OVERVIEW Section I. Section Il. Section Ill. Section  IV. OVERVIEW ARMY   TM   9-280S262-14 AIR FORCE TO 38G2-90-1 NAVY   NAVFAC   P-8-613-14E CHAPTER  2 OPERATING  INSTRUCTIONS Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Description and Use of Operator’s Controls and indicators.. . . . . . . . . . . . . ...2-1 Preventive Maintenance Checks and Services(PMCS) . . . . . . . . . . . . . . . . . ...2-4 Operation Under Usual Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-7 Operation Under Unusual Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-11 This  chapter  contains  instructions  and  procedures  required  to  operate  the  engine  safely  andefficiently. Section  I.  DESCRIPTION  AND  USE  OF  OPERATORS’  CONTROLS  AND  INDICATORS Paragraph Page 2-1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-1 2-2 Operator’s Controls and indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2-1 2-1. General. This section contains a list of operator controls and indicatorsandadescription of their use. 2-2. Operator’s Control and lndicators.  The following is a list of operator controls and indicators for all models of the 6HP Military Standard engine.Although the appearance ofthe engine may vary between models the location and function of the controls and indicators are similar (figure 2-1). Key 1 2 3 4 5 Control  or  Indicator Choke Air  Cleaner  Service  Indicator Throttle Control Models 4A032-1 (serial nos. G001001 through G004004), -2, -3, -4 Oil Filler Tube and Gage Ignition Switch Models 4A032-1 (serial nos. G001001 through G004004), -2, -3, -4 Function Used during engine start-up to reduce airflow through  carburetor,  making  starting  easier. indicates  to  operator  when  air  cleaner  requires servicing. Allows  operator  to  regulate  speed  of  engine between  idle  speed  and  full  governed  speed. Allows operator to check oil level in engine, and provides means for adding oil as needed. Used  to  stop  engine/allows  engine  to  be  started. 2-1