<VV> Flooding Carter YH Carburetor

Leland L Garland lgarland1 at cox.net
Sun Jun 21 18:15:42 EDT 2015

Correction to below:  The float level is set at 11/16, not 11/32. Brain 
was not engaged, again.


On 6/21/2015 1:45 PM, Leland L Garland via VirtualVairs wrote:
> I'm having trouble getting my rebuilt turbo engine to run -- it will 
> start but won't idle and fuel is spilling out of the top of the 
> carburetor.  I have an Airtex low pressure electric fuel pump which is 
> producing a constant 3 PSI at the output of the fuel filter.  The 
> float level on the YH is set at 11/32 inch at the center of the float 
> and I have a Clark's steel ball inlet valve installed.  After priming 
> the carburetor I immediately pulled off the float bowl cover and the 
> fuel level is 5/8 - 3/4 inch below the top of the bowl, well above the 
> top of the baffle.  This would put the fuel level even with the top of 
> the float when installed. And, no, the float is not leaking -- it is 
> empty.
> I've gone through the carb using Bob Helt's YH book as a guide but 
> find it difficult to get the float level set.  I think it's impossible 
> to keep the float level adjustment tab pretty much perpendicular to 
> the inlet needle (or ball in my case) and keep the float parallel to 
> the bowl cover while trying to get a 3/4 inch gap between the float 
> and the bowl cover gasket surface.
> I have a Holley low pressure fuel pressure regulator that I haven't 
> installed which I may install and try to reduce the pressure to 2 or 2 
> 1/2 PSI.
> I'm getting so frustrated with this that I've started thinking about 
> pulling the turbo off and installing 2 Rochester HV's.  I do realize 
> that this would involve a lot of other stuff but I've dealt with 
> non-turbo LM's since 1966 (110's only) and I always felt comfortable  
> with them.
> I would appreciate any suggestions any of you may have regarding 
> setting the float.  I'm pretty sure I don't have any vacuum leaks -- I 
> just went through the whole setup from exhaust logs to the intake 
> cross-over.
> Leland L Garland
> '65 Monza 180
> Phoenix AZ
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