main jet) and it runs fine--no 
>black smoke--but the linkage is all wrong for use on the CA.       
>So.........does anyone have a clue as to what might be wrong with the 
>original carb??  Could someone have drilled some passage way out inside and 
>messed it up??    If you know of a small carb expert I might contact with 
>this question please let me know.     John Wilkens
>
>                    In the wide-open spaces of NE Oregon
>
>
>
>_______________________________________________
>AT mailing list
>http://www.antique-tractor.com/mailman/listinfo/at

_________________________________________________________________
Tired of spam? Get advanced junk mail protection with MSN Premium   
http://join.msn.com/?pgmarket=en-ca&page=byoa/prem&xAPID=1994&DI=1034&SU=http://hotmail.com/enca&HL=Market_MSNIS_Taglines