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Owner’s Manual
THB-2500/THB-2510/TBL-4600/4610
,
TBL-505
Carburetor adjustment (Fig. 3-1, 1 B, IC)
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.
MAINTENANCE, REPLACEMENT, OR REPAIR OF THE EMISSION CONTROL DEVICES AND SYSTEM MAY BE
PERFORMED BY ANY NONROAD ENGINE REPAIR ESTABLISHMENT OR INDIVIDUAL.
RECOMMENDATION:
CARBURETOR ADJUSTMENT NEEDS THE SKILL OF EXPERIENCED OR WELL TRAINED PEOPLE. IT IS RECOMMENDED TO
TAKE THE UNIT TO YOUR NEAREST DEALER.
CAUTION!
The above adjusting procedure must be followed when adjustment is MADE or DAMAGE to engine will occur because of
the incorrect condition.
Idle speed adjustment (T)
To adjust, turn IDLE Adjustment Screw (T) in (clockwise) to increase engine speed, out (counterclockwise) to
decrease engine speed.
Standard Idle rpm is 2500-3000rpm.
5. Maintenance