Robin America eh72 Service Manual

SERVICEMANUALEH65ModelPUB-ES1113Rev. 8/98Engine

- 6 -3. FEATURESThe overhead valve arrangement is adopted for ensuring high power, low fuel consumption and low oilconsumption.The adoption of twin-cy

- 7 -4. GENERAL DESCRIPTION OF ENGINE COMPONENTSROBIN EH63D/ 64D/ 65D series engine is air-cooled, 4-stroke, twin-cylinder, OHV arrangement gaso-line

- 8 -4-4 CONNECTING ROD AND PISTONThe connecting rod is forged aluminum alloy, andits large and small ends function as bearings.The piston is an alumi

- 9 -4-7 CYLINDER HEADThe cylinder head is an aluminum die-castingwhich utilizes semi-spherical type combustionchamber for the high combustion efficie

- 10 -4-10 COOLING SYSTEMThe large fins on the flywheel provide sufficientcooling air capacity for cylinder and cylinder head.The cylinder baffle help

- 11 -4-14 CARBURETORThe engines are equipped with a down draft car-buretor that has a float controlled fuel system anda fixed main jet.The carburetor

- 12 -4-17 SECTIONAL VIEW OF ENGINEFig. 4-15CARBURETOROIL PUMPIGNITION COILFLYWHEELINTAKE MANIFOLDOIL PUMP FILTERMAIN BEARING COVERP.T.O.SHAFT

- 13 -Fig. 4-16AIR CLEANERGOVERNOR LEVERROCKER ARMCRANKCASE CRANKSHAFT CONNECTING RODPISTON PINOIL PRESSURESWITCHPISTONOIL FILTERFUEL PUMPPISTON RINGC

- 14 -5. DISASSEMBLY AND REASSEMBLY5-1 PREPARATIONS AND SUGGESTIONSWhen disassembling the engine, memorize the locations of individual parts so that t

- 15 -5-3 DISASSEMBLY PROCEDURESFig. 5-2petSevomerotstraPserudecorpdnaskrameRsrenetsaF1niardlioenignEsgulpgnivomeryblioenigneniarD.esacknarcfoedishtob

EH65 '98 - 8© Copyright 1998 Robin America, Inc.940 Lively Blvd.  Wood Dale, IL 60191  Phone: 630-350-8200  Fax: 630-350-8212e-mail: sales@rob

- 16 -petSevomerotstraPserudecorpdnaskrameRsrenetsaF2stnemelednarevocrenaelcriA1#morfepiprehtaerbevomeR.daehrednilyc;mm11x23-01.scp33esabrenaelcriAFig

- 17 -petSevomerotstraPserudecorpdnaskrameRsrenetsaF4gnisuohrewolB .scp8;21x6M5knildnarevellortnockcohC 6MFig. 5-5CHOKECONTROL RODRETURNSPRINGWAVEDWAS

- 18 -petSevomerotstraPserudecorpdnaskrameRsrenetsaF6roterubraC.epipleufevomertsriftAhtiwgnolaroterubractuoekaT.gnirpsdordnadorronrevog.scp2;08x8MFig.

- 19 -Fig. 5-8petSevomerotstraPserudecorpdnaskrameRsrenetsaF7dnarevelronrevoGrevellortnocdeepS;revelronrevoG.reveltuoekatdnatlobevomeR;revellortnocdee

- 20 -TO STOP DIODESTEP 9STEP 10SPARKPLUG CAPPLUGTERMINALIGNITIONCOILM6 BOLT AND WASHERASSY : 2 pcs.IGNITIONCOILPLUGTERMINALSPARKPLUG CAPM6 BOLT AND W

- 21 -petSevomerotstraPserudecorpdnaskrameRsrenetsaF11selffabrednilyC)4#&3#,2#,1#(21X6MFig. 5-11CYLINDER BAFFLE #1STEP 11M6 FLANGEBOLT : 3 pcs.CYL

- 22 -petSevomerotstraPserudecorpdnaskrameRsrenetsaF21dlofinamekatnI;tunegnalf8M.scp431gulpkrapSSE6RPBroSE6PB:KGN)CY9NRroCY9N:NOIPMAHCro(Fig. 5-12INTA

- 23 -petSevomerotstraPserudecorpdnaskrameRsrenetsaF41revocrekcoR .scp4;21x6M51dorhsuPdnadaehrednilyCtfahsmrarekcoR.1mrarekcoR.2dnamrarekcorgnivomerne

- 24 -Fig. 5-14Fig. 5-15petSevomerotstraPserudecorpdnaskrameRsrenetsaF61sevlavtsuahxe&ekatnIrevocrehtaerBetalprehtaerBSPRINGRETAINERCOLLET-VALVEVA

- 25 -M18 NUT : 1 pce.SPRING WASHERWASHERRING GEARFLYWHEELSTEP 17STEP 18CHARGE COILM5 BOLT ANDWASHER : 4 pcs.Fig. 5-17Fig. 5-16Fig. 5-18 Fig. 5-19petS

