Subaru ER12 - 11-4-2 Disassembly Procedure

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19. VENTURI
The venturi has the function of increasing the air flow at the nozzle section, thereby improving the
atomization of the fuel
20. CHOKE VALVE
The choke valve has the function of shutting the suction of air when the engine is started at cold state,
thereby securing the temporary supply of a rich fuel/air mixture
11-4-2 DISASSEMBLY PROCEDURE
Before disassembling the carburetor, make sure to
wash it with clean gasoline, washing oil and so on
(1) Loosen the pump cover screw ① and remove
the screw and the pump cover ②
(2) Remove the pump gasket ③, the diaphragm
④, the spring ⑤ and the inlet screen ⑥
(3) Next, place the carburetor with the primer
pump side up and remove the primer pump
cover screws ⑦ (4 screws)
(4) Remove the primer pump cover ⑨, the body
AY ⑩, diaphragm AY ⑪ and the gasket ⑫
(5) Loosen the metering lever pin screw ⑬ and
remove the lever ⑭, pin ⑮, spring ⑯, needle
valve ⑰ and etc
(6) Remove the screw ⑲ the choke valve ⑳ the
choke shaft 󰼼, be careful loss spring 󰽇 and
ball 󰽈

(7) Remove the screw 󰽉 and the throttle valve 󰽊,
and then remove the screw AY 󰽋, the clip 󰽌
and the seal 󰽍, after that remove the throttle
shaft 󰽎
①
②
③
④
⑤
⑥
⑦
⑧
⑨
⑩
⑪
⑫
⑬
⑭
⑮
⑯
⑰
⑱
⑲
⑳
㉑
㉒
㉓
㉔
㉕
㉖
㉗
㉘
㉙
㉚
㉛
Fig11-4