DUROMAX XP7HPE User manual

GasolineEngine
Owner sManual
DuroMax CustomerService
ProductSupport (Product: information, application,serviceinfo&warrantyquestions)
Thismanualprovidesinformation regardingthe operation and maintenanceof theseproducts.
Wehavemade everyeffort toensurethe accuracy of the information inthismanual.
Wereservethe right tochange thisproduct at anytimewithout priornotice.
Pleasekeep thismanualavailabletoallusersduring the entirelifeofthe engine.
[email protected]
or call 844-DUROMAX Monday - Friday7amto5:00pm.PST
[email protected]
or call 844-DUROMAX Monday - Friday 7am to 5:00pm. PST

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CONTENTS
SAFETYPRECAUTIONS............................................................................................................................................2
BATTERYCONNECTION(electric-start type)..........................................................................................................4
ENGINEOIL...........................................................................................................................................................4
FUELAND FUELTANK........................................................................................................................................6
STARTING THEENGINE ............................................................................................................................................7
RUNNINGTHEENGINE..............................................................................................................................................8
EXHAUSTCONTROLSYSTEM.................................................................................................................................9
MAINTENANCE...........................................................................................................................................................10
MAINTENANCESCHEDULE............................................................................................................................10
SPARKPLUG ......................................................................................................................................................13
TRANSPORT,STORAGEAND REMOVALFROMSTORAGE...........................................................................15
TRANSPORT.......................................................................................................................................................15
STORAGE............................................................................................................................................................15
REMOVALFROMSTORAGE...........................................................................................................................16
TROUBLESHOOTING ...............................................................................................................................................17
PARTSDESCRIPTIONS ..............................................................................................................................................3
PRE-OPERATION INSPECTION................................................................................................................................4
OPERATING AT HIGH ALTITUDE......................................................................................................................9
SHUTTING DOWN.........................................................................................................................................................9
CHANGING THE ENGINEOIL..........................................................................................................................11
LOW OIL SENSOR.................................................................................................................................................8
CLEANING THE AIRCLEANER........................................................................................................................12
CLEANING THE DEPOSITCUP.......................................................................................................................13
CARBURETORIDLE ADJUSTMENT...............................................................................................................14
SPECIFICATIONS.......................................................................................................................................................17
I. STARTENGINEDIFFICULTLY......................................................................................................................17
SERVICE AFTER STORAGE............................................................................................................................16
IV. STOPS SUDDENLYWHENRUNNING......................................................................................................20
III. GASOLINEENGINEWILL NOT RUN SMOOTHLY.................................................................................19
EXPLODEDVIEWANDPARTSLIST(16HP)..........................................................................................................27
EXPLODEDVIEWANDPARTSLIST(7HP)............................................................................................................24
VI. THEREIS ABNORMAL NOISE WHENENGINERUNNING..................................................................21
V. GASOLINEENGINEISEXCESSIVELYHOT............................................................................................20
II. LOWGASOLINEENGINEPOWEROUTPUT...........................................................................................19
WIRING DIAGRAM.....................................................................................................................................................22

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SAFETYPRECAUTIONS
WARNING:
Beforeoperatingtheengine,be suretoreadand familiarwiththemanualcarefully,otherwise
personalinjuryorequipment damage mayproduce.
Pleasepayspecialattention tothe following:
1.Running the engine inawell-ventilated place,keep itatleastonemeterawayfrombuilding
wallsorotherequipments, keep awayfrominflammablessuchasgasoline, matchesandsoon
toavoidpossibilityof fire.
2.Keep the engine outof reachof childrenand petstoavoidaccidents.
3. Operatorof engine hasbeenspeciallytrained.
4.Refuelinawell-ventilated area withthe engine stopped,and inplacesrefueling orstoring
gasoline, no smoking and anyflamesorsparks.
5.Refuelthefueltanknottoo full soastoavoidfuel sspillingout. If thereisspilled fuelaround,be
suretoclean it thoroughlybeforestarting.
6.Locatetheengineon alevel-working platformtoavoidfuel sspillingout.
7.Makersurethefuelfillercap istightenedsecurely.
8.The exhaustmufflerisveryhotduringrunningthe engine even afterthe engine stops.Never
touchit, oryou mayget burns.Transportorstorethe engine withit cooling downentirely.

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PARTS DESCRIPTION
The mainpartsofenginearelocated asfollows

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BATTERYCONNECTION(electric-starttype)
Inthe casethatthe specificationsofthebatteryare 12V andmorethan 18A.h connectits
positivelead tothe electromagneticcoilwhileconnectitsnegativeleadtoengine mountstrew,
basescreworanyplacecapableof groundingwiththe engine well.
Makesurethe batteryleadsareconnected tightlyand nocorrosion isfound. If any, eliminateit.
WARNING:
The batterymaygiveoffexplosivegas;
keep sparks,flamesand cigarettesaway.
Charge oruseitinanarea withgood
ventilation.
The batterycontainssylphlikeacid
(electrolyte).Contactwithskinoreyes
maycausesevereburns.Wearprotective
clothingand afaceshield.
If electrolytegetsinyourskin,flushwith
water; if getsinyoureyes, flushwithwaterforat least 15minutesand callaphysician at once.
Electrolyteispoisonous.If swallowed,drinklarge quantitiesofwaterormilk,and followwith
milkof magnesiaorvegetableoiland oilaphysician.
Keep out ofreachof children.
CAUTION:
Donotadd tap watertothe batteryinsteadofdistilled water,orthe batterylifewillbe
short-need.
Donotadd distilled wateroverelectrolyteupperlevelmark,orelectrolytewillspill outtocorrupt
the engineparts. If so, be suretowashthemawaywithwater.
Makesurenottoconnectthebatteryleadsinreverseor-deer,orshort-circuitorbreaker s
cutting mayresult.
PRE-OPERATE INSPECTION
ENGINEOIL
CAUTION:
Engineoiliskeyfactorindecidingthe engine s
performance.Donotapplyengine oilwithadditives
or2-strokegasoline oil,astheyhaven tenough
lubrication,whichmayshorten theen-genesservice
life.
Check theengine withit
stopped on alevelground.
Engineoilrecommended:
SAE10W-30
Asviscosityvarieswith
regionsandtemperatures,
sothe lubricanthastobe

5
selected inaccordancewithourrecommendation.
Check
1.Ensurethatthe engine isstopped onalevelground.
2.Removethe dipstick and clean it.
3.Reinsert thedipstick intothe oilfillerwithout screwing it, andcheck oillevel.
4. If the oillevelistoo low, add the recommendedengine oilup tothe oilfillerneck.
5.Reinstallthedipstick.
CAUTION:Run withinsufficientengineoil maydamagetheengineseverely.
OILINTHEREDUCTIONGEARBOX(onlyforthemodel
equippedwithit) 1/2Reduction gearwithanauto-centrifugal
clutch
Brand of theboxoilisthe sameasthat of engine oil.
Oilcapacity:0.5litersfor190N,0.3litersfor170N.Check the oil
leverinthefollowing order.
1.Removethe dipstick and clean it.
2.Reinsertthedipstick withoutscrewing itin,andthen check
oillevel
.
3. If the oillevelistoo low,add the
recommended engine oil until itarrivesthe
upperlevelmark.
4.Reinstallthedipstick.
AIRCLEANER
I.Double-coretype
Dismantlethe aircleanerhousing andcheckits
filterelement, makesureitcleanand intact,
otherwisecleanorreplaceit.
II.Dust-collectingtype
1.Dismantlethe dust-collecting hoodand check
the filterelementofthe aircleaner;make
sureitisclean and intact, otherwiseclean or
replace.
2.Check whetherthereisanydust ordirtinside
the dust-collecting hood,if any, clearsaway.
III.Single-coretype

