MAINTENANCE
Adjusting the idle speed, T |
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Adjust the idling speed with |
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the screw T, if it is necessary |
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to readjust. First turn the idle |
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speed adjusting screw T | T | |
clockwise until the blades | ||
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start moving. Then turn the |
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screw |
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blades stop. The idle speed is |
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correctly adjusted when the |
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engine runs smoothly in |
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every position. There should |
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be a good margin to the |
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speed when the cutters start |
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to move. The cutters should |
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not move when the choke |
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control is in the start throttle |
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position. |
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WARNING! Contact your dealer/service workshop if the idle speed setting cannot be adjusted so that the blades stop. Do not use the machine until it has been properly adjusted or repaired.
High speed needle H |
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The high speed needle affects | H | |
the machine’s power, speed, | ||
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temperature and fuel |
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consumption. A too lean |
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adjustment on the high speed |
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needle H (the high speed |
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needle H is screwed in too |
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much) gives a too high speed |
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resulting in engine damage. |
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Do not allow the engine to |
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run at full speed for more |
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than 10 seconds. |
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Apply full throttle and turn |
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the high speed needle H |
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slowly anticlockwise until the |
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engine runs unevenly. The |
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high speed needle H is then |
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turned slowly clockwise a |
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little until the engine runs |
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smoothly. |
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Note the engine should be |
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run unloaded when adjusting | H | |
the high speed needle. | ||
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The high speed needle is |
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adjusted correctly when the |
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machine ”splatters” a little . If the machine smokes heavily at the same time as it ”splatters” heavily the adjustment is too rich.
NOTE! For optimum setting of the carburetor, contact a qualified servicing dealer who has a revolution counter at his disposal.
Correctly adjusted carburetor
When the carburettor is correctly adjusted the machine will accelerate without hesitation and the engine will splutter a little at maximum speed. In addition, the cutters must not move when idling or when the choke control is in the start position. If the low speed needle is set for too lean a mixture it can cause starting problems and poor acceleration.
A too lean adjusted high speed needle H gives lower power = less capacity, bad acceleration and/or damage to the engine. A too rich adjustment of the two speed needles L and H gives acceleration problems or too low working speed.
English – 15
