1. Introduction and Overview
This manual provides essential information for the safe operation, setup, maintenance, and troubleshooting of your ARRMA Mojave GROM 4X4 223S BLX Brushless Small Scale Desert Truck. Please read this entire manual carefully before operating your vehicle to ensure proper function and longevity.
The ARRMA Mojave GROM is a ready-to-run (RTR) 4X4 small-scale desert truck designed for durability and performance. It features a brushless power system and includes a 2S LiPo battery and USB-C charger, making it suitable for various skill levels.
Key Features:
- Small-scale, bash-anywhere size.
- 2S and 3S ready, offering versatile speed potential.
- Spektrum DSC (Dynamic Stability Control) and throttle limiting for enhanced control.
- Includes 2S LiPo battery and USB-C charger.
2. Safety Information
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, LLC. The product 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.
3. What's in the Box
Your ARRMA Mojave GROM 4X4 223S BLX package includes the following components:
- (1) MOJAVE GROM 223S BLX 4X4 Small-Scale Desert Truck RTR
- (1) Spektrum SLT 25A 2-in-1 Brushless Waterproof ESC & Receiver 2S/3S with DSC
- (1) Spektrum 2838 4500Kv Brushless Motor
- (1) Spektrum SLT2 2-Channel 2.4GHz Transmitter with DSC
- (1) Spektrum Smart 7.4V 1400mAh 2S 30C Hard Case LiPo Battery w/IC2 Connector
- (1) Spektrum S10 Smart G2 Mini 2S USB-C Charger
- (4) AA Transmitter Batteries
- (1) Hex wrench
- (1) Instruction Manual
4. Setup
4.1 Battery Charging
Before first use, fully charge the included Spektrum Smart 7.4V 1400mAh 2S 30C LiPo battery using the Spektrum S10 Smart G2 Mini 2S USB-C Charger. Ensure you use a compatible USB power supply (not included) with QC 2.0/3.0 18W+ output for optimal charging.
4.2 Transmitter Preparation
Install the four included AA batteries into the Spektrum SLT2 2-Channel 2.4GHz Transmitter. Refer to the transmitter's specific manual for detailed binding and setup procedures if necessary, though the RTR package typically comes pre-bound.
5. Operating Instructions
5.1 Initial Operation
Once the battery is charged and installed in the vehicle, and the transmitter is powered on, you are ready to operate your Mojave GROM. Always operate in a safe, open area away from people, pets, and obstacles.
5.2 Dynamic Stability Control (DSC)
The integrated Spektrum DSC system assists in maintaining control, especially for new drivers, by helping to prevent loss of traction. Familiarize yourself with its effects in a controlled environment.
5.3 Throttle Limiting
The transmitter may feature throttle limiting settings. For beginners, it is recommended to start with a lower throttle limit to gain familiarity with the vehicle's handling before increasing speed.
6. Maintenance
Regular maintenance is crucial for the longevity and performance of your ARRMA Mojave GROM. After each use, inspect the vehicle for any damage or loose components.
- Cleaning: Remove dirt, dust, and debris from the chassis, suspension, and drivetrain. A soft brush and compressed air can be effective. Avoid using water directly on electronics.
- Inspecting Components: Check all screws, nuts, and bolts for tightness. Ensure suspension components, steering linkages, and wheel hubs are free of excessive play.
- Tire Wear: Monitor tire wear, as aggressive driving can cause rapid degradation. Replace tires when tread is significantly worn to maintain optimal traction.
- Servo Saver: The steering servo saver is a critical component. Inspect it regularly for proper function and ensure it is not damaged, as this can affect steering response.
7. Troubleshooting
7.1 Vehicle Not Responding / Limp Mode
If the vehicle enters a 'limp mode' or becomes unresponsive, first ensure the battery is fully charged and properly connected. Disconnect and reconnect the battery to reset the electronic speed controller (ESC) and receiver. Check for any obstructions in the drivetrain or steering mechanism.
7.2 Overheating
Continuous high-speed operation or running in hot conditions can lead to overheating of the motor or ESC. Allow the vehicle to cool down between runs. Consider upgrading to a larger cooling fan for the motor if frequent overheating occurs, especially when using 3S batteries.
7.3 Steering Issues
If steering is inconsistent or unresponsive, check the steering servo and its connections. Inspect the servo saver for damage or excessive wear. Ensure all steering linkages are free-moving and not obstructed.
8. Specifications
| Specification | Detail |
|---|---|
| Product Dimensions | 15 x 9.2 x 9.4 inches |
| Item Weight | 4.94 pounds |
| Model Number | ARA2304ST1 |
| Manufacturer Recommended Age | 14 years and up |
| Batteries Required | 4 AA batteries (for transmitter, included) |
| Release Date | October 24, 2024 |
| Manufacturer | Horizon Hobby |
9. Optional Upgrades and Accessories
To enhance performance or customize your Mojave GROM, several optional parts and upgrades are available:
- 3S LiPo Batteries: The vehicle is 3S ready for increased speed. Ensure any 3S battery used is compatible with the ESC and has the correct IC2 connector. Note that the included charger is for 2S batteries only; a separate 3S compatible charger or adapter may be required.
- Motor Cooling Fan: For sustained high-performance driving, especially with 3S batteries, a 25mm motor cooling fan can help manage operating temperatures.
- Body Armor: Additional body armor for the underside can provide extra protection during aggressive use.
- Tires: While stock tires are suitable for dirt, various aftermarket tires are available for different terrains and aesthetic preferences.
10. Warranty and Support
Your ARRMA Mojave GROM 4X4 223S BLX is manufactured by Horizon Hobby. For detailed warranty information, technical support, and replacement parts, please refer to the official Horizon Hobby website or contact their customer service directly.
You can also visit the ARRMA Store on Amazon for additional product information and accessories.
