Johnson J10RLSRD Service Manual page 159

FUEL SYSTEM
CARBURETOR
25/30
MODELS
Install the inlet valve assembly and new nozzle
well gasket.
Install the hinge pin and float.
Install the intermediate air bleed orifice, the high-
speed orifice, gasket and manual primer fuel nip-
ple.
Install slow-speed needle and spring. Turn care-
fully until it lightly contacts seat. Back needle out 2
1/2 turns for initial setting.
Install the carburetor body cover and gasket.
Tighten the screws in an
"X"
pattern to a torque of
15 to 22 in. Ibs. (1.6 to 2.4 N·m).
1. Nozzle well gasket
DR4808
2. Inlet valve assembly
3. Hinge pin and float
4. Intermediate air bleed orifice
5. High-speed orifice, gasket and fuel nipple
6. Slow-speed needle and spring
7. Carburetor body cover and gasket
Check for correct positioning of the float level. The
float level controls the height of fuel in the float
chamber and is critical with regard to carburetor
calibration and function.
Turn carburetor body upside down and hold so
gasket surface is horizontal. The weight of the
float will close the float valve needle. Rest Float
Gauge, PIN 324891, on gasket surface, and slide
gauge up next to float. Top of float should be
between notches float gauge.
158
Use notch that is indicated "25 thru 75 HP." Be
certain gauge is not holding down the float.
dl • \l66
324891
o
Float Gauge
93329
If float level is not between the notches of gauge,
lightly bend metal float arm to adjust level. Be
careful not to force float needle valve into seat.
Check for correct float drop setting. This setting
affects the full opening of the inlet needle and is
critical to correct operation of the carburetor.
With carburetor body in normal running position,
the float must drop open from base of carburetor
to setting shown.
Float Drop Setting - 25/30
1 118 in. to 1 5/8 in. (28 to 41 mm)
Bend float lever tab to adjust float drop.
3
4
Float Drop Dimension
803406
1. Metal float arm
2. Base of carburetor body
3. Float lever tab
4. Bend dimension
E
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