Introduction
Thank you for purchasing the MODSTER Vector SR48 Brushed Electric Racing Boat 2S RTR. This manual provides essential information for the safe operation, setup, maintenance, and troubleshooting of your new racing boat. Please read this manual thoroughly before operating the boat to ensure optimal performance and safety.
The MODSTER Vector SR48 is a trendy 40 cm racing boat equipped with a powerful brushed motor. Its water-cooled motor system ensures efficient operation, and the body cover is easily removable for convenient battery changes. A key feature of this boat is its self-righting capability, allowing it to automatically flip back upright after capsizing. It supports both forward and reverse motion and can reach speeds of up to 30 km/h.
Safety Warnings
Failure to follow these safety instructions may result in injury or damage to the product or property.
- Never operate the model on public roads or thoroughfares as this could impede traffic and create hazardous situations.
- Never use the model in crowded areas, near or on people or animals to avoid property damage and/or personal injury.
- Always ensure the operating area is clear of obstacles and other watercraft.
- Do not operate the boat in saltwater, as this can damage internal components.
- Keep hands, hair, and loose clothing away from the propeller when the boat is powered on.
- Always disconnect the battery after use and before performing any maintenance.
- Supervise children at all times when operating the boat.
- Do not attempt to modify or disassemble the boat's electronic components.
Package Contents
Please verify that all items listed below are included in your package:
- MODSTER Vector SR48 Brushed RTR Racing Boat
- Integrated 390A Brushed Motor
- Integrated Motor Controller/Receiver
- Integrated 9g Steering Servo
- 2.4 GHz Transmitter (Remote Control)
- 2S LiPo Charger
- 2S 850 mAh 7.4V Lithium-ion Battery
- Boat Stand
- Instruction Manual (German and English)
- Spare Propeller
Note: You will need 1.5V Mignon (AA) batteries for the remote control (not included).
Setup
1. Charging the Battery
Before first use, fully charge the included 2S 850 mAh 7.4V Lithium-ion battery using the provided 2S LiPo charger. Follow the charger's instructions carefully. Do not overcharge the battery.
2. Installing Batteries in the Transmitter
Open the battery compartment on the back of the 2.4 GHz transmitter. Insert 1.5V Mignon (AA) batteries (not included), ensuring correct polarity. Close the battery compartment securely.
3. Installing the Boat Battery
Carefully remove the body cover of the boat. Connect the fully charged 2S Li-ion battery to the boat's power connector, ensuring a secure fit. Place the battery inside the designated compartment. Reattach the body cover securely to prevent water ingress.

Image: The MODSTER Vector SR48 Racing Boat placed on its stand on a wooden dock, with a hand holding the remote control nearby, illustrating preparation for operation.
4. Initial Inspection
Before placing the boat in water, perform a quick inspection:
- Ensure the propeller is free from obstructions and spins freely.
- Check that the rudder moves smoothly when the steering wheel on the transmitter is turned.
- Verify that the body cover is properly sealed.
Operating Instructions
1. Powering On
First, turn on the transmitter. Then, place the boat in the water. The boat's power system will activate automatically upon contact with water (water sensor activation). Ensure the boat is placed in water before attempting to operate it.
2. Basic Controls
- Throttle Trigger: Pull the trigger to move forward. Push the trigger to move backward (reverse).
- Steering Wheel: Turn the steering wheel left to turn the boat left, and right to turn the boat right.

Image: An illustrative diagram highlighting key features of the MODSTER Vector SR48, including its speed capability and Ready-To-Run (RTR) status, alongside the boat and remote control.
3. Self-Righting Function
The MODSTER Vector SR48 is designed with a self-righting feature. If the boat capsizes during operation, simply apply a small amount of throttle or steer the boat, and it will automatically flip back upright, allowing you to continue racing without manual intervention.

Image: A person carefully placing the MODSTER Vector SR48 boat into the water, illustrating the initial launch and the boat's self-righting capability.
4. Operating Environment
Operate the boat in calm, fresh water bodies free from debris, strong currents, or excessive wind. Avoid operating near swimmers, wildlife, or other watercraft. Maintain a clear line of sight to the boat at all times.
Maintenance
1. After Each Use
- Remove the boat from the water immediately after use.
- Disconnect the battery from the boat and remove it.
- Wipe down the boat's exterior with a soft, dry cloth to remove any water or debris.
- Ensure the internal compartments are dry. If water has entered, carefully dry it out.
- Allow the boat and battery to cool down before storing.
2. Propeller and Rudder Inspection
Regularly inspect the propeller for any damage or entanglement (e.g., weeds, fishing line). Clean as necessary. Check the rudder for smooth movement and ensure all linkages are secure.
3. Storage
Store the boat in a cool, dry place away from direct sunlight and extreme temperatures. Remove batteries from both the boat and the transmitter if storing for extended periods.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Boat does not respond to transmitter. |
|
|
| Boat moves slowly or lacks power. |
|
|
| Boat does not self-right. |
|
|
| Water inside the boat. |
|
|
Specifications
| Feature | Detail |
|---|---|
| Brand | MODSTER |
| Model Number | 282434 |
| Product Model Name | Vector SR48 Elektro Brushed |
| Color | Black |
| Dimensions (L x W x H) | 44.6 x 12.1 x 14 cm (17.56 x 4.76 x 5.51 inches) |
| Item Weight | 800 grams (1.76 lbs) |
| Material | Plastic |
| Motor Type | 390A Brushed Motor (Water-cooled) |
| Battery Type | 2S 850 mAh 7.4V Lithium-ion (Included) |
| Max Speed | Up to 30 km/h (18.6 mph) |
| Control System | 2.4 GHz Radio Control |
| Features | Self-righting function, Forward/Reverse capability |

Image: A detailed front-side view of the MODSTER Vector SR48 Brushed Electric Racing Boat, showcasing its sleek design and branding.
Warranty and Support
Information regarding specific warranty terms and conditions for the MODSTER Vector SR48 Brushed Electric Racing Boat is not provided in the product description. Please refer to the included physical instruction manual or contact MODSTER customer support directly for warranty details and technical assistance.
For further support, please visit the official MODSTER website or contact their customer service department using the contact information provided in the product packaging or on their official channels.





