We have an old tug for canal restoration with a Lister HA3 none hydraulic reversing gearbox
It has a Blackstone reversing gearbox.
The first problem was it would not drive in reverse. We adjusted the brake band and that was fixed.
Now the gearbox is always driving forward. The clutch is disengaged ie there is a clear gap between the 2 clutch arms and the actuator ring. Even in neutral the prop is in forward.
This means , for some reason the clutch is not disengaging.
I read that this gearbox shares oil with the engine and there is no dipstick in the reversing gearbox.
Ideas of a cause and details on how to get the cluch assembly woul dbe very greatfull received.]
Thanks
Nick