TM 5-4240-501-148P
CARBURETION
One Piece Flo-Jet
The small one piece Flo-Jet carburetor is illustrated in
Figs. 72 and 73 and was used on Model Series 60700,
61700, 80700, 81700, 140700, 141700, 144700 and
145700. These are float feed carburetors with high
speed and idle needle valve adjustments.
Fig. 74 - Large One Piece Flo-Jet Carburetor
Fig. 75 - Large One Piece Flo-Jet Carburetor
The large one piece Flo-Jet carburetor is similar to the
small one piece Flo-Jet. The main difference is that the
high speed needle is below the float bowl. See Figs. 74
and 75. Repair procedures for small and large Flo-Jet
carburetors are similar except for location of adjusting
needles.
Disassemble Carburetor, Small One-Piece Flo-Jet
Remove idle and high speed adjusting needles. Remove
bowl nut and float bowl. Use screw driver to remove
nozzle. Remove float pin to remove float and float
needle. Use a large wide screw driver to remove float
valve seat.
Disassemble Carburetor, Large One-Piece Flo-Jet
Remove idle mixture needle. Remove high speed
needle valve assembly from float bowl and remove float
bowl. Use a thick blade screw driver to remove nozzle,
then remove jet from top of carburetor. Remove float pin
to remove float and float needle.
Disassemble Continued, Small and Large One-Piece
Flo-Jet
If necessary to remove choke shaft, venturi or throttle
shaft, proceed in following sequence. Pry out welch
plug. Remove choke valve. On carburetors with nylon
choke shafts, remove choke valve as shown in Fig. 78.
Venturi can now be removed, Fig. 77. (Choke-A-Matic
large carburetors have a plate stop pin which must be
pressed out to remove venturi.) To check for throttle
shaft wear, refer to Two Piece Flo-Jet for procedure for
checking.
Fig. 76 - Repair Carburetor
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