Quick start guide – Losi LOSB0222T3 Manual User Manual
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EN
EN
Charging Warnings and Precautions
Failure to exercise caution while using this product and comply with the 
following warnings could result in product malfunction, electrical issues, 
excessive heat, FIRE, and ultimately injury and property damage.
•	 Read	all	safety	precautions	and	literature	prior	to	use	of	this	product.
•	 Never	leave	the	battery	and	charger	unattended	during	use.
•	 Never	attempt	to	dismantle	the	charger.
•	 Never	reverse	the	positive	and	negative	terminals.	Wrong	connection	
will damage the battery and may cause damage to the charger.
•	 Never	allow	minors	to	charge	battery	packs	without	adult	supervision.
•	 Never	drop	charger	or	batteries.
•	 Never	attempt	to	charge	dead	or	damaged	batteries.
•	 Never	attempt	to	charge	a	battery	pack	containing	different	types	of	
batteries.
•	 Never	charge	a	battery	if	the	cable	has	been	pinched	or	shorted.
•	 Never	allow	batteries	or	battery	packs	to	come	into	contact	with	
moisture at any time.
• Never charge batteries in extremely hot or cold places (recommended
between 50–80 degrees F) or place in direct sunlight.
• Always use only rechargeable batteries. This charger cannot charge
batteries such as “Heavy Duty”, “Alkaline”,“Mercury” or “Lithium” battery.
• Always connect the positive red lead (+) and negative black lead (-)
terminals of the battery to the charger terminals correctly.
• Always disconnect the battery after charging, and let the charger cool
between charges.
•	 Always	inspect	the	battery	before	charging.
•	 Always	terminate	all	processes	and	contact	Horizon	Hobby	if	the	
product malfunctions.
• Always keep batteries and charger away from any material that could
be affected by heat (such as ceramic and tile), as they can get hot.
• Always monitor the area, use a fire alarm and have a fire extinguisher
available at all times.
• Always make sure you know the specifications of the battery to
be	charged	or	discharged	to	ensure	it	meets	the	requirements	of	 
this charger. 
• Always constantly monitor the temperature of the battery pack
while charging.
• Always end the charging process if the charger or battery becomes
hot	to	the	touch	or	starts	to	change	form	(swell)	during	the	 
charge process.
Age Recommendation: Not for children under 14 years. This is not a toy.
Safety Precautions and Warnings
• Always keep a safe distance in all directions around your model to avoid collisions or injury. This model is controlled by a radio signal subject to interference
from many sources outside your control. Interference can cause momentary loss of control.
•	 Always	operate	your	model	in	open	spaces	away	from	full-size	vehicles,	traffic	and	people.
•	 Always	carefully	follow	the	directions	and	warnings	for	this	and	any	optional	support	equipment	(chargers,	rechargeable	battery	packs,	etc.).
•	 Always	keep	all	chemicals,	small	parts	and	anything	electrical	out	of	the	reach	of	children.
	•	 Always	avoid	water	exposure	to	all	equipment	not	specifically	designed	and	protected	for	this	purpose.	Moisture	causes	damage	to	electronics.
	•	 Never	place	any	portion	of	the	model	in	your	mouth	as	it	could	cause	serious	injury	or	even	death.
	•	 Never	operate	your	model	with	low	transmitter	batteries.
Before operating this vehicle, please read all printed materials thoroughly. Not responsible for errors.
Register your Losi Product Online
Register	your	vehicle	now	and	be	the	first	to	find	out	about	the	latest	option	parts,	product	updates	and	more.	 
Log	on	to	WWW.LOSI.cOM	and	follow	the	product	registration	link	to	stay	connected.
Table of Contents
Thank you for choosing the Losi
®
1/8-Scale Mini-Rock crawler. This guide contains the basic instructions for operating your new Mini-Rock crawler.
It is critical that you read all of the instructions in order to operate your model correctly and avoid unnecessary damage.
Use only Losi tools or other high-quality tools. Use of inexpensive tools can 
cause damage to the small screws and parts used on this type of model.
