The syringes should have a different cross section. Perhaps the most difficult aspect to assembling the appartus is to ensure there is no air left between the bulb and the liquid (remember that Pascal's law works with incompressible fluids and the air isn't one). You need to fill the syringes using suction and with the glass "T" submerged in water. Fill the small syring first and use the  large one to pump all the air out. 
The bulbs should be lubricated with sylicone.
You have to take the weight of the bulbs into account and add it to that of the weights placed on top. The mass of those in the photograph are 62.3 g and 9.8 g.
You should placed a weight of 50g on the large bulb and then add weights of 10g to the small bulb until it starts to move. At this moment the small force is multiplied by S₂ / S₁ is equal to the weight of the large bulb plus the 50g weight. 
You can do this practical experiment and fill out a table like the one we used.