wrote in message
oups.com...

Corky Scott wrote:

John Deakin has written that if you lean to the lean side of peak and
the engine runs rough, pulling on full carb heat will distribute the
fuel into the air mixture better and give you the ability to lean to
the lean side of peak.

You might just try it, if only for a little bit if you are too
uncomfortable with the process.


Doesn't always work. I tried it on the O-360 in my Cherokee and the
carb heat made no difference. It still stumbled right after peaking.
Induction systems are different from plane to plane and even from year
to year on the same model. The carb heat trick does work on certain
planes that I fly, so I think it's worth a try. Just don't get your
hopes up.

Deakin was talking about the engine in the Skylane with the whatsitsname
carburator.

http://www.avweb.com/news/columns/182084-1.html

"Here's another tip for carbureted engines, if you're operating high enough
to use full throttle, or nearly so. From the full-throttle position, pull
the throttle back until you observe the slightest drop in MP - perhaps a
quarter-inch or less. Leave it there. That will cock the throttle plate a
little, just enough to set up a vortex that will cause better atomization
and mixing of the fuel and air. (This is counterproductive in fuel injected
engines.)"

In a previous post, I'd said he recommended adding a "touch of carb heat" --
sorry.