HW30404850

Overview

The Hobbywing QuicRun Outer 1621SL 3500KV brushless motor is a purpose-built powerplant designed specifically for 1/24th scale RC crawlers and compact RC vehicles. This high-performance micro motor represents the pinnacle of compact motor engineering, delivering smooth, controllable power in an incredibly compact package that weighs just 16.7g. Whether you're exploring the world of miniature RC crawling or upgrading an existing 1/24th scale setup, this brushless motor offers the precision, reliability and performance you'd expect from a leading RC brand like Hobbywing. The motor is engineered to pair perfectly with the QuicRun WP-MINI24 ESC, creating a seamlessly integrated drivetrain that maximises both performance and ease of use.

If you're searching for a quality brushless RC motor for 1/24th scale vehicles in the UK, the QuicRun Outer 1621SL delivers professional-grade engineering in a size that fits the smallest RC crawlers. The 3500KV rating provides exceptional torque and control characteristics at low speeds, making it ideal for scale crawling where precision and smooth operation are paramount. This motor demonstrates why Hobbywing is recognised globally as a leader in RC electronics and power systems. The combination of advanced manufacturing techniques, precision balancing and thoughtful design features ensures that whether you're a seasoned competitor or new to micro-scale RC, you'll experience responsive, predictable performance.

Key Features

• Sensorless brushless design with 12-pole configuration — The motor uses brushless technology which eliminates the wear associated with brushed motors, delivering longer service life and more consistent performance over time. The 12-pole count provides excellent torque characteristics and smooth power delivery across the entire throttle range, making it ideal for precise low-speed control in crawling applications.
• Exceptional low-speed linearity with minimal vibration — The precision dynamically balanced rotor significantly reduces vibration and performance loss, ensuring excellent low-speed linearity and a smooth control experience. This engineering attention means you get predictable, responsive control at the crawling speeds where 1/24th scale RC truly excels, without the jarring vibrations that can make fine control difficult.
• Standard PH 2.0-3PIN male connector for seamless integration — The motor comes equipped with a standard PH 2.0-3PIN male connector, ensuring seamless plug-and-play functionality with the QuicRun WP-MINI24 ESC. This connector compatibility eliminates the need for adapters or soldering, making assembly straightforward and reliable, perfect for getting your RC setup operational quickly.
• Premium silicone wire outlet — Rather than traditional high-hardness enameled wire outlets, this motor features a silicone wire outlet that offers easier wiring and a more aesthetically pleasing finish. Silicone wire is more flexible and durable than enameled wire, making connections more reliable and the overall installation cleaner looking.
• Multiple mounting hole pitches for maximum compatibility — The motor includes three sets of M2 screw holes with 9mm, 10mm, and 12.5mm hole pitches, making it compatible with various motor base mounting diameters. This exceptional installation compatibility ensures the motor works with a wide range of chassis designs and motor mounts without requiring custom adapters or modifications.
• Low cogging torque for exceptionally smooth operation — The motor's low cogging effect and minimal torque pulsation ensure exceptionally smooth operation at low speeds, perfectly meeting the driver's need for precise, predictable control. Cogging can cause jerky, unpredictable behaviour at very low speeds, so minimising this effect is crucial for 1/24th scale crawling where smooth modulation is essential.
• Modular design for simple maintenance — The motor features a modular design that allows for direct disassembly, making daily cleaning and maintenance straightforward. This thoughtful design not only extends the motor's service life but also helps maintain optimal working efficiency, ensuring your motor continues performing at its best with minimal effort.
• Durable construction with high-performance materials — The motor utilises a high-performance iron core, 220°C high-temperature resistant enameled wire, and high-precision bearings to ensure consistently outstanding performance even during extended run times or in challenging conditions. These premium materials ensure the motor remains reliable and powerful throughout its service life.

Technical Performance

The QuicRun Outer 1621SL delivers impressive performance specifications in an incredibly compact 15.8mm diameter, 21mm length package weighing only 16.7g. The 3500KV rating combined with 2-3S LiPo battery compatibility means the motor develops a no-load current of just 0.6A, demonstrating exceptional efficiency. This brushless motor achieves a maximum output power of 39.1W with a current draw of 9.52A at peak power, providing explosive acceleration when needed whilst maintaining the smooth, controllable characteristics essential for 1/24th scale RC crawling. The 2.0mm shaft diameter and 9mm shaft length ensure compatibility with standard 1/24th scale drivelines and gearboxes, whilst the 12-pole brushless configuration provides smooth torque delivery without cogging. The precision-balanced rotor and low-cogging design mean you get responsive, predictable throttle response even at extremely low speeds where scale crawling happens. Built with high-temperature resistant enameled wire rated to 220°C and high-precision bearings, this motor handles sustained load without degradation. The sensorless brushless design works perfectly with modern ESCs like the QuicRun WP-MINI24, which offers programmable profiles, multiple protection systems and waterproof construction for reliable outdoor use. Whether you're running on a flat circuit or navigating challenging terrain in your 1/24th scale RC crawler, this motor delivers the performance and reliability you need.

