Subaru Robin Power Products R1200 service manual Carburetor

Page 71

9-5 CARBURETOR

9-5-l FUNCTION AND STRUCTURE

(1)Float System

The float chamber is located directly under the carburetor. The float and the needle valves maintain a constant fuel level inside the float chamber while the engine is running.

The fuel in the tank flows into the float chamber through the needle valve. When a certain quantity of the fuel enters the chamber the float rises and when the buoyancy of the valve balances with the fuelin-flow pressure the needle valve is interrupted to keep the fuel at the correct level.

(2)Pilot System

The system controls the fuel supply for engine speeds ranging from idling to low-speed running. The fuel flows through the main jet into the pilot jet where the fuel quantity is measured. Then, the fuel is mixed with air measured in the pilot air jet, and is supplied from the pilot outlet by- pass to the engine. Fuel for idling is supplied mainly from the pilot outlet.

(3)Main System

The system supplies fuel for medium and high speed operations. The fuel is measured in the main jet, and then flows into the main nozzle. Air measured in the main air jet mixes with the fuel from the bleed hole of the main nozzle bursting into the main bore in the form of gas mist. Then it is again mixed with air inducted through the air cleaner to get appropriate density, and finally it is supplied to the engine.

(4)Choke System

The choke system helps start the engine in cold weather.

When the choke is closed and the engine is started, the load to the main nozzle increases and inducts a large quantity of fuel, thus facilitating starting.

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Contents Rozh -J &ii Foreword Contents Assembly Items SpecificationsAC Output Power FactorRated 800 W Frequency 50 Hz Voltage 110 Output Max Output MaxUnder no load is approximately from 18V up to Frequency 60 Hz Voltage 12ov DC OutputFeatures CHOKE-RUN-STOP Component IdentificationFunction of Each Component L-5 Camshaft 4CONNECTING ROD and PistonMain Bearing Cover CrankshaftCarburetor AIR CleanerDescription of Main Operations ‘CCVoltage Regulation Under Load Fis Output Waveform Current @ Curr&t @ Operational Limits of the Generator Load Electric Battery Capacity Wire Length II ’ Mj 1 mI Measuring ProceduresPage To Measure Insulation Resist Control Panel L a Functional Check of Each ComponentOne section, replace with Assy 83 AVR Windings, or peripheral temperature Value El 10.7J-z Cleaning of Slip RingResistance Exciting coil At rated rpmDisassembly and Assembly Driver Precautions ToolsPrecautions Nection Description M5 x 8 screws SequenceI Part to remove j IFront cover DescriptionI2 Remove the front cover By unscrewing threeDamage the fuel Pipe Description PrecautionsPart to Sequencej remOve Be careful not toSpanner Part to Sequence, removeLpanner Part to Remove $Ez End cover Description Precautions@ Driver Remove the connector Assembling, be That 1wiringSee Fig. g-3-10 RemOve ’Rear ‘bracket Description’ plastic hammer SequenceI Rpearfito~~ DescriptionPull away the stator cover Siw‘ 13 m/m box Spanner Necessary PrecautionsPart to / Sequencej remove ’ JFront Ibracket Description RemOve I10 m/m box spanner DescriptionPrecautions Necessary Tools Blower i 1 1housingNecessary Precautions . tools @ Driver ’Governor Remove the governor lever j Lever Precautions Bolt has only to be loosenedOne M6 x 12 bolt Brace nuts 112m/m box ’spanner 10 m/m box jspannerCrank case by taking 26 i &cocci*nRemove the starting pully Ignition coil fromRetainer Pull out the intake valve and the exhaust valveNotch Spanner 1spring retainer’s Front and hook ’ the minus driverCrankcase Tappets to distin Guish them from one ISequenceI Part toCamshaft Description Remove the crankshaft Be careful not to Be careful not to open the joint too wide, or it will breakAssembly Procedure WTolerances of new installed parts Piston and Piston Ring Connecting rod is joined to the piston with the piston pinTappets and Camshaft Connecting RODIntake Valve and Exhaust Valve =53 WV&e h valve guide clearanceBreather Plate and Tappet Cover Cylinder Head Tappet AdjustmentGovernor Lever Ignition PlugIgnition COIL, Exciting COIL, Flywheel and Starting Pulley Speed Control Muffler and Muffler Cover Nut1’7 Recoil Startor Head Cover and Blower HousingFront Bracket Rear Bracket and Stator Brash Holder Bracket Cover Page Front Cover and Element Cover Fuel Pipe ConnectionConnection of Coupler and Plug Secure the side cover with four M 5 x 8 screws Carburetor Schematic Diagram of the Fuel System By-Pass Choke Disassembly and Assembly of Carburetor 184 Safety Precautions Troubleshooting Starting failur Cock is closed Pzlzq L1Ill IISymptoms AIgnition coil ’ \ r?J Hanging posi- tion is not normal Abration 7Symptoms 0Governor system III Seat Case Case there Abnormal Operation Is too much Pour Lubri Been changed Replace Periodically 1Symptoms Voltemeter Stator sub-coil Symptoms LNo DC voltage is output Voltag,eistoo high QParts LSymptoms Symptoms Voltage Is abnormally low Parts Criteria Table For AdjustmentUel con Limit Items Adjustment Criteira Description Tools LT-Tw Wiring DiagramMaintenance Checks and Maintenance for Every 200 Hours Every Month Page Page Issue EMD-GS0095
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