Sticking starter motor

[TiddlesRX7]

My starter motor keeps sticking on my FC3S. Normally if its been raining or first thing in the morning when its damp outside. If I give it a rock in gear it fires right up. Is there anything I can do to stop it from sticking or is it a case of replacing it.

[David Nock (RIP)]

Some of us tried to answer this sort of problem a week or two ago but the chap kept reporting different symptoms till we all got confused. Search under \'commutator\'. there\'s only one post there, titled \'starter motor jammed\'