
2 3
Introduction
We hope you operate this RC model in a safe, reasonable and cau-
tious fashion in order to enjoy your vehicle. Should you operate
this vehicle without a cautious and reasonable approach it may
result in serious injury and/or property damage. Only you can
control and make certain that safety precautions and instructions
are followed.
General:
• THISPRODUCTISSUITABLEFORCHILDREN14YEARS
OROVER.THISPRODUCTISNOTATOY.Thisproductis
not intended for use by children without direct adult
supervision.
• ThisRCvehicleisnotintendedforuseonpublichighways
or roads.
• Avoidanareathathasmanypedestriansorcrowds
of people.
• Keepinmindthatthisvehicleisradiocontrolledand
can experience moments of radio loss or interference, so
provide for a margin of error at all times.
• Pleasebeawarethatthemotorandbatteriesofthis
RCvehiclewillgetHOTduringeachuse.Becarefulnot
to burn yourself.
Electronic Speed Control (ESC):
• Readallsafetyprecautionspriortoeachuse.
• Neverleavethevehicle/ESCunsupervisedwhileitis
switched on, in use or connected to a power source. If
there is a short circuit or product defect, it could result in
re.
• Ifthereareexposedwires,donotusetheESCuntilyou
have installed shrink-wrap or replaced the wire.
• DisconnectthebatteryfromtheESCafteruse.
• TheESCisnotwaterproofandshouldnotbeexposed
to moisture.
• Do not attempt to use LiPo batteries or more than
6-cells NiMH batteries; doing so will damage the ESC
and could result in re.
• AlwaysturnonthetransmitterrstthentheESCto
prevent an out-of-control vehicle.
• WhensettingyourElectronicSpeedController:
º Pleasedisconnectmotororremovethepiniongear
duringESCsetuporcalibrationfunctions.
º Keeplooseclothing,hair,glovesandngersaway
from moving parts at all times.
º Rubber tires can cause severe injury if there is a
failure while running the vehicle while on a stand or
whenbeingheld.Ensurerubbertiresaresecurely
mounted to the rims and if not, re-glue them and
check them often for security.
Introduction .................................................................................................2
SafetyPrecautions ......................................................................................3
Battery/Charging ........................................................................................3
SuppliedandRequiredEquipment .....................................................4
Technical Overview ................................................................................5-7
ESCOverview/Troubleshooting ............................................................8
TransmitterBatteryInstallation .............................................................9
VehicleBatteryInstallation ...................................................................10
Quick Start ..................................................................................................11
Losi 27MHz AM Radio System .......................................................12-13
Drivingthe1/10HIGHroller ..................................................................14
Tuning,AdjustingandMaintainingthe1/10HIGHroller ....15-18
Troubleshootingyour1/10HIGHroller .............................................19
Warranty Information ......................................................................20-21
RCTerminology .........................................................................................22
PartsListing .........................................................................................23-24
Optional parts Listing ......................................................................24-25
ExplodedViews .................................................................................. 26-29
Stock Setup Sheet ....................................................................................30
BlankSetupSheet ....................................................................................31
Introduction
ThankyouforpurchasingtheLosi®1/10HIGHroller.Weare
condent you will be satised with the performance of this
durable and resilient vehicle.
In the following pages you will nd all the information you will
needtosetupaswellasoperateyournew1/10HIGHrollerto
its full potential.
If you are an experienced RC hobbyist, or new to RC vehicles,
it will benet you to read all enclosed information.
Register your Losi Product Online
Registeryour1/10HIGHrollernowandbethersttondout
about the latest options parts, product updates and more.
Log on to WWW.LOSI.COM/REGISTER and follow the product
registration link to stay connected.
Losi/Horizon Support
If you have any questions concerning setup or operation of
your1/10HIGHroller,contacttheappropriateHorizonProduct
Support oce.
Hours:
MondaythruFridayfrom8:00amCSTto5:00pmCST
Getting Ready
Thoroughlyreadalltheenclosedmaterial,precautionsand
follow instructions to avoid damaging your new RC vehicle. If
you choose to not follow these steps or instructions, it will be
considered negligence.
Ifafterreviewofthismanualandpriortorunningyour1/10
HIGHroller,youdeterminethisRCvehicleisnotwhatyou
want—DONOTproceedandDONOTrunthe1/10HIGHroller.
Ifthe1/10HIGHrollerhasbeenrun,yourlocalhobbyshopwill
not be able to process a return or accept it for exchange.
Batteries and Charging:
•Readallinstructionsprovidedbythemanufacturerofthe
batteries prior to use.
•Neverleavethebatteryandchargerunattendedduringuse.
•Neverallowminorstochargebatterypackswithoutadult
supervision.
•Neverattempttochargedeadordamagedbatteries.
•Neverchargeabatteryifthecablehasbeenpinchedor
shorted.
•Neverallowbatteriesorchargertocomeintocontactwith
moisture at any time
•Neverchargebatteriesinextrememlyhotorcoldplaces
(recommendedbetween50--80degreesFahrenheit)or
place in direct sunlight.
•AlwaysuseonlyNiMHorNiCdrechargeablebatteries.
Chargers cannot charge batteries such as “heavy duty,”
“Alkaline battery,” or “Mercury battery.”
•Alwaysconnectthepositiveredlead(+)andnegativeblack
lead(-)terminalsofthebatterytothechargerterminals
correctly.
•Alwaysdisconnectthebatteryandchargerafterchargingand
let them cool between charges.
•Alwaysinspectthebatterybeforecharging.
•Alwaysmakesureyouknowthespecicationsofthebattery
to be charged or discharged to ensure it meets the
requirements of this charger.
•Neverconnectmorethanonebatterypacktothechargerata
time.
•Alwaysconstantlymonitorthetemperatureofthebattery
pack while charging.
•Alwaysendthechargingprocessifthechargerorbattery
becomes hot to the touch or starts to change form during
the charge process.
When charging NiMH batteries, select a charger to meet
your requirements. Chargers can be of two primary types for
theirsourceofpower;a100-240Vwallcharger,oronewhich
requiresa12Vpowersupply.Followthechargermanufacturer’s
instructions and precautions during each use.
NOTICE
All instructions, warranties and other collateral documents are
subject to change at the sole discretion of Horizon Hobby, Inc.
Forup-to-dateproductliterature,visit
http://WWW.LOSI.COM/SUPPORT
Meaning of Special Language
Thefollowingtermsareusedthroughouttheproduct
literature to indicate various levels of potential harm when
operatingthisproduct:
NOTICE:Procedures,whichifnotproperlyfollowed,createa
possibility of physical property damage AND a little
or no possibility of injury.
WARNING:Procedures,whichifnotproperlyfollowed,create
the probability of property damage, collateral
damage, and serious injury OR create a high
probability of supercial injury.
WARNING:ReadtheENTIREinstructionmanualtobecome
familiar with the features of the product before
operating.Failuretooperatetheproductcorrectly
can result in damage to the product, personal
property and cause serious injury.
ThisisasophisticatedhobbyproductandNOTatoy.Itmustbe
operated with caution and common sense and requires some
basicmechanicalability.FailuretooperatethisProductina
safe and responsible manner could result in injury or damage
totheproductorotherproperty.Thisproductisnotintended
for use by children without direct adult supervision. Do not
attempt disassemble, use with incompatible components or
augment product in any way without the approval of Horizon
Hobby,Inc.Thismanualcontainsinstructionsforsafety,
operation and maintenance. It is essential to read and follow all
the instructions and warnings in the manual, prior to assembly,
setup or use, in order to operate correctly and avoid damage or
serious injury.
Table of Contents
Safety Warnings and Precautions