This old tech, so visually check the circuit board connections for continuity or discoloring. The piston and piston coil should still work, however the circuit board may be damaged.
The question is now did the drum mount failure cause the spring to scrape against the casing or did the spring jamb against the casing and cause the drum mount to fail? Longer wire cable and shorter spring? New spring for cable tension Epoxy for drum mount rebuils Epoxy at drum mount, to be shaped after 24 hr set.
Upon further examination of the interior of the autohelm casing there is evidence of the spring rubbing against the casing near the compass drum, depositing scrapings from the casing on the spring.
