Carburetor settings for .21 Buggy engines: The carburetor of our NOVA/REX/TOP Engines are set at the factory with an vacuum measuring tool, before they are put in box, to obtain an setting for an easy start of your engine. If you are in trouble with your carburetor setting, this is a simple way to get back to the initial factory setting positions. |
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 | | The High Speed Needle (A) is in charge to adjust the quantity of fuel necessary for the engine when the slide of the carburetor is full opened.
For a correct position, turn the needle-valve (clockwise) until it stops. It’s the fully closed position
(WARNING: do not force it to close it any futher, it will damage the needle!).
The High Speed Needle position is approximately 4.5 turns opened from the fully closed position. | | |
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The Low Speed Needle (B) situated on the throttle is in charge to adjust the fuel flow when the throttle valve is moving with the throttle servo.
The position of the Low Speed Needle must be flush with the housing. | |  | |
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The Idle screw (C) of your carburetor is used to adjust the air flow when the throttle is in the closed position (minimum RPM idle speed).
It must be turned to obtain a throttle setting of approximately 0.6 mm open once the throttle valve is closed
(see picture on the right). | |  | |
WARNING:
These settings help you to start your engine and are on the rich side, you still need to adjust your carburetor to get optimal performance.
This can varie on many different things like the fuel you use, the weather, tracks and your driving style. PICTURES ARE JUST INDICATIVE. |
