Among the first
successful fuel metered types, Perry carburetors exhibit excellent
idle and throttle transition characteristics. We have tested
Perry carburetors on many Fox engines and found
them to work very well.
The fuel metering,
and adjustment system, functions quite differently from the the
now common two needle system. A single needle valve is employed
to set the high-speed mixture. The idle and midrange mixture
is metered by a thin slot which adjustable by means of a metering
disc on the same side of the carb as the main needle. By rotating
this disc the metering slot can be positioned for best control
of the idle and midrange fuel mixture.
We really have
only two minor concerns with the Perry carburetor. First, the
metering disc is quite sensitive to adjust and a very small
movement can make a significant change. Also, the rubber O ring
which seals the metering disc to the carburetor body can deteriorate
over time making adjustments difficult, or causing an air leak.
This is an easily replaceable part though. Overall, we'd still
have to say that the Perry is one of the best carburetors ever
made for use on RC glow engines. They are produced in a variety
of sizes to suit a wide range of engine displacements and an
adapter is also available for the unusual flange mount system
used on Fox engines. If you are having carburetor problems and
don't care to play around with modifications, a Perry carburetor
is the way to go.
Perry is now
a division of Conley Precision Products. For more information
on Perrry carburetors and pumps, visit their