Meet the Garmin Reactor 40 Autopilot: a hydraulic corepack built for serious boating. Paired with SmartPump v2 and the GHC50 autopilot instrument, this system delivers effortless steering for both sail and powerboats, so you can enjoy the water with less hands-on steering and more freedom to explore.
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Compact SmartPump v2 fits most sailboats and powerboats with hydraulically steered systems, delivering reliable, efficient performance in a compact package.
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Solid-state 9-axis AHRS lets you mount Reactor 40 virtually anywhere, in any orientation—even when the boat is pitching or rolling.
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Fast, simple calibration means you’re on the water and on course quicker than you think.
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Control from anywhere onboard when connected to a compatible Garmin chartplotter or GHC autopilot instrument. Use the Reactor autopilot remote, select quatix® marine smartwatches, and more for convenient helm control.
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Optional Shadow Drive automatically disengages autopilot when you turn the wheel, giving you seamless, intuitive maneuvering.
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Advanced efficiency lower power consumption and improved thermal performance, with higher reliability for longer cruises.
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Auto-navigation features include heading hold, step turns, wind hold, and tack/jibe when paired with a wind sensor, plus follow-route and Auto Guidance+ for planning on compatible Garmin devices.
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Ready for quick integration requires a compatible Garmin chartplotter or GHC50 instrument to unlock full autopilot control and data sharing with other Garmin MFDs and devices.
Designed for rugged marine use, the Reactor 40 corepack delivers consistent performance under real-world conditions. When paired with the GHC50 autopilot instrument, you gain a dedicated, touchscreen display at the helm and seamless data sharing with your Garmin ecosystem, making navigation and course keeping simpler and more reliable than ever.
Key specifications
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Dimensions (H x W x D): 7 3/4" x 7 1/2" x 9 5/8" (197 mm x 190 mm x 244 mm)
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Weight: 16.5 lbs (7.5 kg)
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Temperature range: 5°F to 131°F (-15°C to 55°C)
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Materials: ECU—aluminum alloy (gasketed); bracket—carbon steel; manifold—aluminum
| General |
| Dimensions (H x W x D) |
7 3/4" x 7 1/2" x 9 5/8" (197 mm x 190 mm x 244 mm) |
| Weight |
16.5 lbs (7.5 kg) |
| Temperature range |
From 5°F to 131°F (from -15°C to 55°C) |
| Material |
Electronics Control Unit (ECU) - fully gasketed, aluminum alloy; bracket - carbon steel; manifold - aluminum alloy; motor - aluminum alloy |
| Power cable length |
9 ft (2.7 m) |
| Power input |
11.5-30 Vdc |
| Fuse |
40 A, blade-type |
| Main power usage |
standby - less than 1 A; engaged - 5-10 A; peak - 34 A |
| Flow rate |
Configurable from 0 to 2.4 L per minute |
| Compatible with steering cylinder sizes |
from 4-24 cu in; 7 second lock to lock up to 17 cu in |
| CCU Specifications |
| Dimensions |
3 19/32" diameter (91.4 mm) |
| Weight |
5.6 oz (159 g) |
| Temperature range |
From 5°F to 131°F (from -15°C to 55°C) |
| Case material |
Fully gasketed, high-impact plastic, waterproof to IEC 529 IPX7 standards |
| CCU cable length |
9.5 ft (3 m) |
| NMEA 2000 power input |
9-16 V |
| NMEA 2000 LEN |
3 (150 mA) |
| Buzzer/Alarm Specifications |
| Dimensions (L Diameter) |
29/32" 1.0" (23 mm 25 mm) |
| Weight |
2.4 oz (68 g) |
| Temperature range |
from 5°F to 131°F (from -15°C to 55°C) |
| Cable length |
10 ft (3.0 m) |
