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Owner’s Manual
PF-4000, PF-4010, PF-4210
Maintenance
MAINTENANCE, REPLACEMENT, OR REPAIR OF THE EMISSION CONTROL DEVICES AND SYSTEMS MAY BE
PERFORMED BY ANY NONROAD ENGINE REPAIR ESTABLISHMENT OR INDIVIDUAL.
Carburetor adjustment (Fig. 3-1)
WARNING!
Never start the engine without the equipment attached! Otherwise the clutch can come loose and cause personal
injuries.
In the carburetor, fuel is mixed with air. When the engine is test run at the factory, the carburetor is basically adjusted.
The carburetor has one adjustment possibility:
T = Idle speed adjustment screw.
Idle speed adjustment (T)
Check that the air filter is clean. If adjustment is required, close (clockwise) the T-screw, with the engine running.
You have reached the correct idle speed when the engine runs smoothly in all positions well below the rpm when the
equipment starts to rotate.
If the equipment still rotates after idle speed adjustment, contact your service workshop.
NOTE!
Standard Idle rpm is 2500-3000 rpm.
Air filter (Fig. 3-2)
The air filter must be cleaned from dust and dirt in order to avoid:
• Carburetor malfunctions.
• Starting problems.
• Engine power reduction.
• Unnecessary wear on the engine parts.
• Abnormal fuel consumption.
Clean the air filter daily or more often if working in exceptionally dusty areas.
Cleaning the air filter
Remove the air filter cover and the filter (1).
Rinse it in warm soap suds. Check that the filter is dry before reassembly. An air filter that has been used for some time
cannot be cleaned completely. Therefore, it must regularly be replaced with a new one. A damaged filter must always
be replaced.