DLE 35RA - Manual (Page 15)

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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 1.5 – 2 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-35RA at 46° before Top
Dead Center (TDC). The ignition timing can be advanced or retarded
slightly by loosening the (2) ignition sensor phillips head screws
and sliding the sensor to the full extent clockwise (47° advancing the
ignition) or counter clockwise (45° 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.
Problem:
If The idle is not steady.
Solution:
The low-speed needle “L” valve is too rich. Close it 1/8 of a turn
and try again.