SEABORG G300JSEABORG G300J
Lightweight and sensitive: ‘TOUGH LIGHT MONSTER’ – high durability (G = 3-year motor warranty) / high power / lightweight at 575g / compatible with electric games

The TOUGH LIGHT MONSTER is based on the SEABORG 300J and offers even greater durability. At its heart is the MAGMAX-G motor (3-year warranty), delivering four times the durability of the base model. As a high-durability brush motor, it delivers a responsive rotation feel and powerful performance. In terms of operability, it features a clutch that synchronises with the motor’s ON/OFF function. The JOG winding position remains unchanged, offering a responsive start-up when the clutch is engaged and, when disengaged, allowing the motor to stop so you can detect bites whilst the lure is in the Fall. In terms of functionality, ‘Jigging Mode’, ‘Depth Alarm’ and ‘Electronic Drag Sound’ have been added. When reeling by hand, one handle rotation retrieves 83 cm, and the 75–85 mm adjustable handle arm allows for a Baiting action equivalent to that of the SALTIGA dual-axis models. The 3.0 mm inner diameter of the level wind ensures a reliable design capable of accommodating even a No. 30 Leader. With a tough setup suitable not only for higher-grade targets but also for electric Jigging, its weight of 575g makes it comfortable to hold, and this lightness translates into enhanced sensitivity.
DAIWA Technology

MAGMAX-G MOTOR
A slide-brush motor featuring special neodymium magnets, offering excellent responsiveness and durability.
It offers excellent burst power, whilst the motor’s durability is four times that of the previous MAGMAX model. Winding is entirely at the angler’s command. Furthermore, thanks to its high torque, slow reeling is a breeze.
* 3-year, 300 km motor warranty (new warranty certificate)
*FF MAGMIGHT Structure*
It offers excellent burst power, whilst the motor’s durability is four times that of the previous MAGMAX model. Winding is entirely at the angler’s command. Furthermore, thanks to its high torque, slow reeling is a breeze.
* 3-year, 300 km motor warranty (new warranty certificate)
*FF MAGMIGHT Structure*

JOG POWER LEVER
The power lever has been repositioned to the centre of the body, and its design has been changed from a lever to a jog dial style. This allows the angler to perform reeling and engage or disengage the clutch using just the thumb of the hand holding the Rod, completely freeing the other hand from operating the lever so that the angler can concentrate fully on handling the Rod. This flexible one-thumb operation enables precise control of the lever, allowing the angler to adjust the reeling speed at will.

MAGSEALED BALL BEARING
Using its proprietary technology, DAIWA has succeeded in becoming the first in the world to apply MAGSEALED technology to the ball bearing itself. A wall of magnetic fluid prevents water and foreign particles from entering the interior of the ball bearing, thereby significantly reducing rust, salt deposits and abnormal noises whilst maintaining the ball bearing’s inherent rotational performance.

ATD
The ATD operates smoothly in response to the fish’s pull and maintains a consistent drag. Designed to minimise slippage and ensure excellent tracking, it allows you to concentrate on the fight without having to worry about drag settings.
Other Features

FF structure
The front-motor design positions the motor—which could be described as the ‘engine’ of an electric reel—at the front of the spool, resulting in a low-profile reel that is comfortable to hold and easy to use. As the motor unit is more exposed to the outside air, this also contributes to improved cooling.
Product Details
■MAGMAX G MOTOR [MAGMAX G Motor] *3-year, 300 km warranty on the motor only

Featuring specialised neodymium magnets, this slide-brush motor offers excellent responsiveness and durability. It delivers outstanding burst power, whilst the motor’s durability is four times that of the conventional MAGMAX model. Winding is as effortless as the angler wishes. Furthermore, thanks to its high torque, slow reeling is a breeze.
* 3-year, 300 km motor warranty (new warranty certificate)
*FF Magmaite Structure*
* 3-year, 300 km motor warranty (new warranty certificate)
*FF Magmaite Structure*

