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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 stop/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.
Ignition Timing Adjustment
The ignition timing is preset on the DLE-85 at 44° 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 (45° advancing the ignition)
or counter clockwise (43° 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
1. The engine hesitates when accelerated rapidly.
2. The rpm increases at idling.
3. The engine stops when the throttle is moved from high to low.
Solution
The low-speed needle “L” is too lean. Open it about 1/8 of a turn
and try again.
Problem
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.
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