MAINTENANCE (Continued) MAINTENANCE (Continued)(_) AIR CLEANER (see Figure4):NEVER RUN ENGINE WITHOUT COMPLETE AIR CLEANERINSTALLED ON ENGINE.Replace filter once a year or more often if used in extremely dustyor dirty conditions.DO NOT ATTEMPT TO CLEAN OR OIL FILTER.Replacement filters are available at any Sears Roebuck and Co.(or Sears Canada, Inc.) Service Center. To install new filter,proceed as follows:A. Turn cover to the left (counterclockwise) and remove it andfilter from flange. Discard filter.B. Clean cover and flange thoroughly.C. Insert new filter into cover.D. Position cover and filter against flange with tab on coverinserted into lower left corner of slot in flange.E. Push cover firmly against flange and turn it to the right(clockwise) as far as it will go. Be sure retainers are lockedaround flange.FLANGERETAINERSLOT .3OVERTURN COVERTO THE LEFT(COUNTER-CLOCKWISE)TO REMOVETABTO THE RIGHT(CLOCK'3NISE)TO TIG HTEN(_) SPARK PLUG (see Figure5):This spark ignition system meets all requirements of the Car_adianInterference-Causing Equipment Regulations. This enginecomplies with all current Australian and New Zealand limitationsregarding electromagnetic interference.Check spark plug yearly or every 100 operating hours.A. Clean area around spark plug.B. Remove and inspect spark plug.C. Replace spark plug if electrodes are pitted, burned or porcelainis cracked. For replacement use Champion RJ-19LM orequivalent.NOTE: A resistor spark plug must be used for replacement.D. Check electrodes gap with wire feeler gauge and set gap at.030 if necessary.E. Install spark plug, tighten securely.ELECTRODES.030 GAPFigure 5(_) COOLING SYSTEM (see Figure 1):IMPORTANT: Frequently remove any grass clippings, dirt anddebris from cooling fins, air intake screen and levers and linkage(see Figure 1). This will help ensure adequate cooling and correctengine speed.(_) CHECK ENGINE AND EQUIPMENTOFTEN FOR LOOSE NUTS, IBOLTS AND ATTACHMENTS, AND KEEP THESE ITEMSTIGHTENED.Figure 4Page 3 181-1229-11