Subaru Robin Power Products EY15V, EY20V manual 10*0.02

Page 50

ITEM

EY15lengthFree

Squareness

Valve stemO.D.

Clearance between stem and guide

I

ENGINE MODEL

1 EY20

I::E:

STANDARD

SIZE

37

Intake

Exhaust 6.5 dia'

Intake 6.5 dia. Exhaust

Intake

Exhaust

Intake

Exhaust

t	CORRECTION		1		I
	TOLERANCE	L I M I T		L I M I T
				USE
		-1.5			1
				'.'	1
	-0.025-4.040
	-0.056--0.078	-0.15
	-0.025--0.040
	-0.056--0.078
	0.025 - 0.062
	0.056 - 0.100	0.3		0.3
	0.056 - 0.100

REMARKS

For total length

At middle

1

I

TOOL

Vernier calipers

Micro- meter

Cylinder

1'>ORRECTIOh I

METHOD

Replace

Replace

Replace

Replace

Tappet clearance I EY20 EY15

Stem end length

			E Y20
	Total length
	Clearance between	I	EY15
	stem and guide	I	EY20
	Spark plug	1	EY 15
	Spark plug		E Y 2 0
			E Y 2 0

Intake5.9

Exhaust 5.9

Intake 6.2

Exhaust6.4

35.6

41.7

NGK BM4A

	When cold	below
	When cold	0.05
	0.10*0.02	above
		0.25
	0.1 - 0.3	0.5
		-1 .o	-1 .o
	+0.06 - 0	- 0 . 5	- 0.5
~~~	~
0.013 - 0.037		0.2	0.2

Vernier calipers

Vernier calipers

Correct

Replace

Replace

Replace

Spark gap	1	EY15
		EY20
Spark timing	1	EY15
		EY20
Pointopening	I	:;E:

	0.6 -0.7	1
	0.6 -0.7
23"before T.D.C.	f 2"	f 5"
	~
0.35	f 0.05	5 0.1

Timing tester

Contact breaker

Adjust or replace

Adjust

Adjust

- 46 -

Image 50

Contents Page Side Valve Wisconsin RobinContents Basic Theory ofT .I.C SPEC1FICATIONS ModelPerformance Continuous Rated OutputFeatures CYLINDER,CRANKCASE Crankshaft6VALVEARRANGEMENT Connecting ROD and PistonCamshaft Lubrication CylinderheadCooling 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 MOW to Reassemble Precaution in reassembling~Sequesnceand precautionsin reassembling 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 StarterMagneto BreakerpointadjustmentTo 6-3TIMING Adjustment MagnetoTiming Adjustment See Figs ,43 Solidstate Ignition MagnetotroubleshootingSpark Testing C. TransistorignitioncircuitDiscrimination accordingto the dimensions GovernoradjustmentPoint where the governorspring is to be hooked Page Carburetor 1 Float System1 Throttle System Disassembly and Reassembly2 Pilotsystem Float System BREAK-IN Operation of Reassembledengine Basic Theory of T.I.C. See Fig FeaturesIO. Robin Solid State Ignition Engine 11- 1 Starting Difficulties 11- 1-2 Compression System11-3ENGINE Stops 11- 1-3ELECTRICAL System11-2ENGINGEMIFIRES 11- 4 Engine OverheatsEngineknocks Enginebackfires through CarburetorVENT1LATION InstallationPower Transmission to Drivenmachines Exhaust GasdischargeSolid State Ignition Type WiringBreaker Point Ignition Type Checks and Corrections Table of Correctionstandards 1.o 10*0.02 #20 220 15-3EVERY 50 Hours IO Dayschecks and Maintenance Daily Checks and MaintenanceEvery 20 Hours Checks and Maintenance Every 100 200 Hours Monthly Checks and MaintenancePREPARATiON for Longabeyance Every 500 600 Hours Semiannual Checks and MaintenanceEvery 1000 Hours Yearly Checks and Maintenance Page Page Page Page Industrial Engines