Timing Adjustment See Figs ,43 | Subaru Robin Power Products EY20V

6-3 TIMING ADJUSTMENT (See Figs. 42,43 and 44.)

The spark is timed to occur at 23" before the piston reaches TDC on the compression stroke. This spark ad- vance of 23" is controlled by the breaker point opening and this advanceis obtained when the breaker point opening is adjusted according to the BREAKER POINT ADJUSTMENT to its proper point opening. How- ever, the advance timing is more accurately adjusted through the following procedures using a timing tester as shown in Fig. 43.

Note: Refer tosection "4-11 IGNITION" and "4-13CHECKS and CORRECTIONS."

6 - 3- 1 ALIGNMENT MARK for TIMING ADJUST- MENT (See Fig. 42.)

For timingadjustment,thefollowingalignment marks are provided as shown inFig. 42.

*"M" mark and line on the crankcase

*"P" mark and line on the flywheel cooling fan

Fig. 42

6 - 3 - 2 TIMINGADJUSTMENT with TIMING TESTER

1)Disconnect the stop switch leadwires and the coil primary wire.

2)Remove the blower housing from the engine.

3)Connectthetimingtesterleadwith red rubbercap to the coil primary wire andgroundthe lead with black rubber cap to the crankcase. (SeeFig. 43.)

While the points are open, the buzzer within tester remains ringing and when the points areclosed, the tester remains silent. (See Fig. 43.)

4)Turn the flywheel slowly until alignment mark on the flywheel is in the line with alignment mark on the carankcase.

Fig. 43

Fig. 44

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Image 33

Subaru Robin Power Products EY20V, EY15V manual Timing Adjustment See Figs ,43

Contents

Page Wisconsin Robin Side Valve Contents Basic Theory ofT .I.C Model SPEC1FICATIONS Continuous Rated Output Performance Features Crankshaft CYLINDER,CRANKCASE Connecting ROD and Piston Camshaft6VALVEARRANGEMENT Cylinderhead CoolingLubrication 112CARBURETOR 111IGNITION Model EY15V Sectional View of Engine Air Cleaner Muffler Cover Model EY20V Model EY20V Special Tools Preparations and Suggestions ApplicalbeShape Model Order 3HOW to Disassemble Tool Order Exhaust valve Main bearing cover Procedures Remarks OrderProcedures ~Sequesnceand precautionsin reassembling Precaution in reassemblingMOW to Reassemble Crankshaft EY15V Eyzov Dimensions of Crankshaft Pin Periphery.I Y20 5 Mainbearing Cover Valve and Valve Guide Clearance 6INTAKE and Exhaust Valves 7TAPPET Adjustment Kg-cm ’ 5-4-8CYLINDER Head Intake Manifold 1FUEL Tank Bracket 1 7 Recoil Starter 14AIRCLEANER To 6-3TIMING Adjustment BreakerpointadjustmentMagneto Magneto Timing Adjustment See Figs ,43 Spark Testing MagnetotroubleshootingSolidstate Ignition C. Transistorignitioncircuit Governoradjustment Point where the governorspring is to be hookedDiscrimination accordingto the dimensions Page 1 Float System Carburetor Disassembly and Reassembly 2 Pilotsystem1 Throttle System Float System BREAK-IN Operation of Reassembledengine Features IO. Robin Solid State Ignition EngineBasic Theory of T.I.C. See Fig 11- 1-2 Compression System 11- 1 Starting Difficulties 11-2ENGINGEMIFIRES 11- 1-3ELECTRICAL System11-3ENGINE Stops 11- 4 Engine Overheats Enginebackfires through Carburetor Engineknocks Power Transmission to Drivenmachines InstallationVENT1LATION Exhaust Gasdischarge Wiring Breaker Point Ignition TypeSolid State Ignition Type Checks and Corrections Table of Correctionstandards 1.o 10*0.02 #20 220 Every 20 Hours Checks and Maintenance Daily Checks and Maintenance15-3EVERY 50 Hours IO Dayschecks and Maintenance Every 100 200 Hours Monthly Checks and Maintenance Every 500 600 Hours Semiannual Checks and Maintenance Every 1000 Hours Yearly Checks and MaintenancePREPARATiON for Longabeyance Page Page Page Page Industrial Engines