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Dismantletheaircleanerhousingandcheckitsfilterelement, makesureitisclean and intact,
otherwisecleanorreplace.
IV. Oil-bathtype
1.Dismantletheaircleanerhousingandcheck itscore,makesureitiscleanandintact,
otherwisecleanorreplace.
2.Check oillevelandoilquality.Ifthe oillevelistoo low,addtherecommended engineoilupto
oillevelmark.
CAUTION:
Neverrun theenginewithoutanaircleaner, orseverewearoftheenginemayresult.
FUELAND FUELTANK
Fuel
Toensurethattheenginerunssmoothlyuse onlyFRESH,UNLEADEDGASWITHAN
OCTANERATINGOF87ORHIGHER. Usingunleaded gasolinewilldecreasethe possibilityof
producing carbolldepositand willprolongtheengine sservicelife.Neverapplyusedorpolluted
gasoline oramixtureof gasoline withengineoil. Makesurethefuelisfree ofdirt and water.
GasolineContaining Alcohol
If youdecidetouseagasolinecontaining alcohol(fuelblend),besureitsoctanerating isatleast
ashigh asthatrecommended bythe company.Therearetwotypesof“gasohol”.One contains
ethanol,and theothercontainsmethanol.Neithergasoline containingmorethan 10%ethanolnor
5%methanolisallowed tobeused.If methanolcontentinthe fuelblend exceeds5%,it maybring
bad effecton theengineperformance, besides, it maydamage metals, rubberand plasticparts.
CAUTION: Handlefuelwithcarebecauseit change plasticand painted surface.
It isnormalwhen you hearoccasionallylight sparkknock orpinkingwiththe enginerunning under
heavy load.
If “sparkknock”or “pinking”occursatasteadyspeedundernormal load,changebrandof
gasoline;ifSuchphenomenastill happen,consultyourdealerforhelp, otherwise the
enginemaybedamaged.
FuelTank
Fueltankcapacity: 3.6litersfor170N, 6.5litersfor190N.

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Check
1.Removethe fuelfillercap andcheck fuellevel.
2. If the fuellevelistoolow,refuelthetank.Rememberadding
fuelnot overthefuelfillershoulder.
WARNING:
Gasolineisextremelyflammableandisexplosive
undercertainconditions. Refuelinginawell-ventilation
area withtheenginestopped. Donotsmokeandsmoke
andallowflames orsparks inthearea wheregasoline
isstoredorwherethefueltankisrefueled.
Donotoverfill thetank(thereshouldbenofuelinthe
fillerneck).Afterrefueling,makesurethefuelfillercap
issetback securely.
Becarefulnottospillfuelwhenrefueling.Spilledfuel
orfuelvapormayignite.Ifanyfuelisspilled,make
surethearea isdrybeforestartingtheengine.
Avoidrepeatedorprolongedcontactwithskinor
breathingoffuel vapor. Keepoutofreachofchildren.
STARTINGTHE ENGINE
1.Pushthe fuelcockto“ON”.
2.Pushthe chokeleverto “CLOSE”.
NOTE: if the engine ishot, closingthe chokeisunnecessary.
3.Moveleft thethrottleleveralittle.
4.Start the engine asfollows:
a)Hand-operatedkick-starterPushthe engineswitchto“ON”.Pullslightlythestartingropehandle

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up untilfeelinganti-action, and thenmakearapidpull.
CAUTION:
Releasingthe handlesuddenlymaymakeithittingthe
engine.Releasethe handleslowlyconforming toits
recoiling force.
b)Electricstarter
Pushthe engine switchto “START”and remainthere
until theengine starts. Oncetheenginestarts,resetthe
engine switchto “ON”.
CAUTION:
Usetheengineswitchnotmorethan5minuteseachtimetoavoid
damageoftheengine.Tryonce more10 minuteslaterafterlast
attemptfailures.
RUNNINGTHE ENGINE
1.Preheat theengineand pushbackthe chokeleverto “OPEN”.
2.Setthe throttleleverinproperposition toensurethe engine runs
at required velocity.
ENGINEOILALARM
The engine oilalarmisdesigned tofunction when the engine oilinthecrankcaseisinsufficient.
Lack ofengine oilmaydamage the engine.Oilmaydamage the engine.Onceoillevelinthe