What's in the Box

• Hobbywing QuicRun Outer 1621SL brushless motor (black)
• Pre-soldered PH 2.0-3PIN male connector
• Silicone connecting wires

What You Need to Complete

• Hobbywing QuicRun WP-MINI24 ESC (recommended for optimal compatibility)
• 2S or 3S LiPo battery pack
• 1/24th scale RC crawler chassis
• RC transmitter and receiver
• Battery charger compatible with LiPo batteries
• Servo (required for steering control)

Frequently Asked Questions

• Is the Hobbywing QuicRun 1621SL suitable for beginners to 1/24th scale RC? — Yes, absolutely. The low-speed linearity, smooth operation and precision control make this motor excellent for beginners. The plug-and-play PH 2.0 connector and compatibility with the dedicated WP-MINI24 ESC means you can build a complete system without complex soldering or configuration. The 3500KV rating provides controlled power delivery rather than explosive acceleration, making it easier to learn precise throttle control on this tiny scale.
• What battery does the QuicRun 1621SL need? — The motor is compatible with 2S and 3S LiPo batteries, meaning either 7.4V or 11.1V nominal voltage respectively. A 3S LiPo battery will provide maximum performance and output power of 39.1W, whilst a 2S battery offers more conservative power delivery ideal for learning. Most 1/24th scale crawlers run compact LiPo packs in the 1000-2000mAh range to fit within the chassis size constraints.
• Does this motor come ready to install? — Yes, the QuicRun Outer 1621SL comes with a pre-soldered PH 2.0-3PIN male connector and silicone wiring already attached, so it's ready for plug-and-play installation into your 1/24th scale chassis. The three sets of M2 screw holes with different pitches (9mm, 10mm, 12.5mm) mean it's likely to fit your existing motor mount without modification, though you should verify compatibility with your specific chassis.
• What is the difference between this motor and other 1/24th scale options? — The QuicRun 1621SL stands out through its precision dynamic balancing for smooth low-speed operation, low cogging torque for predictable control, multiple mounting hole pitches for wide compatibility, and purpose-designed partnership with the QuicRun WP-MINI24 ESC. The 3500KV rating is mid-range for 1/24th motors, offering a good balance between torque and top speed. The modular design also makes maintenance simpler than many competitors, and the high-performance materials including 220°C enameled wire and precision bearings ensure long-term reliability.
• Can I use this motor with ESCs other than the QuicRun WP-MINI24? — Whilst the motor is specifically optimised for the WP-MINI24, it can work with other sensorless brushless ESCs designed for micro-scale RC, provided they support the correct voltage range (2-3S LiPo) and have suitable current ratings for the motor's 9.52A peak current draw. However, you may not achieve the same level of integration and performance optimisation as using the recommended ESC combination.
• How long is the shaft and will it fit my 1/24th crawler? — The motor shaft is 2.0mm in diameter with a 9mm length, which is the standard specification for 1/24th scale RC crawlers. This should fit most modern 1/24th drivelines and gearboxes without modification, though older or custom builds may differ. Always verify shaft diameter and length against your specific chassis requirements before purchasing.
• What maintenance does this motor need? — The modular design allows you to disassemble the motor for cleaning and maintenance without special tools. Regular light cleaning to remove dust and debris will help maintain optimal efficiency. The high-precision bearings are sealed and require no special lubrication. The 220°C high-temperature resistant enameled wire and durable construction mean there's very little that needs maintenance under normal use.
• Is this motor waterproof? — The motor itself is not sealed against water immersion, though the high-quality construction means it tolerates moisture well. For serious water use, you should pair this motor with a waterproof ESC like the QuicRun WP-MINI24, which is fully waterproof and will protect your drivetrain during water-based RC crawling and play.

Why Buy from RC Model Shop?

RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the HOBBYWING QUICRUN OUTER 1621SL 3500KV MOTOR BLACK (1/24TH) HW30404850 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.