I'm not so sure about the sticking float theory. Whilst it is true that Zenith 
carbs can suffer from this - it doesn't seem to fit your symptoms. When a float 
sticks, or the fuel inlet flow is impaired, then fuel enters the the chamber at 
a reduced or zero rate. The symptoms (fuel starvation) occur once the engine 
has used the available fuel in the chamber. So, if going around left hand bends 
was causing the float to stick, the effect would be seen further down the road. 
Now, it is possible that if you have a long straight BEFORE the left hand bend 
and you have been pushing the Landie enthusiastically befre going through the 
gears into the bend, that starvation symptoms would occur. It wouldn't matter 
though whether this was left or right handed. If the float is sticking due to 
lateral forces - this may have occurred before said straight.

I've recently had cause to be all too familiar with this problem. I've had 
problems with my 87 cvh Weber dft equipped  4/4 coughing and spluttering to a 
halt, only to limp home on a very sensitive throttle. I eventually traced the 
problem to a sticking primary float (the left one as you look down on the dft 
from the offside). Took a complete strip down of the carb and a set of new 
gaskets to sort it.

Just one other thought. You say that the Zenith is a new aftermarket carb. It 
is possible that you can see exactly the same symptoms as fuel starvation if 
there is the slightest of gap between gaskets, allowing the engine to draw air 
without first getting an air fuel mix. Again this wouldn't answer the left hand 
bend observation - but it's not uncommon when putting on new carbs to overlook 
just how important the air seal is.

Best regards

David

On 25 Jul 2012, at 10:30, LawrenceLowe wrote:

> 
> ...you've seen us then, oops secrets coming out now!!   I'll suggest that,
> from a distance. A trip to Glenrothes should provide more than sufficient
> roundabouts!
> 
> Lawrence
> 
> 
> -----Original Message-----
> From: Colin Mackay [mailto:[email protected]] 
> Sent: Wednesday, July 25, 2012 9:51 AM
> To: mogtalk2
> Subject: [mogtalk2] (non Mog) Series Land Rover cuts out turning left
> 
> 
> You will have to drive it in the middle of the night with the bonnet off,
> Les strapped to the front bumper looking into the engine bay and do brisk
> anti-clockwise laps of a roundabout then!
> 
> Colin
> 
> 
> 
> 
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