Stihl HT 103 Product Instruction Manual - Page 35
Checking the Spark Plug, WARNING, Installing the Spark Plug
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Checking the Spark Plug English N Press the boot (2) firmly onto the spark plug. N Fit the cover (1) and screw it down firmly. 1 000BA039 KN 0000-GXX-1831-A0 A N Clean dirty spark plug. N Check electrode gap (A) and readjust if necessary - see chapter "Specifications." N Use only resistor type spark plugs of the approved range. Rectify problems which have caused fouling of spark plug: - too much oil in fuel mix, - dirty air filter, - unfavorable running conditions, e.g. operating at part load. 3 2 WARNING To reduce the risk of fire and burn injury, use only spark plugs authorized by STIHL. Always press the spark plug boot (1) snugly onto the spark plug terminal (2). Do not use a spark plug with a detachable SAE adapter terminal (3). Arcing may occur that could ignite combustible fumes and cause a fire. This can result in serious injuries or damage to property. N Only use resistor type spark plugs with solid, non-threaded terminals Installing the Spark Plug N Screw the spark plug (3) into the cylinder. N Tighten down the spark plug (3) with the combination wrench. HT 102, HT 103, HT 132, HT 133 33