It's an
electric motor that drives a worm
gear via a belt (the belt is a standard component: 124L, half inch wide). The manual back-up works directly on the final axle (the one on which the chain gipsy and
rope drum are mounted). It is a very simple construction and easy to service/repair yourself. Ours is 34 years old (original
equipment on our Hallberg-Rassy 41) - we just rewired it, changed the belt and did a strip/clean/paint/reassemble job. The gears seem to be good quality; look like new. The housing is made of alloy; if threads have corroded too much, there is enough space to drill/tap new threads. Our only problem was the alloy
rope drum that is frozen on the axle.
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