■JOG POWER LEVER [Jog Power Lever]
Thanks to its aluminium machining, it offers excellent grip, making winding operations more comfortable even with wet fingers or whilst wearing gloves. Furthermore, compared to resin models, it allows for more precise control and intuitive hook-setting.
■ Comfortable one-handed operation
1. Clutch OFF
2. Clutch ON
3. JOG reeling
■MAGSEALED BALL BEARING [Magsealed Ball Bearing]
Used on the spool shaft on the side plate side, which is difficult to maintain and most prone to salt build-up. This helps to maintain the initial performance of the spool’s free-running action and winding efficiency.
ATD [Automatic Drag System]
A new-generation drag system that operates smoothly in response to the fish’s pull and maintains consistent drag performance. For compact spinning reels and electric reels, the focus is on achieving a smooth initial release and responsive tracking. For large spinning reels such as the SALTIGA, the system is designed to minimise any reduction in Drag Force during the fight. Both have been developed with the aim of allowing anglers to concentrate fully on the fight without having to worry about drag settings.
FF structure [FF structure]
The front-motor design positions the motor—which could be described as the ‘engine’ of an electric reel—at the front of the spool, resulting in a low-profile reel that is comfortable to hold and easy to use. Furthermore, the placement of the level-wind mechanism between the motor and the spool has enabled a more compact design.
FALL BRAKE DIAL [Fall Brake Dial]
A braking system that allows you to adjust the descent speed instantly. With a single thumb, you can control the spool from FREE to maximum braking across a 180-degree range. As well as preventing Backlash, it improves Bait presentation during the descent without the need to thumb the spool, enabling you to detect bites from Squid in the mid-water column during Bottom Fishing, and to catch bites from Fish during the Fall when Jigging.
DOT MONITOR COUNTER [Dot LCD Counter]
Large text that is easy to read in the field, with excellent visibility even in backlight conditions
*You can still see clearly even when wearing polarised sunglasses.
The on-screen prompts are clear, and you don’t need a manual to adjust the various settings
*Menu screen: Press and hold ‘PICKUP’ and ‘MEMO’ simultaneously for 2 seconds
Do not use the electric winding machine at depths of 00 or less ⇒ this eliminates the risk of the line becoming entangled
Display D-Vec when the power is switched on
*You can still see clearly even when wearing polarised sunglasses.
The on-screen prompts are clear, and you don’t need a manual to adjust the various settings
*Menu screen: Press and hold ‘PICKUP’ and ‘MEMO’ simultaneously for 2 seconds
Do not use the electric winding machine at depths of 00 or less ⇒ this eliminates the risk of the line becoming entangled
Display D-Vec when the power is switched on
Motor ON/OFF-linked clutch
When winding the JOG power lever
1) When the clutch is engaged ⇒ Winding starts at the set JOG value
2) When the clutch is disengaged ⇒ Motor stops / JOG setting is maintained
[Advantages]
1) Smooth winding start-up with good responsiveness when the clutch is engaged
2) Makes it easier to detect bites during the Fall
[Points to Note]
*Thanks to the reinforced clutch, ON/OFF operation is also possible during maximum winding.
*Can be operated at depths of 9 metres or more below the counter
*The automatic line feed mechanism will not operate (there is no automatic line feed setting)
Level Wind Compatible with Futoshi Shock Leaders
A level wind (inner diameter 3.0 mm) through which a PE No. 5 + Fluoro No. 30 FG knot passes with ease
*Suitable for tonjigi, yellowtail and amberjack jigging
Jigging Mode
You can choose from three basic auto-jerk (standard) patterns
1. Single-pitch Jigging (repeating a standard single-stage Jigging)
2. One-pitch pose (repeat the jerk pattern from 1 followed by a pause)
3. Combi-jerk (repeat a steady reeling followed by a single jerk)
*You can also set your own custom jerk patterns using the ‘Custom’ option.
*Pocket manual included
Depth Alarm
* An audible alarm sounds every 10 metres during Fall (FL) and winding (UP)
*Three patterns available for each
・FL/UP1: One alarm every 10 metres
・FL/UP2: 10m once, 20m twice, 30m three times, repeated