1. ChARgE bATTERy
2. INSTAll TRANSmITTER bATTERIES
3. INSTAll ChARgEd bATTERy INTo ChASSIS
4. Plug bATTERy INTo ESC
5. PoWER oN TRANSmITTER
6. PoWER oN vEhIClE
7. ChECk vEhIClE TRIm SETTINgS
Quick Start guide
Quick	Start	Guide ..........................................................................................3
Safety	Precautions ........................................................................................3
Charging	your	Batteries ................................................................................4
Installing	Batteries ........................................................................................4
Control Test...................................................................................................4
Resetting	the	ESC .........................................................................................6
Tools	and	Items	You	Will	Find	Handy ..............................................................6
The	Radio	System .........................................................................................6
The	Transmitter .............................................................................................7
Re-Binding	the	Transmitter	to	the	Receiver ...................................................7
Steps	to	Re-Bind	the	Receiver	to	the	Transmitter ..........................................7
Chassis	Tuning ..............................................................................................8
Slipper	Adjustments ......................................................................................8
Troubleshooting	Guide ..................................................................................8
Steering	Rate ................................................................................................9
Steering	Servo	Saver	Removal ......................................................................9
Changing	the	Pinion	Gear/Gear	Ratio ............................................................9
Setting	the	Gear	Mesh ..................................................................................9
Tuning	Tips ...................................................................................................9
Shock	Oil	and	Springs ...................................................................................9
Cleaning .......................................................................................................9
Exploded	View ............................................................................................12
Parts	Listings ..............................................................................................17
Optional	Parts .............................................................................................17
Limited	Warranty ........................................................................................18
FCC	Information ..........................................................................................18
Warranty	and	Service	Contact	Information ..................................................19
Compliance	Information	for	the	European	Union ..........................................19
Components
Mini-Rock	crawler
Losi
®
Radio System
8	AA	Batteries	(for	transmitter)
Losi	7.2V	1100mAh	NiMH	Battery	Pack	with	Mini	battery	connector
Losi	Ac	Wall	charger	with	Mini	battery	connector	(110V)
Tools Necessary
Soft	bristle	brush	for	cleaning
#0	or	#1	Phillips	screwdriver
optional Tools
LOSA99161	5.5mm	nut	driver	for	the	wheel	nuts	(optional)
LOSA99100	.050-inch	Hex	Wrench	(optional)
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LOSI MINI-ROCK CRAWLER • INSTRUCTION MANUAL
LOSI MINI-ROCK CRAWLER • INSTRUCTION MANUAL
WARNINg:	Read	the	ENTIRE	instruction	manual	to	become	familiar	with	the	features	of	the	product	before	operating.	Failure	to	operate	the	
product correctly can result in damage to the product, personal property and cause serious injury. 
 
This	is	a	sophisticated	hobby	product.	It	must	be	operated	with	caution	and	common	sense	and	requires	some	basic	mechanical	ability.	Failure	to	operate	
this	Product	in	a	safe	and	responsible	manner	could	result	in	injury	or	damage	to	the	product	or	other	property.	This	product	is	not	intended	for	use	by	
children	without	direct	adult	supervision.	Do	not	use	with	incompatible	components	or	alter	this	product	in	any	way	outside	of	the	instructions	provided	
by	Horizon	Hobby,	Inc.	This	manual	contains	instructions	for	safety,	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.
The following terms are used throughout the product literature to indicate various levels of potential harm when operating this product:
NoTICE: Procedures, which if not properly followed, create a possibility of physical property damage AND a little or no possibility of injury.
CAuTIoN: Procedures, which if not properly followed, create the probability of physical property damage AND a possibility of serious injury.
WARNINg: Procedures, which if not properly followed, create the probability of property damage, collateral damage, and serious injury OR create a high
probability of superficial injury.
NoTICE
All	instructions,	warranties	and	other	collateral	documents	are	subject	to	change	at	the	sole	discretion	of	Horizon	Hobby,	Inc.	For	up-to-date	product	
literature,	visit	horizonhobby.com	and	click	on	the	support	tab	for	this	product.
Meaning of Special Language
