[CA] [CA11] Autopilot loosing calibration settings

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum SetFree,

The reported issue may be indicative of a problem with the S3G's gyro or with the circuitry of the S3G. This may be verified by unplugging the gyro's cable from the S3G's circuit board. Please click here to view a FAQ addressing this subject. Re-calibrate and align the S3G's compass, tie the boat to a dock, note the heading, shut the system down for approximately 10 minutes, unplug the gyro's cable from the S3G's circuit board, and then power up the autopilot. If the heading changed, then the problem is rooted in the circuit board, necessitating that the course computer be replaced as Raymarine can no longer service the S1/S1G/S2/S2G/S3/S3G autopilots. If the heading did not change, then the problem is rooted in the gyro, necessitating that it remain unplugged. In the case of the latter, the autopilot will function as a S3 rather than a S3G autopilot. Replacement gyros for S1G/S2G/S3G autopilots are no longer available.

If seeking a currently manufactured autopilot to replace a S3G, then a T70161 Evolution EV-400 Sail or T70162 Evolution EV400 Power would be recommended. The currently installed rudder referenced transducer and drive unit may be retained for use with the Evolution autopilots specified.