Before operating this vehicle, please read all printed materials thoroughly.

Horizon Hobby is not responsible for inadvertent errors in this manual.

INSTRUCTION MANUAL

BEDIENUNGSANLEITUNG

MANUEL D’UTILISATION

MANUALE DI ISTRUZIONI

LASERNUT TENACITY ULTRA 4 ROCK RACER

1/10

th

Scale 4WD RTR

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, LLC. 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.

DSM or Spektrum technology.

NOTICE

All instructions, warranties and other collateral documents are subject to change at the sole discretion of Horizon Hobby,LLC. For up-to-date product literature, visit www.horizonhobby.com

As the user of this product, you are solely responsible for operating in a manner that does not

endanger yourself and others or result in damage to the product or property of others.

This model is controlled by a radio signal subject to interference from many sources outside

your control. This interference can cause momentary loss of control, so it is advisable to

always keep a safe distance in all directions around your model as this margin will help avoid

collisions or injury.

• Never operate your model with low transmitter batteries.

• Always operate your model in open spaces away from full-size vehicles, traffic and people.

• Never operate the model in the street or in populated areas for any reason.

• Carefully follow the directions and warnings for this and any optional support equipment

• Never lick or place any portion of the model in your mouth as it could cause serious injury

or even death.

seriously touching them.

• Do not put fingers or any objects inside rotating and moving parts, as this may cause

damage or serious injury.

• Always turn on your transmitter before you turn on the receiver in the car. Always turn off the

receiver before turning your transmitter off.

• Keep the wheels of the model off the ground when checking the operation of the radio

equipment.

SAFETY PRECAUTIONS AND WARNINGS

COMPONENTS ..................................................................................................................3

SPEKTRUM SMART TECHNOLOGY .....................................................................................3

TRANSMITTER BATTERY INSTALLATION .............................................................................4

SR6100AT AVC TECHNOLOGY TELEMETRY RECEIVER AUX CHANNELS ...............................5

DISABLING AVC

TECHNOLOGY STABILITY ASSIST.............................................................5

FAILSAFE ..........................................................................................................................5

SPECIFICATIONS ...............................................................................................................6

ESC LED STATUS ...............................................................................................................6

AUDIBLE WARNING TONES ...............................................................................................6

PRECAUTIONS ..................................................................................................................8

GEARING ......................................................................................................................... 8

CHANGING THE PINION GEAR/GEAR RATIO ......................................................................8

SETTING THE GEAR MESH .................................................................................................8

TELEMETRY SETTINGS ....................................................................................................... 8

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LASERNUT ULTRA 4 1/10 4WD RTR ROCK RACER • INSTRUCTION MANUAL

Your new Horizon Hobby vehicle has been designed and built with a combination of

waterproof and water-resistant components to allow you to operate the product in many

“wet conditions,” including puddles, creeks, wet grass, snow and even rain.

While the entire vehicle is highly water-resistant, it is not completely waterproof and your vehicle

should NOT be treated like a submarine. The various electronic components used in the vehicle,

section below must be performed regularly if you choose to run in wet conditions. If you are

not willing to perform the additional care and maintenance required, then you should not

operate the vehicle in those conditions.

GENERAL PRECAUTIONS

• Read through the wet conditions maintenance procedures and make sure that you have all

the tools you will need to properly maintain your vehicle.

• Not all batteries can be used in wet conditions. Consult the battery manufacturer before

use. Caution should be taken when using Li-Po batteries in wet conditions.

• Even minimal water contact can reduce the life of your motor if it has not been certified as

water-resistant or waterproof. If the motor becomes excessively wet, apply very light throttle

until the water is mostly removed from the motor. Running a wet motor at high speeds may

rapidly damage the motor.

• Driving in wet conditions can reduce the life of the motor. The additional resistance of

operating in water causes excess strain. Alter the gear ratio by using a smaller pinion or larger

spur gear. This will increase torque (and motor life) when running in mud, deeper puddles, or

any wet conditions that will increase the load on the motor for an extended period of time.

WET CONDITIONS MAINTENANCE

body removed, place the vehicle upside down and pull full throttle for a few short bursts

until the water has been removed.

away from rotating parts when performing the above drying technique.

water that may have gotten into small crevices or corners.

• Spray the bearings, drive train, fasteners and other metal parts with a water-displacing light

oil. Do not spray the motor.

• Let the vehicle air dry before you store it. Water (and oil) may continue to drip for a few hours.

• Increase the frequency of disassembly, inspection and lubrication of the following:

- Front and rear axle hub assembly bearings.

- All transmission cases, gears and differentials.

- Motor—clean with an aerosol motor cleaner and re-oil the bushings with lightweight

motor oil.

The Lasernut Ultra 4 includes Spektrum SMART Technology in the ESC and receiver, which can

like the DX5C (SPMR5100–transmitter only), DX5 Pro (SPMR5010–transmitter only), or DX5

gear. If you are using a 4S Li-Po battery, use the installed 12T pinion gear.