・FL/UP3: 1 x 10m, ... 5 x 50m (repeat)
・Can also be set to ‘OFF’
*Three patterns available for each
・FL/UP1: One alarm every 10 metres
・FL/UP2: 10m once, 20m twice, 30m three times, repeated
・FL/UP3: 1 x 10m, ... 5 x 50m (repeat)
・Can also be set to ‘OFF’
The sound of the drag being pulled out
*Three types of drag sound effects are available
・Pattern 1: High-pitched sound (factory setting)
・Pattern 2: Mid-range
・Pattern 3: Bass
・Can also be set to ‘OFF’
・Pattern 1: High-pitched sound (factory setting)
・Pattern 2: Mid-range
・Pattern 3: Bass
・Can also be set to ‘OFF’
IC Counter Menu
| Menu | Operations |
|---|---|
| Main Line Input | P1 / P2 / P3 |
| Sub-counter | Counter from the bottom / Winding speed display / Remaining winding time display |
| FUNE-side stop | 1 m to 5 m range |
| Jigging mode | 3 types / OFF |
| Quick Reeling / Stop / OFF | Quick Reeling / Stop / OFF |
| Drag sound | 3 types / OFF |
| Depth Alarm | 3 types / OFF |
| Alarm sound | ON / OFF |
| Constant-speed winding | ON / OFF |
| Timer winding | ON / OFF |
*Does not include a Fukase clutch |
ON / OFF |
| Water Depth Correction | Water Depth Counter Correction |
| Fishing History | Distance / Time Used |
| Language | Japanese / English / Traditional Chinese / Korean |
| Units | m/ft |
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Further details on features and specifications
| Features and Specifications | Features |
|---|---|
| Die-cast aluminium body | The high-rigidity, low-deformation aluminium body firmly supports the drive section, including the motor, to facilitate powerful fighting. |
| Infinite | A mechanism that eliminates play during manual reeling, delivering a smooth reeling feel similar to that of a manual reel. |
| Ultra Spool FREE | High-speed rig-dropping performance achieved by disengaging the gears between the spool and the motor unit to eliminate resistance to spool rotation. |
| Constant-Speed Winding Mode | A convenient feature that automatically adjusts the reeling speed in response to changes in the load on the reel, ensuring reeling is always carried out at a set, constant speed to prevent fish from escaping. |
| Electric Slow Winding | A function that enables ‘slow reeling’, a technique considered effective for a variety of target fish. This sets the low-speed range to ‘slow’ within the electric winding speed adjustment settings. |
| Display Calibration Function | A function that allows you to easily correct the counter display whilst fishing if it becomes misaligned with the line colour. |
| Top-to-Bottom/Bottom-to-Top Counter | As water depth can be measured from both the surface and the bottom, you can find the correct depth accurately in any situation and for any target fish. |
| Quick Retrieve / Stop Switch | A ‘Quick Retrieve’ function that allows you to perform reeling at a preset speed simply by pressing the switch when finding the depth or taking up Slack Lines. This is used in conjunction with the ‘Quick Stop’ switch. |
| Timer & Timer Winding | A timer with a display function that allows you to accurately track the time your Rig has been in the water. You can set the time from when the Rig is cast until it is retrieved, and it is automatically retrieved by the motor. The timer winding function enables precise and efficient retrieval. |
| Actual Winding Speed Display | A function that displays the actual winding speed per minute. This serves as a useful guide to the speed during winding. |
| Selectable Gunwale Stop | A function that automatically stops the electric reeling once the line has been reeled in to the set length. Setting this to a length convenient for retrieval doubles your efficiency and helps prevent line entanglement, a major cause of Rod damage. |
| Slow Stop at the Gunwale | A function that ensures the electric winding stops gradually when reaching the gunwale, thereby preventing fish from being lost due to the impact of a sudden stop. |
| Washable | Can be washed with water using a neutral detergent (however, do not submerge the product or use hot water). |
| Alarm ON/OFF | The alarm and switch sounds can be switched on or off. |
| Memory backup function | A backup function that retains the settings selected in each mode for your next fishing trip. |
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■ A mark of quality: the DAIWA Electric Reel Warranty System
