10*0.02 | Subaru Robin Power Products EY15V, EY20V manual

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

Subaru Robin Power Products EY15V, EY20V manual 10*0.02

Contents

Page Side Valve Wisconsin Robin Contents Basic Theory ofT .I.C SPEC1FICATIONS Model Performance Continuous Rated Output Features CYLINDER,CRANKCASE Crankshaft 6VALVEARRANGEMENT Connecting ROD and PistonCamshaft Lubrication CylinderheadCooling 111IGNITION 112CARBURETOR Sectional View of Engine Model EY15V Air Cleaner Muffler Cover Model EY20V Model EY20V Preparations and Suggestions Special Tools ApplicalbeShape Model 3HOW to Disassemble Order Tool Order Exhaust valve Main bearing cover Procedures Remarks OrderProcedures MOW to Reassemble Precaution in reassembling~Sequesnceand precautionsin reassembling Crankshaft Dimensions of Crankshaft Pin EY15V Eyzov Periphery.I Y20 5 Mainbearing Cover 6INTAKE and Exhaust Valves Valve and Valve Guide Clearance 7TAPPET Adjustment ’ 5-4-8CYLINDER Head Kg-cm 1FUEL Tank Bracket Intake Manifold 14AIRCLEANER 1 7 Recoil Starter Magneto BreakerpointadjustmentTo 6-3TIMING Adjustment Magneto Timing Adjustment See Figs ,43 Solidstate Ignition MagnetotroubleshootingSpark Testing C. Transistorignitioncircuit Discrimination accordingto the dimensions GovernoradjustmentPoint where the governorspring is to be hooked Page Carburetor 1 Float System 1 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 System 11-3ENGINE Stops 11- 1-3ELECTRICAL System11-2ENGINGEMIFIRES 11- 4 Engine Overheats Engineknocks Enginebackfires through Carburetor VENT1LATION InstallationPower Transmission to Drivenmachines Exhaust Gasdischarge Solid 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 Maintenance PREPARATiON for Longabeyance Every 500 600 Hours Semiannual Checks and MaintenanceEvery 1000 Hours Yearly Checks and Maintenance Page Page Page Page Industrial Engines