Why Is My 9A MOSFET With 3V Supply Only Delivering 0.97A Instead of 2.13A?

Hello everyone i am using a Mosfet for switching purpose..I have to use 3 volts power supply between drain and load as per requirement of my design.The current i required is 2.13 amps but with the 3 volts power supply it is  supplying only 0.97 A.i am triggering the gate from a 555 timer as i need a dealy before swithing.The rating of mosfet is 9amps but is not giving the required current using 3 volts supply,Any Help?

Hi Ali-I need more information so I can answer your question better. You say there is 3 volt supply between drain and load.  Is this the same supply driving the 555?
What is the part number of the MOSFET? Many MOSFETS have a threshold voltage that is greater than 3 volts.  In order to insure that the MOSFET is saturated you'll need to make sure that the voltage out of the 555 is greater than the threshold voltage by 50% or more.
Is the 555 a bipolar or a CMOS version?  They come both ways.  The bipolar version will have a lower output voltage than the CMOS version.Post additional info and I'll try to zero in on the problem.
-Rick