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crankcaseistoolow,the engineoilalarmwillstall theengineautomaticallytomakeitfree of
damage whilethe engine switchisstillat “ON”.
CAUTION:
If cannotrestartthe engine, check the engine oillevelfirst beforego toothercheck items.
BREAKER(Electric-starttype)
The breakerwill cutoffautomaticallytoprotectthechargingcircuitofthebatteryinthecasethat
short circuitorincorrect connection of the batterypolesoccurs.
The green indicatorinthebreakerwilljumpoutwiththe circuitcutting off. Afterfinding troublesand
troubleshooting,depressthe breakerbutton totune thebreakeron.
OPERATING ONHIGHLANDS
Onhighlands,the standardmixtureratioisrelativelytoobigsothe engineperformancemaybe
impaired whilethefuelconsumptionmayincrease,besides,toobigmixtureratiowillpollutethe
sparkplugtoresultinstartingthe enginedifficultly.Thisproblemcan besolvedbyamending the
carburetortechnologicalstatus. Ifalways usingon highlandswithaheight abovesealevelof 1800
meters, ask yourdealerfordoing the job.
CAUTION:
Amended engine applicabletohighlandsmaybe damaged seriouslyinarea belowaltitude of1800
metersforoverheating,becauseitsmixtureratioistoo small foroperation inlowaltitude area.In
the case, askyourdealertorecoverthe enginetoitsnormaltechnicalstatus.
STOP
Inemergency, pushthe engine switchto “OFF”tostall the
engine; tostop itinnormal, do asfollows:
1.Pushright thethrottlelevertothebottom.
2.Pushthe engineswitchto “OFF”.
3.Set the fuelcockto “OFF”.
CAUTION:
Sudden stopping athigh speed underheavy load is
forbidden, otherwisedamage willresult.
EXHAUSTCONTROLSYSTEM
Withthe engine running, carbon monoxide, oxideof nitrogenandhydrocarbon willproduce, and in
certainconditions,oxide ofnitrogenand hydrocarbonwillreactchemicallyeachothertomake

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smokewhilecarbon monoxide istoxic, soexhaust controlof themisveryimportant. The company
decreasesthe exhaustemissionsbyintroducing poor-fuelcarburetorsand otherdevicesintothe
engine tosolvethe problem.
Tokeep the exhaustofyourengine withinthe standardexhaustemission,payattentiontothe
following:
1.Maintenance
Maintainthe engine
periodicallyinaccordance
withthe maintenance
scheduleinthe manual.The
maintenancescheduleis
made outon the baseof
normaluseinnormal
conditions,ifusing under
heavy load,dustyorwet
circumstancesorinhigh
temperature,serviceofthe
engine shouldbe done more
often.
2.ReplacementofParts
Werecommend thatyou
shouldchoosesuchpartswhicharemanufactured bythe companyorequivalent totheseinquality
asreplacementones.Replacementwithoutsohighqualityasthe originalmayimpairthe exhaust
the exhaust controlsystemineffectiveness.
3.Modifying
Modifying the exhaustcontrolsystemmaymakeactualexhaustemissionsexceeding statutory
limit values. Illegalmodification assuch:
a)Dismantleormodifyanypart of airintakeorexhaust system.
b)Modifyortakeoffspeed-adjusting connection deviceorspeed adjustmentdevicetoresultinthe
enginesrunning beyond the set parameters.
4.ProblemsAffectingExhaustEmissions
a)Difficult startingordifficult stopping.
b)Unstableidling.
c)Giveoff black smokeorconsumetoo muchfuel.
d)Poorignition sparks orsparks returned.
Onceyou findanyofaboveproblems, contactyourdealerforhelp.
MAINTENANCE
MAINTENANCESCHEDULE
Frequency
Item
Each
time First monthor
20 hrs
Each
season or
50 hrs
Every6
monthor
100 hrs
Each
yearor
300 hrs
Oillevelcheck √Engine oil Replace √√
Oillevelcheck √Reduction gear
oil Replace √√
PDFcreated withpdfFactoryProtrialversion www.pdffactory.com

