TM 5-4240-501-14&P
Idling Device and Throttle Control
(Two Piece Flo-Jet)
A manual friction control may be used to limit throttle
movement, to any pre-set position. It is commonly used
for two purposes. 1. To return the throttle to a "no-load"
position on a pump, generator, etc.; 2. For cold weather
starting on governed idle engines. The throttle can easily
be kept in a "near closed" position, while starting, which
is most favorable for cold weather starts. Fig. 97.
Fig. 97 - Idling Device and Throttle Control
Remote Throttle Control
(Two Piece Flo-Jet)
The remote throttle control opens the carburetor throttle
until the full governed speed is obtained, at which point
the governor takes over control of the throttle. At any
point below the governed speed, the throttle is held in a
fixed position and the engine speed will vary with the
load. Fig. 98.
Fig. 98 - Remote Throttle Control
CARBURETION
Cross-Over Flo-Jet
CROSS-OVER FLO-JET
The cross-over Flo-Jet carburetor is used on Model
Series 253400 engines and is a float type carburetor with
idle and high speed adjustment needles. This carburetor
also has an integral fuel pump. All adjustments can be
made from the top of the carburetor, Figs. 99 and 100.
Fig. 99
Fig. 100
Disassembly, Cross-Over FIo-Jet
Remove idle and high speed needle adjustment valves.
Remove float bowl mounting screw, washer and float
bowl. Using a large blunt screw driver, remove nozzle
screw. Remove float hinge pin, float and float inlet
needle. Use screw driver to remove two (2) screws from
choke shaft. Then remove choke plate and choke shaft.
Use screw driver to remove screw from throttle shaft.
Then remove throttle plate and throttle shaft. Use screw
driver to remove three (3) screws from fuel pump body.
Remove fuel pump from carburetor taking care not to
lose the pump valve springs.
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