Dad, the two springs can be seen in the pics posted by Chip.
The main spring numbered 18 fits over the shaft numbered 17.( first picture)
The part of the spring going upwards goes through a hole above the shaft in the upper crank case.(not shown) the other end snags round the tang to the right of the figure 17.
In picture number 2 you can see the other spring, it is attached to the side of the part numbered 16. The rod numbered 4 is pointing towards it in the pic.
Sam.
