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ARMY TM 9-2805-257-14 AIR  FORCE  TO  38G2-103-2 NAVY NAVFAC P-8-612-14E 4-34. Carburetor. This task covers: a.  Adjustment c.  Inspection b.  Removal d.  Installation INITIAL  SETUP Tools Materials/Parts   (cont) General Mechanic’s Tool Kit (Item 1, Appendix B) Gasket,  Carburetor  Mounting  (NSN  5330-00-819-8733) Wrench,  Torque  (NSN  5120-00-640-6364) Gasket,  Throttle  Housing  Front  (P/N  9786E64-6) (Item 2, Appendix B) Gasket,  Throttle  Housing  Rear  (P/N  9786E65-3) Gasket, Throttle Housing to Carburetor Materials/Parts (P/N  9786E65-4) Rags, Wiping (Item 6, Appendix D) Solvent,  Drycleaning  (Item  7,  Appendix  D) a. Adjustment. (figure 4-27) (1) (2) (3) (4) (5) (6) (7) (8) (9) 4-60 Turn  main  adjustment  needle  (1)  and  idle  adjustment  needle  (2)  fully  clockwise  to  stop. Turn  main  adjustment  needle  (1)  3/4  turns  counterclockwise. Turn  idle  adjustment  (2)  1/2  turns  counterclockwise. Start  and  warm-up  engine  (para.  2-9). Apply end item load and observe exhaust. If exhaust is black, turn main adjustment needle (1) clockwise. If  engine  runs  rough  or  lacks  power,  turn  main  adjustment  needle  (1)  counterclockwise. To  set  idle  speed,  turn  idle  speed  regulating  screw  (3)  clockwise  to  increase  idle  or  counterclockwise  to decrease. Stop  engine  (para.  2-10).


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