Stihl 036 Instruction Manual - Page 42

It is usually necessary to change the setting of the idle speed adjusting screw after every correction to the low speed adjusting screw . • Turn the idle speed adjusting screw clockwise until chain begins to run then back off the screw one quarter of a turn • Turn the idle speed adjusting screw counterclockwise until chain stops running then turn screw another quarter turn in the same direction Idle setting is too lean • Turn the low speed adjusting screw counterclockwise no further than stop until engine runs and accelerates smoothly - 4 6 5 If engine is down on power, check the •spark arresting screen in the muffler: Allow muffler to cool down. Take out the four screws. •• Remove the muffler upper casing . Bend back the retaining tabs . •• Pull out the spark arresting screen •. Clean spark arresting screen if necessary. If screen is damaged or coked up, fit a new one. • Refit the spark arresting screen in the reverse sequence. 145BA044 KN 145BA043 KN A Wrong fuel mix (too much engine oil in the gasoline), a dirty air filter and unfavorable running conditions (mostly at part throttle etc.) affect the condition of the spark plug. These factors cause deposits to form on the insulator nose which may result in trouble in operation. If engine is down on power, difficult to start or runs poorly at idling speed, first check the spark plug. • Remove spark plug see chapter "Starting": Clean dirty spark plug. •• Check electrode gap it should be 0.5mm/0.02" - • readjust if necessary. Use only resistor type spark plugs of the approved range. Rectify problems which have caused fouling of spark plug: Incorrect carburetor setting, too much oil in fuel mix, dirty air filter, unfavorable running conditions, e.g. operating at part load. 000BA039 KN