User manual

53
h) Break-in Instructions for the Motor
Whentakingthenewvehicleintooperation,thecombustionenginemustbesubjectedtoabreak-inphaserstbefore
you can start regular operation.
 Thisproceduredecisivelyinuenceslaterperformanceofthecombustionengineanditsservicelife.There-
fore, comply with our information on the break-in provision. Improper treatment of the combustion engine
may cause motor damage; loss of warranty/guarantee!
The following must be observed during initial breaking-in:
• Drivemostlyatlowrevolutions(notfullthrottle).
• Operatethemotorwitharichfuel-airmix.Thisisshownbystrongwhitesmokedevelopmentfromthemufer.
• Operatethevehicleinshortrunningtimeswithintermittentcool-downphases(approx.3min.each).
• Theentirerun-intime(realengineruntime)totalsatapprox.45minutes.Onlynowmusttheenginebeoperatedat
full output.
The addition of nitromethane to the model fuel increases the ignitability of the fuel and thereby the performance of the
engine. In the breaking in stage, use a model fuel with a small addition of nitro methane in order to avoid overheating
the engine. The fuel should also have a higher percentage of oil so that the lubrication of the engine is improved until
piston and cylinder liner are run in.
Inordertobeabletousethefullpowerspectrumlateron,theengineshouldhavetwotofourtankllingsata"rich"
carburettor setting and be run with changing throttle.
 Thecarburettorisperfectlypre-adjustedfortherstrunsexworks.Arichcarburettorsettingisusedtosup-
plythemotorsufcientlywithlubricationintherun-inphase.Thisisshownbystrongwhitesmokedevelop-
ment from the exhaust (burnt oil).
 Therichcarburettorsettingshouldbemaintainedfortherst2-4tankllings.Additionally,donotuseany
long full-throttle phases and run in the motor carefully with different speeds.
First run-in phase
• Leavetheplugstarterinsertedandlettheenginewarmupforapproximately1minutewithoutaccelerating.Ifneces-
sary,unscrewthemainjetneedlealittle(theowratewillbehigher).
• Removetheplugstarterafteraoneminutewarmingupphase.
• Driveforabout2-3minutesnowwithcoolingdownphasesofabout10minutesinbetween.Increasethespeed
slightly with short throttle bursts (no full throttle!).
The engine runs very roughly and the model moves unwillingly (do not let the motor run when standing but move the
vehicle; otherwise, there will not be enough cooling).
• Aftereachenginerun,allowforasufcientcoolingstage(10minutes).Thenthemixturecanbemadeleanerstep
by step by carefully turning in the main jet needle (no more than 1/16 turn each).