Reply To: Howard 350 Rotor Drive

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As I said, it was a while ago ! Anyway I’ve had a look at a parts list and you are correct, no face dogs but a sliding gear. Similar situation applies. If, over time, operators have been a bit impatient and attempted to engage the rotors before the drive train was stationary the mating surfaces of the gears will become worn and will tend to be forced apart under load.
I will scan the relevant pages of the manual and post them later – they may be of assistance.