Replacement 12 v Motor for Raymarine Tiller Drive

Greetings,

I am looking for an appropriate 12 volt replacement motor for a Raymarine autopilot tiller drive (Raymarine ST4000). The system uses a 10 amp fuse and nearly all the power is consumed by the drive motor. The Robot Shop motor product code RB-Wtc-06 found at the following link appears to have the correct dimensions and specs except the shaft length at the back (electrical connection side) is too long:

robotshop.com/en/rs-555-12v- … motor.html

Does the Robot Shop have the same motor with a rear shaft length of only around 2 to 3 mm? I can post a photo of the existing motor if that is helpful, but it has no identifying markings or labels.

Thank you,

Pacific Cruiser

Ho Pacific Cruiser,

We have these two versions here:
RS-555 Motor 7750rpm 12V 29.16oz-in
Banebots RS-555 12V 7750 RPM Brushed DC Motor

Best regards,