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Check √
Clean √√②*
Aircleaner
Replace √**
Depositcup Clean √
Clean,adjust √Sparkplug Replace √
Sparkeliminator Clean √
Idling Check-adjust √②
Valveclearance Check-adjust √②
Fueltank&fuel
filter Clean √②
Fuelsupplyline Check Everytwoyears(do areplacement if necessary)
CAUTION:
Useonlypartsfromthe companyorequivalentsinquality; otherwiseengine damage mayresult.
NOTE:
*: onlyforinside-ventilatingdouble-corecarburetors.
**:onlyforpapercoreaircleaners.Everytwoyearsor600 hours laterfordustcollecting air
cleaners.
Moreoften thanthatinthe scheduleifindustycircumstances.
②Shouldbe done byyourdealerunless you arespeciallytrainedand iswellequippedwithtools.
WARNING:
Stallthe enginebeforeservice.Ifserviceisrequiredwiththe enginerunning,besuretokeepgood
ventilation inthearea.The exhaustemissionsfromthe engine containtoxiccarbon monoxide,
inbreathingofit mayresultinjuryand even death.
REPLACEMENTOFENGINEOIL
Astillhot engine ishelpfultodrainoutthe engine oilinthe crankcaserapidlyand entirely.

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1.Turnoffthe oilfillercap anddrainplug todrainengine oil
thoroughly. Reinstallthe drainplugand screwinsecurely.
2.Fillthe specifiedengineoilup tothe upperlevelmark.
3.Reinstalltheoilfillercap.
Engineoilcapacityinthe reduction gearboxis0.30.5liters,
engine oilcapacityinthe crankcaseis0.6(1.1)liters.
NOTE:
Donotdumpoil containersordiscarded engine oilintorubbish
boxesorontothe ground.Forthesakeofenvironmental
protection,wesuggestyoutakeindiscardedengine oilwitha
closedcontainerand bring tolocalrecycling station.
SERVICEOFAIRCLEANER
Adirtyaircleanermayblock enoughairsflowingintothe
carburetor.Tokeepthe carburetoringoodworking conditions,
pleaseservicethe aircleanerperiodically.If operating the engine
inextremelydustyarea,the job shouldbedonemoreoften.
WARNING:
Neverclean the aircleanercoreingasolineorlowflash-point
detergents, orexplosion mayhappen.
CAUTION:
Neverruntheenginewithout an aircleaner,orairwithdirtand dust mayentertheenginesospeed
the engineswear.
Dual elementtype
Unscrewthe wing nut,dismantlethe aircleanerhousing.
Check if the twocoresaredamaged, if so, replacewithnew
one.
a)Foamfilterelement: clean withhomedetergentsand
warmwater(ornon-flammableorhigh flash-pointcleansing
solvents)and dryup,then soakinclean engineoiluntil
saturated.Squeezeoutexcess oil,otherwise,the engine
willdischarge smokeinstarting stage.
b)Paperfilterelement: knock the coreagainstasolidplane
togetridofaccumulateddustorblowoutdust frominsideto
outsidewithhigh-pressureairflow(notmorethan 30psi).
Neverclean withabrush,asbrushingmayforcethe dust
intothe corefiber. If the coreisextremelyfilthy, replacewith
anewone.
Dust-collectingtype
1.Unscrewthe wingnut,dismantlethe aircleanerhousing,
check ifthe twocoresaredamaged,ifso,replacewithnew
one.
a)Foamfilterelement: clean withhomedetergentsand
warmwater(ornon-flammableorhigh flash-pointcleansing solvents)anddryup,then soakin

