Re: [KOML] Is any one there?

[Don Pillsbury <pills@ids.net>]

No John, unfortunately it is not a joke.  There were two very subtle
changes to go from a -12 carburetor to a -32 which my plane requires.  I
was able to track it down because the 3 of the -32 was over stamped.  It
turns out that the mixture control valve is orientated 5 degrees leaner
in the -12 and that it does not have a restriction in the economizer
jet.  Lack of that restriction causes the carb to run leaner at partial
throttle settings.  So the engine had two strikes against it.
Fortunately, I was able to locate a brand new -32 for less than the cost
of an overhaul.

The good thing about all this is that I have finally located a definite
cause and a positive fix for a problem that I only had a nagging
suspicion before.  Unfortunately, I was a costly process.

Don

John J. Stafford wrote:

>  > [...] Turns out that the carburetor was
> >not properly overhauled 21 years ago.[...]
>
> This is a joke, correct? I was under the impression that aircraft were
> under strident inspection and engineering standards. Heck, the carbs
> from my BMW R100RS lasted 100,000 miles. Oh yea, that covered only 32
> months. Never mind....