CONTENTSSection Title Page1. SPEC

- 26 -Fig. 5-21Fig. 5-20GOVERNORSLEEEVEGOVERNOR GEARGOVERNORGEAR SHAFTWASHER : 2 pcs.GASKETMAIN BEARING COVERM8 FLANGEBOLT : 10 pcs.STEP 19THRUST BEAR

- 27 -Fig. 5-23CAMSHAFTFig. 5-22STEP 20TAPPETTAPPETCAMSHAFTpetSevomerotstraPserudecorpdnaskrameRsrenetsaF02teppatdnatfahsmaCnohtobsgnikramehtetaMraegt

- 28 -Fig. 5-24petSevomerotstraPserudecorpdnaskrameRsrenetsaF12dorgnitcennoCdnanotsiPpilcnipnotsiP*nipnotsiP*sgnirnotsiP*.stlobdorgnitcennocevomeR.1.p

- 29 -Fig. 5-25petSevomerotstraPserudecorpdnaskrameRsrenetsaF32esacknarCpmupliO*retlifliO*hctiwserusserpliO*retlifpmupliO*llab&gnirpsfeilerliO*ret

- 30 -5-4 REASSEMBLY PROCEDURES5-4-1 PRECAUTIONS FOR REASSEMBLY1) Clean parts thoroughly before reassembly.Pay most attention to cleanliness of piston

- 31 -B. CYLINDER HEAD, VALVES and ROCKER ARM(1) Attach oil seal only onto intake valve guide.(2) Apply oil to washer, valve spring and valve stem.Pla

- 32 -Fig. 5-30C. PISTON and CONNECTING ROD(1) Install oil ring first, then second ring and top ring. Spread ring only far enough to slip over piston

- 33 -Fig. 5-31Note:Apply enough oil to bearing portion ofcrankcase. For easy installation, putcrankcase on box or wood blocks.Fig. 5-33Note:* The &qu

- 35 -5) MAIN BEARING COVER(1) Put a oil seal guide onto PTO shaft portion to avoid damaging the main bearing cover oil seal.(2) Place gasket onto the

Section Title Page7. LUBRICATION

- 36 -(3) Insert push rods into the concave portion of tappet and set the other end to the concave portion ofrocker arm adjust screw with valve spring

- 37 -10) ROCKER COVERInstall rocker cover with new gasket.11) BREATHER PIPE and COVERAttach breather plate (breather valve) and breathercover to cran

- 38 -14) STARTER MOTORInstall starter motor.15) CYLINDER BAFFLEAttach cylinder baffle #1, #2, #3 and #4.16) INTAKE MANIFOLDSet gasket (stainless stee

- 39 -19) CARBURETORSet gasket onto intake manifold and install carburetor.20) GOVERNOR LEVERAttach governor rod and rod spring betweengovernor lever

- 40 -21) SPEED CONTROL LEVERInstall speed control bracket onto intake manifold.Attach return spring, spacer, friction washer, wing nut, etc. to spee

- 41 -22) ADJUST GOVERNOR SYSTEM(1) Push speed control lever all the way to thehigh speed position and fix it by tightening nut.(2) Check that govern

- 42 -26) OIL PRESSURE SWITCHInstall oil pressure switch onto crankcase.27) OIL FILTERApply oil to O-ring and install oil filter by tighten-ing about

- 43 -30) Refill engine oil and start the engine. Engineoil will be lubricated oil passages and oil filter.Check the engine oil level and refill again

- 44 -6. MAGNETO6-1 OPERATION AND FUNCTIONThe ignition system is pointless flywheel magneto with automatic advancing characteristic.Being different fr

- 45 -(2) At lower engine revolution, when the flywheel reached the ignition point the low speed ignition timingcontrol circuit operates to run the ba

- 1 -1. SPECIFICATIONSSpecifications are subject to change without notice.LEDOMD36HED46HED56HEepyT,rednilyCniwT-V,ekortS-4,delooC-riAenignEenilosaGVHO

- 46 -7. LUBRICATION SYSTEM7-1 OPERATION AND FUNCTION* Full lubrication system is adopted, in combination with large-size torchoid oil pump and cartri

- 47 -8. CARBURETOR8-1 OPERATION AND FUNCTIONAIRAIR VENT HOLECHOKE VALVEPILOT AIR JETMAIN AIR JETFLOATNEEDLE VALVEFUEL INLET PIPEFUELMAIN NOZZLETHROTT

- 48 -8-1-1 FLOAT SYSTEMThe float system is consists of a float and a needle valve, and maintains a constant fuel level duringengine operation.The fue

- 49 -8-2 COMPORNENT PARTSFig. 8-2 1. BODY, lower 2. GASKET, body upper 3. BODY, upper 4. LEVER ASSY, choke 5. SPRING, choke 6. SHAFT ASSY, chok

- 51 -9-2 COMPORNENT PARTSFig. 9-3THROUGH BOLT (2 pcs.)BRUSH HOLDERARMATUREBRUSH (4 pcs.)YOKE ASSEMBLYFRONT COVERPINION ASSEMBLYPINION RETURN SPRINGP

- 52 -10. TROUBLESHOOTINGThe following three conditions must be fulfilled for satisfactory engine start.(1) The cylinder filled with a proper fuel-air

- 53 -10-2 STARTING DIFFICULTIESnonemonehPsesuacelbissoPydemeRenignewoL.1tadeepsgnitratsdegrahcsidyrettaB)1yrettabegrahCrotomretratsdnayrettabneewtebn

- 54 -10-4. OVERHEATnonemonehPsesuacelbissoPydemeRwoL.1noisserpmocgulpkrapsnesooL)1 teksagecalperronethgiteRegakaelteksagdaehrednilyC)2 teksagecalperr

- 55 -10-5. ROUGH IDLING10-6. HIGH ENGINE OIL CONSUMPTIONnonemonehPsesuacelbissoPydemeRroterubraC.1deepsgnildiwoL)1tsujdAdeggolcegassapmetsyswolsroter

- 2 -2. PERFORMANCE2-1 MAXIMUM OUTPUTThe maximum output is the output of an engine with its throttle valve fully opened under the condition thatall th

- 56 -10-7. HIGH FUEL CONSUMPTION10-8. DETONATIONnonemonehPsesuacelbissoPydemeRmetsysleuF.1tejniamezis-revO)1ecalpeRtaolfnilevelleufhgihro/dnaytluafev

- 57 -10-9. ENGINE MISFIREnonemonehPsesuacelbissoPydemeRnoitingI.1metsysedortceledegamadropaggulpkrapsrepprpmI)1 ecalperrotsujda,naelCytluafliocnoitin

- 58 -11. INSTALLATIONEngine life, ease of maintenance and inspection, frequency of checks and repairs, and operating cost all depend onthe way in wh

- 59 -12. SERVICE DATA12-1 CLEARANCE DATA AND LIMITSMETID56/D46/D36HEDTStimiLDAEHREDNILYCssentalF*htdiwtcatnoctaesevlaV*.aidedisniediugevlaV*sselro50.

- 60 -16 mmUnit : mm (in)METID56/D46/D36HEDTStimiLREDNILYC.aidedisnI*.gniroberretfassenidnuoR*.gniroberretfayticirdnilyC*DTS910.08-000.08)4051.3-6941.

- 61 -Unit : mm (in)METID56/D46/D36HEDTStimiLNOTSIPecnaraelcedisevoorggniR*elohnipnotsiP*.aidedistuonipnotsiP*trikstarednilycdnanotsipneewtebecnaraelC

- 63 -Unit : mm (in)METID56/D46/D36HEDTStimiLTFAHSMAC).XEdna.NI(thgiehmaC*.aidedistuolanruoJ*epyt"D"3.63-1.63)1924.1-3124.1(59.53)4514.1(089

- 64 -Unit : mm (in)METID56/D46/D36HEDTStimiLTEPPAT.aidedistuometS*.aidedisniediuG*ecnaraelcediugteppaT*579.8-069.8)3353.0-8253.0(39.8)6153.0(510.9-00

- 3 -2-4 PERFORMANCE CURVESEH63D2000 2400 2800 3200 36005(6.7)10(13.4)15(20.1)REVOLUTION r.p.mHORSEPOWERkW(HP)TORQUEN-m(kgf-m)45 (4.5

- 66 -12-3 OIL GRADE CHARTUse oil classified as SE or higher.Multi-grade oil tends to increase its consumption at high ambient temperature.5W10W20W#20

- 67 -13. MAINTENANCE AND STORAGE13-1 DAILY MAINTENANCEEvery day before operating engine, check the following items;13-2 PERIODIC MAINTENANCE SCHEDULE

- 68 -*Note 1 : Initial oil change and oil filter replacement should be performed after 20 hours of operation.Thereafter change oil every 50 hours and

- 69 -13-3 ENGINE STORAGE(1) Change the engine oil and perform the daily maintenance items above mentioned.(2) Drain fuel from carburetor float chambe

PRINTED IN THE USA

- 4 -EH64D2000 2400 2800 3200 36005(6.7)10(13.4)15(20.1)REVOLUTION r.p.mHORSEPOWERkW(HP)TORQUEN-m(kgf-m)45 (4.59)35 (3.57)CONTINUOUSR

- 5 -EH65D2000 2400 2800 3200 36005(6.7)10(13.4)15(20.1)REVOLUTION r.p.mHORSEPOWERkW(HP)TORQUEN-m(kgf-m)45 (4.59)35 (3.57)CONTINUOUSR