User manual DLE120

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.