Stiga TM 60 - Page 13

- 13 -
strictlyassociatedwiththequalityoftheproductsusedandwiththescheduledmaintenance.
Thefollowinginformationallowabetterunderstandinganduseofyourengine.
4.1 ENVIRONMENTAL CONDITIONS
Theoperationofafour-strokeendothermicengineisaffectedby:
a) Temperature:
–Workinginlowtemperaturescouldleadtoadifcultcoldstarting.
–Workinginveryhightemperaturescouldleadtoadifculthotstartingduetotheevaporationofthe
fueleitherinthecarburetoroatchamberorinthepump.
–Inanycase,therightkindofoilmustbeused,accordingtotheoperatingtemperatures.
b) Altitude:
–Thehigherthealtitude(abovesealevel),thelowerthemaxpowerdevelopedbyanendothermic
engine.
– When there is a considerable increase in altitude, the load on the machine should be reduced and
particularlyheavyworkavoided.
4.2 FUEL
A good quality fuel is the major issue for the engine reliability of operation.
a)Useunleadedgasoline,withaminimumof90octane.
b)Useclean,freshfuel;purchasefuelinquantitythatcanbeusedwithin30days,topreventgumfrom
forminginsidethecontainerorthetank.
c)DonotusefuelwhichcontainsMethanol.
d)Donotaddneitheroilnoranykindoffueladditive.
4.3 OIL
Usealwayshighqualityoils,choosingtheirviscositygradeaccordingtotheoperatingtemperature.
a)UseonlydetergentoilclassiedSF-SG.
b) Choose the SAE viscosity grade of oil from this chart:
–from5to35°C=SAE30
–from-15to+5°C=5W-30or10W-30(Multi-viscosity)
–from-25to+35°C=Syntheticoils5W-30or10W-30(Multi-viscosity)
c)Theuseofmulti-viscosityoilsinhottemperatureswillresultinhigherthannormaloilconsumption;
therefore,checkoillevelmorefrequently.
d)Donotmixoilsofdifferentbrandsandfeatures.
e) SAE 30 oil, if used below +5°C, could result in possible engine damage due to inadequate
lubrication.
f)Oilshouldbeat«MAX»mark(see5.1.1):donotoverll.Overllingwithoilmaycause:
–Smoking;
–Sparkplugorairlterfouling,whichwillcausehardstarting.
4.4 AIR FILTER
Theairltermustalwaysbeinperfectworkingorder,topreventdebris,dirtordustfromgettingsucked
intotheengine,reducingtheefciencyandworkinglifeofthemachine.
a)Alwayskeepthelterelementfreeofdebrisanddirtinperfectworkingorder(see6.5).
b)Ifnecessary,replacethelteringelementwithanoriginalsparepart.Incompatiblelteringelements
canimpairtheefciencyandlifeoftheengine.
c)Neverstarttheenginewithoutmountingthelteringelementproperly.
4.5 SPARK PLUG
Notallthesparkplugsforendothermicenginesarethesame!
a)Useonlysparkplugsoftherecommendedtype,withtherightheatrange.
b)Checkthelengthofthethread,because–iftoolong–itwilldamagetheenginebeyondrepair.
c)Makesurethattheelectrodesarecleanandtheirgapiscorrect(see6.6).
5. STANDARDS OF USE
Beforeeveryuse,performthefollowingcheckingproceduresinordertoassurearegularoperation.
5.1.1 Check oil level
Seethespecicchapter(see8.1)fortheoiltobeused.
a) Place engine level.
b)Cleanaroundoilll.