Using a 14T pinion gear with a 4S Li-Po battery will result in damage to

the ESC and motor.

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LASERNUT ULTRA 4 1/10 4WD RTR ROCK RACER • INSTRUCTION MANUAL

• Maintain sight of the vehicle at all times.

• Routinely inspect the vehicle for loose wheel hardware.

• Routinely inspect the steering assembly for any loose hardware. Driving the vehicle off-road

can cause fasteners to loosen over time.

resulting in loss of performance and potential fire when batteries are charged.

• Do not apply forward or reverse throttle if the vehicle is stuck.

Applying throttle in this instance can damage the motor or ESC.

• After driving the vehicle, allow the electronics to cool before driving the vehicle again.

1. Center the ST TRIM and TH TRIM dials on the transmitter.

2. Power on the transmitter.

3. Install a fully charged battery pack per the

section.

4. Power on the ESC.

shock collars to compress the springs.

2. Charge a battery pack. Always charge the battery pack as per the battery and/or charger

manufacturers’ instructions.

3. Set the transmitter steering trim. Follow the instructions to set the steering trim/subtrim so

that the vehicle drives straight with no input to the steering.

4. Perform a Control Direction Test.

®

The ST RATE dial adjusts the sensitivity, or stability, value in the receiver. If you increase the

sensitivity, the AVC

system becomes more sensitive to the vehicle drifting left or right. You

to a DSM

, DSM2

the steering dual rate.

Binding is the process of linking the SR6100AT receiver to your Spektrum transmitter. The AVC

features on the receiver can be enabled or disabled during the binding process.

regardless of AVC being enabled or disabled.

Upon initial setup after the first bind, the model must be configured for servo direction, trim

on the receiver remains lit. The receiver is now bound to the transmitter but must be

calibrated before it will operate.

4. Pull the transmitter trigger to full throttle, pause, then return the trigger to center.

5. Push the transmitter trigger to full brake, pause, then return the trigger to center.

6. Turn the transmitter steering wheel to full right, pause, then return the wheel to center.

7. Turn the transmitter steering wheel to full left, pause, then return the steering wheel to

center. The orange LED flashes to confirm the settings have been accepted.

8. Turn off the vehicle to complete the binding and calibration process.

• Change the travel after binding

To turn off AVC technology:

1. Connect power to the receiver and quickly press and release the bind button three times

(within 1.5 seconds).

2. Press and hold the bind button and to put the receiver in bind mode. release the buton

when the LED starts to flash rapidly, indicating it is in bind mode.

When the AVC system has been disabled, the LED on the receiver will show three flashes

upon power up, and then remain lit. The receiver is bound and operating normally when the

LED remains illuminated.

Inhibited, AVC functions will default to the AUX 1 and AUX 2 operation, and in this scenario,

Failsafe will NOT activate in the event that receiver battery power decreases below the

recommended minimums or power to the receiver is lost.

The Aux channels can operate as additional servo channels, or as a power supply

for a personal transponder.

If AVC is active, only 4 channels; Steering, Throttle, AUX3 and AUX4 are operational.

The reaming Aux channels can be used to power a personal transponder or lights.

If AVC is disabled (see DISABLING AVC TECHNOLOGY STABILITY ASSIST FUNCTION),

Steering Port

FULL THROTTLE

The largest factor in run time is the capacity of the battery pack. A larger mAh rating increases

the amount of run time experienced.

The condition of a battery pack is also an important factor in both run time and speed.

The battery connectors may become hot during driving. Batteries will lose performance

• Change the gearing to a lower ratio. A lower ratio decreases the operating temperature

of the electronics. Use a smaller pinion gear or larger spur gear to lower the gear ratio.

• Use a battery pack with a higher mAh rating.

• Use the optimum charger to charge battery packs (Visit your local hobby dealer for

more information).

Perform a control test with the vehicle wheels off the ground. If the wheels rotate after the

vehicle is powered ON, adjust the TH Trim knob until they stop. To make the wheels move

forward, pull the trigger. To reverse them, wait for the wheels to stop, then push the trigger.

When moving forward, the wheels should maintain a straight line without any steering wheel

on the transmitter. The LED flashes rapidly, indicating programming mode is active.

2. Throttle End Point: Continue holding full throttle. Turn the TH TRIM knob to adjust the full

throttle end point.

3. Brake End Point: Hold the trigger in the full brake position. Turn the TH TRIM knob to adjust

the full brake end point. Return the trigger to the center position.

4. Left Steering End Point: Hold the steering wheel in the full left position. Turn the ST TRIM

knob to adjust the left end point.

5. Right Steering End Point: Hold the steering wheel in the full right position. Turn the ST TRIM

knob to adjust the right end point. Return the steering wheel to the center position.

