Mahmood. Exactly correct. Spin it up to light off with the throttle slightly open and the manual fuel valve OFF. now open the fuel valve slowly until the unit just sustains now test the throttle control. if it is working it will cause the fire to diminnish and the speed to drop. if it does open the manual fuel valve slightly and test for increased speed range. If it starts to run away shut down the manual fuel and fix the problem then start again. every time you change the fuel control run it up safely. This is especialy true as this turbine has no load except its internal friction and its compressor section so speed changes will be much faster than with a load attached. Terry