Installation of carburetor components：
Following the above pictures connect the carburetor. Please attention the five ellipse holes and 90° of the mounting
bracket (F38264), and these five ellipse holes used to adjust position. Mounting bracket at 90 degrees can be intake
manifold (F38224) and the mounting surface integrity (If not 90°, it must be to adjust). Make sure the intake manifold
(F38224) will not rupture by pull down and up compressions. Above pictures ①-⑦ are fastening screws. Please don't
take them all tighten at a time. You should adjust the mounting bracket position and make sure the intake manifold is
not subject to tension and extrusion, and then tight the fastening screws one by one (according the situation ⑦ cannot
install ).
Carburetor setup, adjust; Lubricated tube and pulse tube connection:
FIG. 1 FIG. 2
NGH-GF38 four-stroke gasoline engine used Walbro WT1022 carburetor is designed for NGH unique. It has the perfect
stability of idle speed and acceleration sensitivity.
Always remove fuel from the carburetor after flight. Not doing so will result in rubber carburetor is components
deteriorating over time, causing loss of engine performance.
Methods: Start the engine without connecting the fuel pipe until we run out of fuel in the carburetor.
Setup Carburetor:
As shown in FIG. 1,
①—Choke： Close it before the first start the engine, and quickly rotating propeller, the fuel oil suction within the tank
into the carburetor, when you start the engine should be open it.
②—The throttle control arm： Infinitely adjustable-speed device, control the turning speed of the engine.
③—Nozzle： Connect the oil tank and supply the fuel to engine.
④—High speed needle.： After fully open the throttle control arm ②, adjust the high speed needle can get the best
high speed.
⑤—Idling speed needle： Put ② return to the initial position, adjust the idling speed needle can obtain satisfactory
low speed.
⑥—Idle mixture adjustment screw： Adjusting the fuel and air mixing ratio at idle, it actually control the initial
position of ②, adjust ⑥ and ⑤ will obtain the better idling speed.
The initial setup of the carburetor is factory settings, the engine first start don’t need to adjust.
The factory setting status:
④—High speed needle, Fully closed (clockwise) before exiting(anticlockwise) 1.5-1.75 times；
⑤—Idle speed needle, Fully closed (clockwise) before exiting(anticlockwise) 1.5-1.75 times；
⑥—Idle mixture adjustment screw, The throttle control arm at the other end of the limit pawl near the screw cone
about 1mm.
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