DLE 120 - Manual (Page 14)

14
Adjustment of the Engine
Each DLE has been factory preset. However, higher elevations will
infl uence the performance of the carburetor. To obtain optimum output
of the engine, slight adjustment of the carburetor may be necessary.
For safety reasons, do not make adjustments to the carburetor
during operation.
Functions and Adjustments
1. Choke Control (the choke control
is used under the circumstance
of cold start-up)
2. Throttle Control
3. Idle Adjustment Screw (adjust
the idle speed)
4. (L) Low-speed Needle (adjusts
the fuel/air mixture at low
speeds)
5. (H) High-speed Needle (adjusts
the fuel/air mixture at high
speeds)
Idle Adjustment
Turning the Idle Adjustment Screw
(No.3) clockwise will increase the
idle speed. Turning the Idle Screw
counter-clockwise will decrease
the idle speed.
Low Speed Needle Adjustment
Turning the Low-speed Needle (No.4) clockwise will lean the fuel/air
mixture at low speeds. Turning the Low-speed Needle (No.4) counter-
clockwise will richen the fuel/air mixture at low speeds. (The default
or factory setting of the Low-speed Needle is as follows: turn the
needle to the fully closed position and then open the needle 1.25 turns)
High Speed Needle Adjustment
Turning the High-speed Needle (No.5) clockwise will lean the fuel/
air mixture at high speeds. Turning the High-speed Needle (No.5)
counter-clockwise will richen the fuel/air mixture at high speeds. (The
default or factory setting of the High-speed Needle is as follows: turn
the needle to the fully closed position and then open the needle 1.5
turns). It is recommended that the High-speed Needle be adjusted
by the use of a tachometer to obtain maximum speed.
Smooth acceleration and deceleration is an indicator of proper
engine performance.