Garmin Reactor 40 Mechanical Corepack, GHC 50
For boats with a mechanical or solenoid steering drive that add Garmin control.
Amazon $2,249.99$2,249.99
The Garmin Reactor 40 Mechanical Corepack, GHC 50 is the better marine autopilot overall, rated 3.2 to 3.0. The Garmin Reactor 40 Mechanical Corepack, GHC 50 leads on value. The Raymarine EV-300 Solenoid Pilot Pack wins on warranty. The Garmin Reactor 40 Mechanical Corepack, GHC 50 costs $550 less ($2,249.99 vs $2,799.99).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Raymarine EV-300 Solenoid Pilot Pack
For boats with solenoid-controlled power steering and no autopilot drive of their own.
Amazon $2,799.99$2,799.99
Which should you buy?
- Choose the Garmin Reactor 40 Mechanical Corepack, GHC 50 for value ($2,249.99 for the pack vs $2,799.99 for the pack).
- Choose the Raymarine EV-300 Solenoid Pilot Pack for warranty (2-year warranty vs 1-year warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every mechanical, cable and solenoid marine autopilot; a clear win is highlighted. How we rank explains each one.
| Factor weight | Garmin Reactor 40 Mechanical Corepack, GHC 50 | Raymarine EV-300 Solenoid Pilot Pack |
|---|---|---|
| Overall rating | 3.2/5 | 3.0/5 |
| Value 30% | 32 $2,249.99 for the pack | 22 $2,799.99 for the pack |
| Capability range 30% | 50 boat size and cylinder range not published (neutral score used) | 50 boat size and cylinder range not published (neutral score used) |
| Features 25% | 75 control head in the box, heading sensor included, NMEA 2000 / SeaTalk ng | 75 control head in the box, heading sensor included, NMEA 2000 / SeaTalk ng |
| Power draw 10% | 50 standby draw not published (neutral score used) | 11 300 mA standby |
| Warranty 5% | 0 1-year warranty | 25 2-year warranty |
Specifications
| Garmin Reactor 40 Mechanical Corepack, GHC 50 | Raymarine EV-300 Solenoid Pilot Pack | |
|---|---|---|
| Capability | ||
| Steering type | Mechanical | Solenoid |
| Pack type | Core pack | Core pack |
| In the pack | ||
| Contents | Reactor 40 course computer, GHC 50 autopilot instrument (mechanical, retrofit or solenoid drive sold separately) | p70Rs control head, EV-1 sensor core, ACU-300, Evolution cable kit |
| Control head | GHC 50 touchscreen | p70Rs |
| Control head included | Yes | Yes |
| Drive or pump included | No | No |
| Heading sensor | Solid-state 9-axis AHRS | EV-1 9-axis sensor core |
| Electrical | ||
| Supply voltage | 12 V | 12/24 V |
| Standby draw | - | 300 mA |
| NMEA 2000 / SeaTalk ng | Yes | Yes |
| Support | ||
| Warranty | 1 year | 2 years |
| Released | 2022-06 | - |