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SERVICE B1000013 English 1 (1) SB, Basic setting, carburettor, 235, 236, 240, EPA, EU, 2010-05 Carburettor adjustment Conditions during adjustment · The air filter should be clean and the cylinder cover fitted when adjustments are made. Adjusting the carburettor with a dirty air filter will give a too lean fuel mixture the next time the air filter is cleaned. This can result in serious damage to the engine. · Mount, for this model, approved bar and chain combination (see Technical data in the Operator’s Manual).
235 236 240 14 ” or 16 ” 14 ” or 16 ” 14 ” or 16 ” that it · The chain should not be tensioned more than remains 0,2 inches to the bar. Replacement of the H-needle or complete carburettor 1. Carefully screw the new H-needle to the bottom and turn it anticlockwise “A ” turns. (see figure 42) 235 236 240 A=2 A=2 A=2 Fig. 42 2. Start the engine. If necessary, adjust the idling speed with the T-screw until the chain stops. 3. Let the engine run at 11 000 – 11 500 rpm 1 minute, until warm. 4. Adjust the H-needle to give a top speed of “B ” rpm. Use a tachometer. 235 236 240 B = 12 000 B = 12000 B = 12 000 Use screwdriver 530 03 55-60. Replacement of the L-needle 1. Screw the new L-needle to the bottom and then turn it counterclockwise “C ” turns. 235 236 240 C=2 C=2 C=2 (see figure 43) 2. Adjust the idle speed to “D ” rpm. 235 236 D = 3000 D = 3000 240 D = 3000 Fig. 43
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