Oiler stops at half a tank

[Greenhighlander]

As the title says my 445 stops putting out B&C oil slightly past half a tank. This just started recently . It isn't a huge deal as the B&C oil has always been roughly 2:1 to fuel in it.  I checked the hose in the tank to see if it had moved at all and it was fine and where it should be.  
Just wondering what might be causing this ?  

[sawguy21]

Remove the line and check for a crack.