TM 9-2815-225-34&P 3-63.  FUEL PUMP TESTING AND CALIBRATION (Contd) LOCATION/ITEM ACTION REMARKS h.  Throttle Leakage (Contd) 70. No. 1 burette (6) When count cycle ends and count The scale on the burette is "ON" light (16) goes out, release measured in cubic centimeters lever.  Read amount of fuel delivered. (cc).  Normal throttle leakage for this pump is 45 to 59 cc at 1000 rpm.  Repeat steps 67 through 70 at least three times to ensure accuracy.  (For Big Cam I engine fuel pumps, 12.5 to 16.5 cc throttle linkage is normal).  If throttle leakage is not within limits shown above, do step 71.  If throttle leakage is within limits shown above, go to step 72. 71. Rear throttle stopscrew (99) Loosen locknut (100) and adjust Turning stopscrew (99) in will and locknut (100) rear throttle stopscrew (99) to increase fuel flow, and turning adjust fuel delivery. stopscrew (99) out will decrease fuel flow.  Even a slight movement of stopscrew (99) will make several cubic centimeters difference in fuel flow.  Sometimes just loosening and retightening the locknut (100) will be enough. 3-496