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Subaru Robin Power Products EH12-2, EH17-2, EH25-2 manual Decompression System

Models: EH12-2, EH17-2, EH25-2

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4-16 DECOMPRESSION SYSTEM

4-16 DECOMPRESSION SYSTEM

An automaticdecompressionmechanismwhich opensexhaustvalvebeforethepistonreachescom- pressiontop is assembledonthecamshaftforeasy starting.

AUTOMATIC DECOMPRESSOR SYSTEM

Fig. 4-14

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Subaru Robin Power Products EH12-2, EH17-2, EH25-2 manual Decompression System, Automatic Decompressor System

Contents

Page CONTENTS SectionTitle PagePage I.SPECIFICATIONS ModelEH12-2 EH12-2BModel EH17-2EH17-2B EH17-2BSModel EH25-2EH25-2 E H 2 5 - 2 6 s2-2 CONTINUOUS RATED OUTPUT 2-1 MAXIMUMOUTPUT2-3 MAXIMUM TORQUE +3l2 8 2-4 PERFORMANCECURVES 0 EHlPD, B for B type HP kW3000 4000N . m kgfam 0 EH17Dfor B tvDe 30003000 HP kWIMAXIMUM HORSEPOWERNET EH25D, B N . m kgf-m3. FEATURES 4. GENERAL DESCRIPTIONOF ENGINE COMPONENTSThe crankshaft is forged carbon steel, and the crank The intake valve is located on flywheelside of the cylinder head against load variations Theenginesareequippedwithahorizontaldraft 4-16 DECOMPRESSION SYSTEM AUTOMATIC DECOMPRESSOR SYSTEM4-17 SECTIONAL VIEW OF ENGINE FUEL TANKFLYWHEEL MAIN BEARING COVERROCKER ARM PUSH ROD5. DISASSEMBLY AND REASSEMBLY 5-3 DISASSEMBLYPROCEDURES ProceduresPart to remove RemarksProcedures Step Part to removeWipe off spilt fuel socket wrenchProcedures BLOWER HOUSING4pcs Remarks I Tool1pc. EH25-2 starter ProceduresRemarks 2pcs Procedures Step Partto remove10 Governor lever, Governor rod and Governor spring speed control leverI Remarks ProceduresRemove starterpulley from flywheel M6 X 25mm Screw Remarks Proceduresstep cover M8 BOLT and WASHER 8 pcs. EH25-2Procedures Page oil seal Step Partto removeProceduresRemarksTooCRANKSHAIT Dtype Intake valve 1Clean parts throughly before reassembly VALVE RECESS M 6 X 34 mm flangebolt2pcs EH12-2M7 X 37 mm flange bolt 2pcs. EH17-2Page SPACER SHIMS Place spacers chosen at procedure1 on crankshaft and camshaft kgcm ft4bSpark plug EH17-2,25-2NGK B6HS59-63 N-m 43-47 ft*lb54-15 CARBURETOR 54-16 GOVERNOR SYSTEMPage Install the head cover to the cylinder head 6. IGNITION SYSTEM 7 cn 6-3 WIRING DIAGRAM Stop switch12VOLT BATTERY MtNIMUM AMP.HR STANDARD7. AUTOMATIC DECOMPRESSION SYSTEM CRESCENT EXHAUST8. CARBURETOR 21 -@ B 1Remove the boltl2and take out float chamber bodyl3 9. STARTING SYSTEM 9-1 RECOIL STARTERcase do not abruptly put off your onto the notchof the reel and rewind the spring into the housing of the springIO. TROUBLESHOOTING Check the followings for lackof sparks 1Poor quality gasoline 11. INSTALLATION 12. SERVICE DATA STDLimitEH12-2 LmitEH17-2 STD Lmit CYLINDERLmit PISTONr EH25-2 DittoUni rnm in STD Limit STD LimitTEH17-2 0 Ring groovesideclearanceSTD Limit 1 EH25-20.0591 0.004EH12-2 STDLimit ZONNECTING RODCRANKSHAR 0.010EH17-2 LimitCRANKSHAFT 0.0047lTEM EH25-2CRANKSHAFT Unit mm inSTDLimit EH12-2 / EH17-2VALVE coldLimit EH25-2ZAMSHAFT VALVESTDLimit 0.31348.000-8.015 0.3150 0.001 0EH25-2 EH12-2117-2STDlimit STDLimit12-2TORQUESPECIFICATIONS EH12-2/ 17-2 type DESCRIPTIONTIGHTENING TORQUE EH25-2 type12-3 OIL GRADE CHART Comparison between oil viscosity and temparature Single gradeSpecified Lubrican Multi- grade13. MAINTENANCE AND STORAGE I 1 Change crankcaseoil1 Clean fuelfilter and fuel tank Page ~bin America, Inc SU6ARU940 LivelyBlvd. l WoodDale,IL 60191 l e-mail sale.s@robinamerica.com