DLE 170 - Manual (Page 12)

12
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.5) clockwise will lean the fuel/air
mixture at low speeds. Turning the Low-speed Needle (No.5) 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
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;
turn the needle to the fully stop/closed position and then open the
needle 1.25-1.5 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.
Ignition Timing Adjustment
The ignition timing is preset on the DLE-170 at 43° before top dead
center (TDC). The ignition timing can be advanced or retarded by
loosening the (2) ignition sensor Phillips head screws and sliding
the sensor to the full extent clockwise (44° advancing the ignition)
or counter clockwise (42° retarding the ignition). Be sure to retighten
the Phillips head screws after adjusting the ignition timing.
Advancing the timing causes combustion to occur earlier resulting in higher
performance of the engine. However, advancing the timing also causes
higher engine temperatures and can cause premature wear of internal
engine components.
Carburetor Adjustment Troubleshooting
Problem:
If The engine hesitates when accelerated rapidly.
or The rpm increases at idling.
or The engine stops when the throttle is moved from high to low.
Solution:
The low-speed needle “L” is too lean. Open it up about 1/8 of a
turn and try again.