Subaru Robin Power Products EY15V, EY20V manual 7TAPPET Adjustment

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5-4-7TAPPET ADJUSTMENT

Lower the tappet all the way down, push the valve, and insert a feeler gauge between the valve and tappet stem to measure the clearance. (See Fig. 33.)

Note: The correct tappetclearance for bothintake and exhaust valve is 0.7 mm k0.02 mm as measured when the engine is cold.

1

	I	/
	I	Fit t-heoil seal to the valve stem. [Only for EY201
I	L
Fig. 33		Fig. 34

,”.

Note: If the clearance is smaller than specified, slightly grind the topof the valve stem, and measureit again. On the contrary, if the clearance is too large, replace the valve with new one, and polish its contact surface with a compound to obtain a good fit. Then adjust the clearance.

Note: After the tappet clearance adjustment, install the valve spring retainers, and turn the crankshaft, and measure the tappet clearance once againif it is correct.

Note: [Only for EY20VI After the tappet clearance adjustment, fit the oil seal to the intake valve stem.

Note: INSTALLATION ofSPRING RETAINERS Place the notch on the outercircumference of the retainer toward this side and insert the re- tainer, like pushing in, using a special tool. (This special tool is used for EY18 and other models.) If a driver is used, insertion may be easier.

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Fig. 35

Front should be this side.

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Contents Page Side Valve Wisconsin RobinContents Basic Theory ofT .I.C SPEC1FICATIONS ModelPerformance Continuous Rated OutputFeatures CYLINDER,CRANKCASE CrankshaftCamshaft Connecting ROD and Piston6VALVEARRANGEMENT Cooling CylinderheadLubrication 111IGNITION 112CARBURETORSectional View of Engine Model EY15VAir Cleaner Muffler Cover Model EY20V Model EY20V Preparations and Suggestions Special ToolsApplicalbeShape Model 3HOW to Disassemble OrderTool Order Exhaust valve Main bearing cover Procedures Remarks OrderProcedures Precaution in reassembling ~Sequesnceand precautionsin reassemblingMOW to Reassemble CrankshaftDimensions of Crankshaft Pin EY15V EyzovPeriphery.I Y20 5 Mainbearing Cover 6INTAKE and Exhaust Valves Valve and Valve Guide Clearance7TAPPET Adjustment ’ 5-4-8CYLINDER Head Kg-cm1FUEL Tank Bracket Intake Manifold14AIRCLEANER 1 7 Recoil StarterBreakerpointadjustment To 6-3TIMING AdjustmentMagneto MagnetoTiming Adjustment See Figs ,43 Magnetotroubleshooting Spark TestingSolidstate Ignition C. TransistorignitioncircuitPoint where the governorspring is to be hooked GovernoradjustmentDiscrimination accordingto the dimensions Page Carburetor 1 Float System2 Pilotsystem Disassembly and Reassembly1 Throttle System Float System BREAK-IN Operation of Reassembledengine IO. Robin Solid State Ignition Engine FeaturesBasic Theory of T.I.C. See Fig 11- 1 Starting Difficulties 11- 1-2 Compression System11- 1-3ELECTRICAL System 11-2ENGINGEMIFIRES11-3ENGINE Stops 11- 4 Engine OverheatsEngineknocks Enginebackfires through CarburetorInstallation Power Transmission to DrivenmachinesVENT1LATION Exhaust GasdischargeBreaker Point Ignition Type WiringSolid State Ignition Type Checks and Corrections Table of Correctionstandards 1.o 10*0.02 #20 220 Daily Checks and Maintenance Every 20 Hours Checks and Maintenance15-3EVERY 50 Hours IO Dayschecks and Maintenance Every 100 200 Hours Monthly Checks and MaintenanceEvery 1000 Hours Yearly Checks and Maintenance Every 500 600 Hours Semiannual Checks and MaintenancePREPARATiON for Longabeyance Page Page Page Page Industrial Engines