Daiwa’s electric reel series comes with a peace-of-mind warranty system that provides a free warranty for one year from the date of purchase, or until whichever comes first: 200 hours of use or a total winding distance of 100 km. This warranty excludes certain repairs (such as the replacement or replenishment of drag washers or grease, or damage or faults caused by drops or impacts). Please check with your retailer at the time of purchase for further details.
Daiwa’s electric reel series comes with a peace-of-mind warranty system that provides a free warranty for one year from the date of purchase, or until whichever comes first: 200 hours of use or a total winding distance of 100 km. This warranty excludes certain repairs (such as the replacement or replenishment of drag washers or grease, or damage or faults caused by drops or impacts). Please check with your retailer at the time of purchase for further details.
Accessories
Reel Bag
Line threader pin
Stand cover
Fall brake dial seals ×2 (1 spare)
Super Power Cord (Black)
Pocket Guide
Line threader pin
Stand cover
Fall brake dial seals ×2 (1 spare)
Super Power Cord (Black)
Pocket Guide
VIDEO
Product Specifications
| DESCRIPTION | Standard weight (g) | Line per handle turn (cm) | Gear ratio | Standard reel capacity: Nylon (No. – m) | Standard reel capacity (PE, No.-m) | Bearings (BB/RB) | Maximum Drag Force (kg) | Maximum winding power (kg) | Normal winding speed with a 1 kg load (m/min) | JAFS Standard Winding Power (kg) | JAFS Standard Winding Speed (m/min) | Handle Knob Replacement Sizes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SEABORG G300J | 575 | 83 | 6.0 | 5–280_6–200 | 3-400_4-300_5-230 | 18/1 | 16 | 59(65) | 146 (162) | 14 | 190 | L |
| SEABORG G300JL | 575 | 83 | 6.0 | 5–280_6–200 | 3-400_4-300_5-230 | 18/1 | 16 | 59(65) | 146 (162) | 14 | 190 | L |
- The manufacturer's suggested retail price is listed excluding tax.
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*The reel capacity is a guide only and may vary depending on the manufacturer, items and line tension.
*The retrieve length is the amount of line wound in with each handle rotation.
*The maximum winding power is a reference value based on a supply voltage of 13 V and shaft torque. *kg = kgf·cm (for the Mega Twin mechanism, this refers to the power range)
*The standard winding speed is the average speed at which 100 m is wound with a 1 kg load at a supply voltage of 13 V.
*The JAFS standard winding power (power range for the Mega Twin mechanism) and speed are approximate values based on the regulations of the Japan Fishing Tackle Manufacturers Association, assuming a supply voltage of 13V.
*The JAFS standard winding speed refers to the value measured at a supply voltage of 13V in accordance with the Japan Fishing Tackle Manufacturers Association standards. It is the winding speed under no-load conditions at the outer diameter of the Spool.
*The figures in brackets are approximate values based on the use of Super Lithium.
*Regarding the power supply*
This electric reel is compatible with 12V to 16.8V direct current (DC). It cannot be used with power sources outside the specified range, such as 100V alternating current (AC) from a domestic mains supply or 24V DC from boat equipment. Furthermore, due to generators and wiring, the voltage of a boat power supply can easily become unstable, which may cause the reel’s protection circuit to activate, resulting in the reel stopping or rotating intermittently. To ensure the reel performs to its full potential, please use a genuine Daiwa battery designed for electric reels (please check ‘View Details’ for compatible batteries).
This electric reel is compatible with 12V to 16.8V direct current (DC). It cannot be used with power sources outside the specified range, such as 100V alternating current (AC) from a domestic mains supply or 24V DC from boat equipment. Furthermore, due to generators and wiring, the voltage of a boat power supply can easily become unstable, which may cause the reel’s protection circuit to activate, resulting in the reel stopping or rotating intermittently. To ensure the reel performs to its full potential, please use a genuine Daiwa battery designed for electric reels (please check ‘View Details’ for compatible batteries).