6. Power off the transmitter to save the travel adjust settings.

The minimum Travel is 75%, and the Maximum travel is 150%.

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LASERNUT ULTRA 4 1/10 4WD RTR ROCK RACER • INSTRUCTION MANUAL

programming mode.

five seconds

number of times the green LED flashes equals the programming item number given in the

programming table.

6. When at the desired programming item, press and hold the set button until the red LED

flashes to select the item.

7. Press and release the SET button to cycle through the values available for the programming

item based on the number of times the LED flashes. Refer to the programming table.

8. Save the setting by pressing and holding the SET button for 3 seconds.

• Always let parts cool before touching.

GEARING

Your vehicle has been equipped with the optimal gearing installed for the use of a 4S battery.

It offers an ideal balance between speed, power and efficiency. Should you decide to

customize your vehicle with a 3S battery it is necessary to change to the 14T pinion (included).

Installing a pinion gear with fewer teeth or a spur gear with more teeth will provide greater

torque but will reduce top speed. Likewise, a pinion gear with more teeth or a spur gear with

fewer teeth will reduce torque and increase top speed. Care should be taken when installing

larger pinion gears as this can "overgear" the vehicle, resulting in overheating of the motor

and ESC. When testing different gearing options, pay close attention to the temperature

2. Loosen the set screw and remove the installed pinion gear.

3. Loosen the motor screws and slide the motor back.

4. Place the new pinion on the end of the motor shaft so the set screw is located

over the flat on the shaft.

5. Position it so the teeth line up with the spur gear and secure the pinion by tightening

the set screw.

6. Set the gear mesh.

™

™

motors or gears.

the spur gear for a small amount of movement.

5. Install the gear cover.

using a 4S Li-Po battery, use the installed 12T pinion gear. Using a 14T pinion gear with a

4S Li-Po battery will result in damage to the ESC and motor.

TELEMETRY SETTINGS

If using the Spektrum Dashboard app or the optional speedometer module on your

transmitter, set the motor pole count to 4 and the rollout distance to 1.5" (38.1mm).

PROBLEM POSSIBLE CAUSE SOLUTION

Vehicle does not operate

Steering does not work

Will not turn one direction Servo gears damaged Replace or repair servo

Motor does not run

ESC gets hot

Poor range and/or glitching

Horizon Hobby, LLC, (Horizon) warrants to the original purchaser that the product purchased (the

“Product”) will be free from defects in materials and workmanship for a period of 2 years from

the date of purchase.

This warranty is not transferable and does not cover (i) cosmetic damage, (ii) damage due

OR REPRESENTATION, AND HEREBY DISCLAIMS ANY AND ALL IMPLIED WARRANTIES,

INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF NON-INFRINGEMENT,

MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE PURCHASER

ACKNOWLEDGES THAT THEY ALONE HAVE DETERMINED THAT THE PRODUCT WILL SUITABLY

MEET THE REQUIREMENTS OF THE PURCHASER’S INTENDED USE.

Horizon’s sole obligation and purchaser’s sole and exclusive remedy shall be that Horizon

will, at its option, either (i) service, or (ii) replace, any Product determined by Horizon to be

defective. Horizon reserves the right to inspect any and all Product(s) involved in a warranty

claim. Service or replacement decisions are at the sole discretion of Horizon. Proof of purchase

is required for all warranty claims. SERVICE OR REPLACEMENT AS PROVIDED UNDER THIS

WARRANTY IS THE PURCHASER’S SOLE AND EXCLUSIVE REMEDY.

BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Further, in no event shall the liability

of Horizon exceed the individual price of the Product on which liability is asserted. As Horizon

has no control over use, setup, final assembly, modification or misuse, no liability shall be

assumed nor accepted for any resulting damage or injury. By the act of use, setup or assembly,

the user accepts all resulting liability. If you as the purchaser or user are not prepared to

accept the liability associated with the use of the Product, purchaser is advised to return the

Product immediately in new and unused condition to the place of purchase.

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LASERNUT ULTRA 4 1/10 4WD RTR ROCK RACER • INSTRUCTION MANUAL

Sales

websales@horizonhobby.com

800-338-4639

Horizon Technischer Service

service@horizonhobby.eu

+49 (0) 4121 2655 100

Hanskampring 9

D 22885 Barsbüttel, Germany

Sales: Horizon Hobby GmbH

Once assembly, setup or use of the Product has been started, you must contact your local

distributor or Horizon directly. This will enable Horizon to better answer your questions and

service you in the event that you may need any assistance. For questions or assistance, please

visit our website at www.horizonhobby.com, submit a Product Support Inquiry, or call the toll

free telephone number referenced in the Warranty and Service Contact Information section to

speak with a Product Support representative.

If this Product needs to be inspected or serviced and is compliant in the country you live

and use the Product in, please use the Horizon Online Service Request submission process

found on our website or call Horizon to obtain a Return Merchandise Authorization (RMA)