Johnson J10RLSRD Service Manual page 158

Check for correct positioning of the float level. The
float level controls the height of fuel in the float
chamber and is essential 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 on gauge.
Use notch that is indicated "9.9 & 15 HP." Be cer-
tain gauge is not holding down the float.
o
99 &I5H.P.
Float Gauge
I681>lf
2 THRU6H.P.
93328
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
body to setting shown.
Float Drop Setting - 9.9/15
1 in. to 1 3/8 in. (25 to 35 mm)
FUEL SYSTEM
CARBURETOR
Bend the float lever tab to adjust float drop.
1 2
3
1. Base of carburetor body 803406
2. Float lever tab
3. Float drop dimension
Install the float chamber and a new gasket.
Tighten the screws to a torque of 8 to 10 in. Ibs.
(0.8 to 1.2 N·m), following sequence embossed on
float chamber.
6
Install the carburetor body cover and gasket.
Tighten the screws to a torque of 8 to 10 in. Ibs.
(0.8 to 1.2 N·m), following sequence embossed on
cover.
HR Models Only
Install the low-speed needle and spring. Turn nee-
dle carefully until it lightly contacts the seat; then
back it off three turns.
1. Float chamber and gasket
002535
2. Carburetor body cover and gasket
3. Low-speed needle and spring (10RH models only)
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