I would think you could run a signal motor, if the remaining motor has the tach tied to the controller. Or maybe running it without odyssey speed control. Just a thought.
Is there any markings (part number) on the motor itself that you could cross reference?
I see they have a similar motor, but the worm gear looks a bit different. I am not sure the pitch and diameter of the worm are any different.
6208201102 | DC MOTOR / W/FLYWHL & SNSR / LM SD-80 / SD-90 |
I would hope that this same original motor was used in other engines. You may be able to buy a motor and then strip off the component(s) from one and place on the other.
Or you might be able to find a used DC motor on one of the auction sites.