Carburetor Adjustment; Stopping Engine - Zenoah G380PU Owner's Manual

4. When engine first fires, open the choke and turn the propeller again in the same manner.
5. When the engine is started,warm it up for 2 to 3 minutes at low speed.

Stopping Engine

Ground the black wire from the source coil to the engine, and the engine will stop.

4. Carburetor Adjustment

The carburetor comes with a standard setting.
This setting is for optimum performance under the barometric pressure and climactic
conditions at the factory.
Therefore, the carburetor should be readjusted wIth a load applied (with the propeller
mounted) after the engine having been warmed up.
[ NOTE ]
1. Adjustment standards :
LOW SPEED NEEDLE : 1 ±
HIGH SPEED NEEDLE : 1
2. IDLE SCREW - Turn clockwise to increase the idling rpm.
3. LOW SPEED NEEDLE - This needle controls fuel flow in the low rpm range.Turning
clockwise makes the fuel lean. Turning counterclockwise makes the fuel rich.
4. HIGH SPEED NEEDLE - This needle controls fuel flow in the high rpm range. Turning
clockwise makes the fuel lean and the reverse makes it rich. Set the needle 1/4 turns
open from a position where the peak rpm is obtained on the ground.
5. Do not overtighten the needles.
6. Warm up the engine before adjusting the carburetor.
7. Make sure to stop the engine while adjusting the carburetor.
1
/ turns open
4
1 1
/ ± / turns open
2 4
3