Yamaha MA190 Service Manual page 40

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.
Description
No.
1 Throttle valve
2 Throttle valve shaft
3 Small washer (A class)
4 Cross pan head screw
5 Choke shaft
6 Choke
7 Small washer (A class)
8 Cross pan head screw
9 Cross pan head screw
10 Gasket
NOTICE
9 Loosen the drain bolt and completely drain the fuel out before installing carburetor.
9 No fire
Ser.
Description
No.
11 Pilot jet
12 Choke stopper spring
13 Pilot screw
14 Pilot screw spring
15 Throttle stop screw
16 Screw spring (option)
17 Main nozzle
18 Main jet
19 Float valve
20 Float
35
4-3 Engine
Ser.
Description
No.
21 Float pin
Float chamber sealing
22
ring
23 Float chamber
24 Sealing ring
25 Oil cup bolt
26 Washer
27 Oil drain plug
28 Carburetor