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Owner’s Manual
ECV-4501
In the carburetor, fuel is mixed with air. When the engine is test run at the factory, the carburetor is basically
adjusted. A further adjustment may be required, according to climate and altitude. The carburetor has one
adjustment possibility:
T = Idle speed adjustment screw.
Idle speed adjustment (T)
Check that the air filter is clean. When the idle speed is correct, the cutting attachment will not rotate. If
adjustment is required, close (clockwise) the T-screw, with the engine running, until the cutting attachment
starts to rotate. Open (counter-clockwise) the screw until the cutting attachment stops. You have reached the
correct idle speed when the engine runs smoothly in all positions well below the rpm when the cutting
attachment starts to rotate.
If the cutting attachment still rotates after idle speed adjustment, contact your service workshop.
NOTE!
The L and H screws should only be adjusted by an Authorized Tanaka Dealer.
The standard openings (returns) of L/H screws from lightly seated positions are as follows:
WARNING!
When the engine is idling the cutting attachment must under no circumstances rotate.
5. Maintenance
MAINTENANCE, REPLACEMENT, OR REPAIR OF THE EMISSION CONTROL DEVICES AND SYSTEMS
MAY BE PERFORMED BY ANY NONROAD ENGINE REPAIR ESTABLISHMENT OR INDIVIDUAL.
NOTE FOR THE US MARKET!! (Fig. 3-1B)
We would like to inform that the machines, which carry
the following label on the unit are different from ones for
other market in carburetor adjustment. Adjustment of
Standard openings of L/H screws are not necessary.
They are preset and fixed. Do not turn L/H screw fully
but 90 degrees at most.
Carburetor adjustment (Fig. 3-1)
WARNING!
Never start the engine without the complete clutch cover.
Otherwise the clutch can come loose and cause personal
injuries.