Operations Manual
HKS 700E
21
7.4. Carburetor adjustments.
NOTE!
The combustion condition of both cylinders is very important to
achieve a smooth running engine. Carburetor adjustments are a flight critical
operation; if you do not have experience in this operation, please get qualified
assistance.
7.4.1. Idle speed adjustment
•
For the first adjustment, turn back the stop screw so that the throttle
valves close completely.
•
Attach the vacuum gauges on both carburetors.
NOTE!
The nipple for the vacuum gauge is attached at the side of the float
chamber. Remove the screw and attach the vacuum gauge tube.
•
Open the idle mixture screw approx. 1-1/2 turn.
•
Warm the engine up.
•
Keep throttle lever OFF.
•
Keep idle revolution of low vibration between 1400 and 1750 r/min,
adjusting both idle stop screws so that the vacuum readings are same.
•
Confirm smooth running at idling.
7.4.2. Throttle cable adjustment
NOTE!
This adjustment is very important. Both throttle valves must start to
open at the same time.
•
After idle adjustment, let the engine run at 2000 r/min.
•
Check both vacuum readings.
•
Adjust the throttle valve position by turning the outer-tube adjustment
nut so that vacuum readings are same.
•
Tighten the lock nuts.
•
Remove the vacuum gauges.
DANGER
!
The rotating propeller is extremely dangerous! Adjustments must be done
with the utmost caution from behind the engine. The aircraft must be tied
down or properly chocked. Do not perform this operation without a safety
observer.