13
cleanengine oil untilsaturated.Squeezeoutexcess oil,otherwise,theenginewilldischarge
smokeinstarting stage.
b)Paperfilterelement: knock the coreagainstasolidplane togot ridof accumulated dust orblow
outdust frominside tooutsidewithhigh-pressureairflow(notmorethan30psi). Nevercleanwitha
brush,asbrushingmayforcethe dustintothe corefiber.Ifthecoreisextremelyfilthy,replacewith
anewone.
2.Clean the dust-collecting hood:screwoffthe three specialsemi-roundscrewsand removethe
hood, washpartswithwaterandthen dryup.Reinstallthehood.
CAUTION:
Whenreinstallingthe dust collecting coreaircleaner, makesuretoembed thefinon the pre-air
cleanerhood inthe dentinthe dust-collecting hood.
Installthe airguide incorrect order.
Single-coretype
1.Removethe wing nutand aircleanerhousing,and takeout the filterelement.
2.Clean withhomedetergents(orhigh flash-pointcleansing solvents)and warmwater,and dry
up.
3.Soakincleanengine oil until saturated; squeezeexcess oil,ortheengine willexhaustsmokein
starting stage.
4.Reinstallthefilterelement and aircleanerhousing.
Oil bathtype
1.Removethe nut and aircleanerhousing, and takeout thefilterelement.
2.Clean withhomedetergents(orhigh flash-pointcleansing solvents)and warmwater,and dry
up.
3.Soakincleanengineoiluntilsaturated.Squeezeexcess oil, ortheenginewilldischarge smoke
instarting stage.
4.Emptythe aircleanerhousing ofoil.Clearawaythe dustinsidewithnon-flammableorhigh
flash-point cleansing solvents, anddryitup.
5.Fillthe aircleanerhousingwiththe specified engineoilup tothe standardoillevelmark.
6.Reinstalltheaircleaner.
WASHING OFDEPOSITCUP
Setthe fuelcock at “OFF”,disconnectthe
depositcup andO-ring.Washinnon-flammable
orhigh flash-pointcleansing solvents,and then
trythemup,atlast, reinstallit. Setthe fuelcock
to “ON”and check forleaks.
WARNING:
Gasolineisextremelyflammableand explosive
incertaincondition.Keepcigarette,sparks and
open flamesaway.
Afterreinstalling thedepositcup, makesurethe areaaround theengineisdryenough.
SPARK PLUG
Sparkplug type: BPR6ES (NGK)orNHSPLDF6RTC

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Propersparkplug clearanceensurestheenginesnormalrunningunderno depositaround the
sparkplug. WarningBecarefulnottotouchthe mufflerduringorjustafterrunningthe
engine.
1.Removethe sparkplugcap.
2.Clearawaydirt around thesparkplug base.
3.Dismantlethe sparkplug withasparkplug
wrench.
4.Cleanwithasteelbrush.If theinsulatoris
damaged, replacethesparkpluginstead.
5.Measurethe sparkplug clearancewitha
feeler. The clearanceshouldbe 0.7~0.8mm.
If adjustmentisnecessary,bend theside
electrode carefully.
6.Check ifthesparkpluggasketisingood
conditions,orreplacewithanewone.Screw
on thesparkplug tothebottomfirstbyhand
and thenscrewinbyasparkplug wrench.If
anewsparkplugisused,twist1/2more
turnsafterimpacting the gasket, ifreinstall
the originalone,justtwist1/8-1/4more
turns.
CAUTION:
Thesparkplugmustbetightenedsecurely,oritmaybecomeveryhottodamagethe
engine.
Onlyuse recommendedsparkplugortheequivalent.Incorrectheatrangeofthespark
plugmaydamagetheengine.
CARBURETORIDLING
ADJUSTMENT
1.Start and preheat theengine untilarriving
at the normalworking temperature.
2. Obtainstandardidling byadjusting the
throttlefixing screwundertheengines
idling.Standardidling: 1700±150rpm.

