Operating Instructions37HourmeterThe hourmeter, which is located on the left front ofthe body, displays operating time accumulatedwhile the ignition switch is in the ON position.The hourmeter provides maintenance remindersafter certain hours of operation. The hourmeterscreen will start flashing the reminder one hour priorto the recommended interval and will continue untilone hour after the recommended interval (twohours). The hourmeter does not have a manualreset function.* These intervals reflect the actual time that thereminder will flash (one hour prior to and onehour after the recommended interval).** This reminder is only used one time.*** In normal operating conditions, oil changes in100-hour intervals are acceptable. Walker andthe engine manufacturers recommend engineoil changes every 50 hours in extremely dirtyor dusty conditions or for units with less than100 hours annual use.NOTE: The blinking hour glass on the displaymeans that the meter is operating properly.HourmeterVoltmeterThe voltmeter displays battery and charging systemvoltage. An indication of low or high voltage (the redarea) indicates an electrical system failure. Thecause of the failure should be determined and cor-rected.Oil Pressure Warning LightThe oil pressure warning light indicates that engineoil pressure is below the safe operating level [below3 to 5 PSI (21 to 34 kPa)]. This light (and warninghorn) will come on when the ignition is turned ON, butshould go off after the engine is started. If the lightfails to come on when the ignition switch is turned ON,it could indicate a burned out bulb. If the light comeson during engine operation, stop the engine imme-diately and correct the source of the problem beforefurther engine operation.IMPORTANT: Continued operation of the enginewith an illuminated oil pressure warning light MAYcause severe engine damage (if a low oil pressurecondition exists).Over Temperature Warning Light(Model MT and MTEFI Only)The over temperature warning light indicates thatengine oil temperature and/or cylinder head temper-ature are above the safe operating limit and the en-gine is overheating [above 305° F (152° C) oil or450° F (232° C) cylinder head]. If this light comeson, there may be a problem with:• Engine cooling system (material packed into cyl-inder head cooling fins, clogged air intake screen)• Low oil level in crankcaseStop the engine and correct the source of the prob-lem before further operation.IMPORTANT: Continued operation of the enginewith an illuminated over temperature warning lightMAY cause severe engine damage (if a high oil tem-perature or head temperature condition exists).Procedure Interval* ReminderOil Change(Break-In)** 4-6 Hours CHGOILLubricateand CheckLevels24-26 Hours LUBEOil Change 49-51 Hours*** CHGOIL