Subaru Robin EX35 - Manual (Page 61)

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The procedures for overhauling the carburetor are described below. (Refer to Fig. 13-2.)
13-3-1 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 and seal
as dust proof. When removing the throttle valve, take care not to damage the valve edge.
13-3-2 CHOKE SYSTEM
(1) Remove the choke valve . Then pull out the choke shaft and seal (polyurethane) as dust
proof.
(2) When reassembling the choke shaft, be sure to position the cutout on the choke valve facing the
pilot air jet.
13-3-3 SLOW SYSTEM
(1) Remove the slow jet . Use the correct tool so as to avoid damaging the jet.
(2) When reassembling the slow jet, be sure to firmly tighten it, otherwise fuel may leak, leading to
engine malfunction.
13-3-4 MAIN SYSTEM
(1) Remove the bolt and remove the float chamber body and spacer(carburetor) .
(2) Remove the main jet from the spacer(carburetor) .
* Do not dis-assemble, because of the main nozzle is press fit.
(3) When reassembling the main system, be sure to fasten the main jet and main nozzle firmly to the
body, otherwise the fuel concentration in the fuel/air mixture may become too rich, leading to engine
malfunction.
(4) The tightening torque of the bolt is 4 N・m (40 kgf・cm / 2.9 ft・lb.). Be sure not to forget to
mount the washer.
13-3-5 FLOAT SYSTEM
(1) Take out the float pin and then remove the float and the needle valve .
(2) Wher reassembling the float system, follow the step of the needle valve , the float , float pin ,
O-ring and O-ring (spacer) .
* Since the needle valve is linked to the float , take care when assemble.
* Do not use drill or similar objects for cleaning the jets, as these are likely to damage the orifices, which
in turn can impair fuel flow. Use compressed air to clean the jets.
* The float pin is pressed into the carburetor body. When removing the needle valve and the float, a rod
or a similar tool slimmer than the float pin should be used. Tap the reverse side gently and remove.
* Make Msure the direction of the O-ring (spacer) when reassembling.
Mount the O-ring (spacer) to set the projection on opposite side of the fuel nipple. If it is mounted
incorrect. An engine improper running.
* Make sure not any damage on the O-ring , and surely assemble, it may cause of overflow.