Yamaha MA190, Service Manual

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35
Carburetor
Wash the carburetor in the clean place, first, clean the outside surface, and wash the inside the
parts with special carburetor detergent or industrial gasoline. Exception for washing impurities,
also wash the gasoline colloid on the part surface. Blow the washed parts clean with compression
air, and don’t use cloth and paper against recontamination. Don’t use the steel wire and other hard
material to open the blocked hole to prevent carburetor performance from changing holes diame-
ter. Use the gasoline and compression air to clean it.
Ser.
No.
Description
Ser.
No.
Description
Ser.
No.
Description
1 Throttle valve 11 Pilot jet 21 Float pin
2 Throttle valve shaft 12 Choke stopper spring 22
Float chamber sealing
ring
3 Small washer (A class) 13 Pilot screw 23 Float chamber
4 Cross pan head screw 14 Pilot screw spring 24 Sealing ring
5 Choke shaft 15 Throttle stop screw 25 Oil cup bolt
6 Choke 16 Screw spring (option) 26 Washer
7 Small washer (A class) 17 Main nozzle 27 Oil drain plug
8 Cross pan head screw 18 Main jet 28 Carburetor
9 Cross pan head screw 19 Float valve
10 Gasket 20 Float
NOTICE
9
Loosen the drain bolt and completely drain the fuel out before installing carburetor.
9
No fire
4-3 Engine