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TRANSPORT, STORAGEAND REMOVALFROMSTORAGE
TRANSPORT
Transportwiththefuelcockturnedoff. Transportorstoretheenginewhen itiscoolsoastoavoid
getting burnsorfire.
CAUTION:
Donotincline the engine soastoavoidfuel sspill.Spilledfuelorfuelvapormayignitetocause
fire.
STORAGE
If the engine isnotkeptinuseforalong time,be suretostoreitproperly.Makesurethestorage
area isdryand free of dust.
1.Drainthe fuel...
a.Withthe fuelvalveinthe OFFposition, removeand emptythe sedi-ment cup.
b.TurnthefuelvalvetotheONpositionanddrainthegasoline fromthe fueltankintoasuitable
container.
c.Replacethesediment cup and tighten securely.
d.Drainthecarburetorbyloosening the drainscrew. Drainthegasolineintoasuitablecontainer.
WARNING: Gasoline isextremelyflammableand isexplosiveundercertainconditions.Donot
smokeorallowflamesorsparks inthearea.
2.Replaceengineoil.
3.Disconnectthe sparkplug.Fillaboutaspoon offreshengine oilfromthe sparkplugmounthole
intothe cylinder. Crankthe engine uptodistributeengineoilevenly. Reinstallthe sparkplug.
4.Pullthe starting rope slowlyuntilfeelingaslightanti-action,and thenkeep pulling itsoasto
alignthe arrowofthe starting sleevewiththe holeofthe starter.Atthistime,boththeinlet and
outlet valvesareclosedsohelpprevent theengineinside fromrusting.
5.Electricstarter:disconnectthe batteryand storeindryand coolarea.Charge onceevery
month.
6.Coverthe engine sokeep dust away.

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REMOVALFROMSTORAGE
Beforereusing, servicethe engine inaccordancewiththe instructionof thetable
STORAGETIME SERVICEITEM
Withinone month Non
One ~towmonths Drainoutoriginalfuelofthe fueltankand
refuel
Twomonth~one
year
Drainoutoriginalfuelofthe fueltankand
refuel;
Drainout fuelinthecarburetor ;
Emptythe deposit cup②
Aboveone year
Drainoutoriginalfuelofthe fueltankand
refuel;
Emptythe fuelcup inthe carburetor :
Emptythe deposit cup②
⑴Screwoff the drainplug anddrainout fuelinthe carburetor.
⑵Turnoff the engine switchfirst, disconnect the deposit cup andemptyit.
Note:forthe sakeofenvironmentalprotection,werecommend tofillthediscarded fuelintoa
closedcontainerand bring tolocalrecycling station. Neverpourfreely.
WARNING:
Fuelisextremelyflammableand explosiveundercertainconditions.Keep cigarette,open flames
and sparks awayfromoperating site.

17
SPECIFCAIONS
MAINSPECIFICATIONS
Model
Items XP7HP XP7HPE XP16HP XP16HPE
Engine type 4-strok,OHV,25°,single-cylinder, forceair-cooled
bore×stroke( ) 70×54 90×66 90×66
Rated
power(kW/rpm) 4.2/3600 8.5/3600 8.5/3600
Max.
torque(N·m/rpm) 13.2/2500 28.5/2500 28.5/2500
Displacement(ml) 208 420 420
Starting type recoil Electric
start recoil Electric start recoil Electric start
Ignition type Induction ignition
Lubricatingtype splashing
Fuelconsumption
(g/kW-h) ≤395 ≤375
Dryweight 33lbs. 35.3lbs. 73 lbs. 77 lbs. 73 lbs. 77 lbs.
Dimension(L×W×H
)(in.) 14.25×12.3×13.2 17.7×16×17.4
TORQUEOFIMPORTANTBOLTS
S/N Item Specifications Torque Value(N﹒m)
1 Cylinderheadbolt M8×1.25 24±2
2 Crankcasecoverbolt M8×1.25 24±2
3 Tie-rodbolt M7×1 12±2
4 Flywheelbolt 70~80
5 8~10
TROUBLESHOOTING
I.STARTENGINEDIFFICULTLY
1.Byusingkick-starter
TROUBLE CAUSE REMEDY
Thereisno enoughfuel
infueltankoffuelcockis
closed.
Fillfuel, openfuelcock.
Airventinthe fuelfiller
cap isclogged. Dredge airvent.
Fuelcock isclogged. Clean first andthendredge.
1.Normalcylinder
compression.
2.Normalsparkplug
spark.
3.Something wrong
withthe fuelsystem.
4.Fuelsupplyisnot
smoothorno fuelImproperorclogged main
oilflowhole. Readjust orclean, blowtogetthrough.

