15
Adjustment of the Engine
Each DLE Engine has been factory preset. However, elevation
changes will infl uence the performance of the carburetor. To
obtain optimum output of the engine, slight adjustment of the
carburetor maybe necessary. Also, for safety reasons do not make
adjustments to the carburetor while the engine is running.
Engine Functions and Adjustments
1. Choke Control
(the choke should
be used when the
engine is cold)
2. Idle Adjustment
Screw
(adjust the
idle speed)/
Throttle
Stop
3. (L) Low-Speed
Needle
(adjusts the
fuel/air mixture at
low speeds)
4. (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 open the needle 1.25 turns.)
