User manual

G
20 CARSON Virus 4.0 Chassis Nitro 500204031 / 500202016
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Enginebreak-inisthemostimportantsteptoassuringthatyour
engineisfastandreliablethroughoutitslife.Putsimply:DON’TSKIP
THIS PART!
Theengineispre-setfromthefactoryforbreak-in.Usea“FATBONE”
500905034orplatformandplacethecarsothatthewheelsareoff
the ground and free.
Makesurethethrottleissetatneutralwithyourradio.Placetheglow
heater onto the glow plug and give the recoil a sharp pull (picture 4).
Donotpullitmorethantwelveinches!Morethanthatmaybreakthe
cordandthisisnotcoveredunderwarranty.Itisbettertogivethe
recoil short sharp pulls rather than long ones. If the pull-start cord
getsstuck,rotatetheflywheelalittlebitwithyourfinger.Thisshould
makethecordautomaticallyrecoil.Withinafewpulls,theenginewill
start with a good puff of smoke.
4
If the engine has trouble idling at the rich setting, turn the idle screw
clockwise 1/8th of a turn at a time. This will increase the idle allowing
thecartobreak-inproperly.Trytodothisinawell-ventilatedarea,
suchasyourdriveway.Unburnedoilfromthefuelwillaccumulate
under the exhaust, so be prepared. Let the car idle like this for 2 - 3
tanksoffuelcheckingtheenginetemperatureevery2minutes.Please
allowabreakof10–15inbetweenfillingthetanktoallowtheengine
tocooldown.Youshouldbeabletotouchtheheadoftheengine
withyourfingertipsanditwillbehot,butnotuncomfortablyso.
(Attention!Donottouch!)Ifitseemsveryhot,richen(turncounter-
clockwise)thehigh-endandlow-endneedles1/8thofaturn.Always
use small increments when making these kinds of adjustments.
Racer Tip:
Factory setting of carburettor:
Withthefollowingbasicadjustmenttheenginestartsimmediately,
runningperfectandrichenough(outsidetemperature8°C).
• Idlestopscrew:approx.1mmairgap;
• Highspeedneedlevalve:screwincompletely,thenopen4full
turns;
• Lowspeedneedlevalve(linking):flushwiththeedgeofthelinking
arm, then 1 full turn clockwise;
After run-in is finished the high speed needle valve should be open at
least 3 and 1⁄4 turns. A richer setup is better if outside temperature is
high.
5
6
Racer Tip:
Driveyourcarslowlywiththerichsettingshortlyafterthebreak-in
periodavoidingprolongedperiodsatfullthrottle.Graduallyleanout
themixture1/8ofaturnatatime.Theidlewillincreasethemoreyou
lean the engine out.
rich
low
RPM
lower
high
RPM
rich lower