Which screw increases the fuel???

[johnjeep]

Hello,
Can someone tell me which screw I have to screw in to increase the power (ammount of fuel).
I thought it was the small 10mm hew nut which I marked "REGULATOR" on the picture but it only adjusted the max rpm I could reach. Went to the dealer and he said I was the one on top. Yesterday I read on another forum it should be the on which is locked by the upper 22mm hex nut.
Who can shed some light on this ????

pic

 

[Renze]

if im right, its the middle. long time ago i fiddled with these newer pumps.

 

[johnjeep]

So unscrewing the 22 het nut and screwing the notched nut a littel further in should do it. We screwed in the top adjusting nut. It picks up a littel better now in the low revs.