Makita EN4950H Instruction Manual

Also see for EN4950H: Original instruction manual Original instruction manual Instruction manual Original instruction manual Technical manual

Contents

21CHECKING THE SPARK PLUG- Only use the supplied universal wrench to remove or to install the spark plug.- The gap between the two electrodes of the spark plug should be 0.7 - 0.8 mm(0.028” - 0.032”). If the gap is too wide or too narrow, adjust it. If the spark plug isclogged or contaminated, clean it thoroughly or replace it.CAUTION: Never touch the spark plug connector while the engine is running(danger of high voltage electric shock).Cleaning the fuel filter (suction head in the fuel tank)WARNING: INFLAMMABLES STRICTLY PROHIBITEDCheck and clean the fuel filter monthly or every 50 operating hours.Check the fuel filter periodically. To check the fuel filter, follow the steps below.(1) Remove the fuel tank cap, drain the fuel to empty the tank. Check the tankinside for any foreign materials. If any, remove them.(2) Pull out the suction head by using a wire hook through the tank opening.(3) If the fuel filter clogged slightly, clean it. To clean it, gently shake and tap it infuel. To avoid damage, do not squeeze or rub it. The fuel used for the cleaningmust be disposed in accordance with the method specified by regulations inyour country.If the fuel filter became hard or heavily clogged up, replace it.(4) After checking, cleaning or replacing, push the fuel filter in all the way to thebottom of the fuel tank.Clogged or damaged fuel filter can cause insufficient fuel supply and reduce enginepower. Replace the fuel filter at least quarterly to ensure satisfactory fuel supply tothe carburetor.0.7 mm - 0.8 mm(0.028” - 0.032”)Fuel pipeHose clampFuel filterReplacing the fuel pipeCAUTION: Inflammables strictly prohibitedCheck and clean the fuel pipe daily or every 10 operating hours.Replace the fuel pipe every 200 operating hours or every year regardless ofoperating frequency. Otherwise fuel leakage may lead to fire.If you find any leakage during inspection, replace the fuel pipe immediately.INSPECTION OF BOLTS, NUTS AND SCREWS- Retighten loose bolts, nuts, etc.- Check for fuel and oil leakage.- Replace damaged parts with new ones for safety operation.CLEANING OF PARTS- Keep engine clean by wiping down with a cloth rag.- Keep the cylinder fins free of dust or dirt. Dust or dirt adhering to the fins willcause piston seizure.REPLACEMENT OF GASKETS AND PACKINGSReplace gaskets and packings if the engine is disassembled.For any maintenance or adjustment not described in this manual, ask your localMAKITA authorized service center.Fuel pipe