DLE 20 - Manual (Page 12)

12
Adjustment of the Engine
Each DLE Engine has been factory preset. However, differences
in elevation will infl uence the performance of the carburetor. To
obtain optimum output of the engine, slight adjustment of the
carburetor may be necessary.
Engine Functions and Adjustments
1. Choke Control (the choke control should be
used when the engine is cold)
2. Throttle
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 stop/closed position and then turn back 1.1 turns.)
High Speed Needle Adjustment
Turning the High-speed Needle (No.5) clockwise will lean the fuel/
air mixture at high speeds. Turning the low-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: