Subaru Robin EX30 - Manual (Page 55)

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The procedures for overhauling the carburetor are described below.
12-3-1 THROTTLE SYSTEM
(1) When the throttle stop screw is removed, the spring can be taken out.
(2) Remove the phillips screw and the throttle valve , then take out the throttle shaft .
When removing the throttle valve, take care not to damage the valve edge.
12-3-2 CHOKE SYSTEM
(1) Remove the choke valve . Then pull out the choke shaft .
(2) When reassembling the choke shaft, be sure to position the cutout on the choke valve facing the pilot air jet.
12-3-3 PILOT SYSTEM
(1) Remove the pilot jet . Use the correct tool so as to avoid damaging the jet.
(2) When reassembling the pilot jet, be sure to fi rmly tighten it, otherwise fuel may leak, leading to engine
malfunction.
12-3-4 MAIN SYSTEM
(1) Remove the screw and remove the fl oat chamber body .
(2) Remove the gasket from the body .
(3) Remove the main jet from the body .
(4) When reassembling the main system, be sure to fasten the main jet fi rmly to the body, otherwise the fuel
concentration in the fuel/air mixture may become too rich, leading to engine malfunction.
(5) The tightening torque of the screw is 9 N
●
m (90 kgf
●
cm / 6.5 ft
●
lb.). Be sure not to forget to mount the
washer.
12-3-5 FLOAT SYSTEM
(1) Take out the fl oat pin and then remove the fl oat and the needle valve .
※ Since the needle valve is linked to the fl oat , take care when assemble.
※ Do not use drill or similar objects for cleaning the jets, as these are likely to damage the orifi ces, which in turn
can impair fuel fl ow. Use compressed air to clean the jets.
※ The fl oat pin is pressed into the carburetor body. When removing the needle valve and the fl oat, a rod or a
similar tool slimmer than the fl oat pin should be used. Tap the reverse side gently and remove.