18
Needlevalveisnot
closedproperlyorstart
holeisclogged.
Dismantleneedlevalveand repair,clean,
blowtoget through.
supply.
Floatisdamaged or
sticking. Repairfloat
Fuelistoo filthyor
deteriorated Replace
Thereiswaterinfuel Replace
Too muchfuelinengine Drainextrafuel, dryup sparkplug
electrodes
1.Normalcylinder
compression.
2.Normalsparkplug
spark.
3.Something wrong
withthe fuel
system.
4.Smoothfuelflow.
Wrongfuelbrand Select properfuelbrandcorresponding
withthe requirements
Too muchcarbon deposit
and dirtaround
electrodes.
Clearaway
Electrodesareburn
damaged seriouslyor
insulatorsdamaged
Replacesparkplug
1.Normalcylinder
compression.
2.Normalfuel
supply.
3.Normal
high-pressurecoil
spark.
4.Sparkplug isin
bad conditions.
Improperelectrodesgap Adjust topropervalue
High-pressurecoilis
damaged Replace
Ignition coilisdamaged Replace
1.Normalcylinder
compression.
2.Normalfuel
supply.
3.Nohigh-pressure
coilspark.
4.Normalspark
plug.
Magnetoloses
magnetism Replace
Piston ring isworntoor
even overitswearlimit Replace
Piston ring isbroken Replace
Piston ring issticking Clearup carbon fouling
Sparkplug isnotinstalled
tighten orwithouta
gasket
Tighterwithagasketin
Airleakage between
cylinderblock and
cylinderhead
Check cylindergasket, and theflatness of
the surfacebywhichcylinderblock
contacting withcylinderhead, tighten
cylinderheadboltsinstipulated orderto
stipulated torque.
1.Poorcylinder
compression.
2.Normalfuel
supplysystem.
3.Normalignition
system.
Airleakage invalves Check valve, clearanceand tightness,
repairif necessary
WARNING:
Whentesting the sparkplug, neverholdthe high-voltage wireof the sparkplug withwet hand.

19
Makesurethereisno spilledfueloutside theengine andthatthe sparkplug isn tdipped with
fuel.
Toprevent fire, keep sparks farawayfromthe sparkplug mount hole.
2.Byusingstartingmotor
ITEM CAUSE REMEDY
Check batteryconnection Incorrect connection Correct
Check battery Nocharge orundercharge,
corrosion Check the breaker,charge up the batteryorreplaceit
Starting motorfunctions
normally Bethe sameaskick-starter Conductitinthe sameway of kick-starter
Havingfulfilledallthe check itemsabove,theengine still failstowork, contact yourdealerforhelp.
II.LOWGASOLINEENGINEPOWEROUTPUT
TROUBLE CAUSE REMEDY
Ignition
system Incorrectignition time Readjustignition advance angle
Airinfuelline orfuelline
clogged Exhaustairordredgefuel line
Mainoilflowholeisnot
adjusted properly Readjust
Incarburetor, needlevalvehole
and mainoilflowholeclogged Clean and blowtoget through
Fuelcock isclogged up Clean,replacedamaged
part
Too muchcarbon depositin
combusting chamber Clearaway
Too muchcarbon fouling in
mufflerand exhaust pipe Clearaway
Fuelsupply
system
Aircleanerisclogged up Clean aircleanerfilter
elemi
Intakepipe isleaking Repairorreplace
Piston orcylinderorpiston ring
isworn Replacethe worn
Airleakage fromthe surfaceby
whichcylinderblockcontacting
withcylinderhead
Replacecylindergasket
Too bigortoo smallvalve
clearance Readjust it
When turning
throttlegreater,
speed increase
respondsslowor
speed is
decreasedeven
engine stops
running
Poor
compression
Valvetightness ispoor repair
III. GASOLINEENGINECANNOTRUN SMOOTHLY
TROUBLE CAUSE REMEDY
Piston,cylinderorpistonring isworn
excessively Replacethe worn
Piston pinandpistonpinholeare
wornexcessively Replacepiston orpistonpin
Engine ispinging
Tierod smallheadiswornexcessively
Replacetierod