DLE 20RA - Manual (Page 14)

14
Adjustment of the Engine
Each DLE Engine 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 adjust the
carburetor while the engine is running.
Engine Functions and Adjustments
1. Choke Control (the choke control should be used
when the engine is cold or the fi rst run of the day.)
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 #3
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 #4
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 1.5 turns.)
High Speed Needle Adjustment #5
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: