TOHATSU NB-1000 Service Manual page 78

6. Check the float height with the carburetor inverted on a flat
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surface. Measure the distance between the top of the float
and the float chamber surface.
lf float height is not correct, remove the float valve
assembly and make minor adjustments by slightly
bending the tabs on the metal float hinge clip. Some
models cannot be adjusted; replace the float and
valve assembly.
7. Install new gasket or o-ring on float chamber.
8. Install float chamber. Use Loctite 242 on screw threads and tighten
securely in a criss-cross pattern.
9. Install drain screw and new o-ring gasket.
lnstallation
1. Clean the carburetor mounting surfaces on the intake manifold with
isopropyl alcohol.
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2. Install new carburetor base gasket dry.
3. Mount carburetor to intake manifold and torque to specification.
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4. Install the fuel hose and clamp (5).
5. Install the throttle and choke linkage (2) and (3) and
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reconnect the choke solenoid or choke knob (4).
6. Run the engine momentarily to pressurize the fuel system and check
for leaks.
7. Adjust the ignition timing. Refer to Synchronization and Linkage
Adjustments in Section 2.
8. Mount air silencer (1) to carburetors. lf gaskets are required,
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use new gaskets. Use Loctite 242 on mounting screw
threads and torque to specification.
1-/ 2-Cylinder
NOTE
FUEL SYSTEM
T1148
T1139
T1138
T1137
3-31