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http://www.ultralightnews.ca/ Page 23 of 36
The Ultralight News - your one stop Ultralight News.
5.6Adjustments
The system is adjusted at the factory. The idle was adjusted to 1400-1500 RPM without any load (without
propeller and gearbox). The throttle valves and throttle position sensor are synchronised to each other and
cannot be changed.
Attention: Don?t twist the adjusting screw (Figure 3.5-1 Position4) because the factory did the
synchronisation.
The only required adjustment is the idle. To do that you must please do the following:
1.Engine must be warm.
2.The load, which impacts the engine in idle position, has to be installed (propeller etc.)
3.The throttle cable must have a 2-4mm or 0.078-0.156 inches play while in idle position so the idle stop
screw is adjacent to the throttle stop (Figure 3.5-1-1Position 3).
An idle RPM is chosen so that the engine runs smooth and secure (recommendation: 1200-1800 RPM) To
make any necessary adjustment, turn the idle adjust screw in or out
(Figure 3.5-1Position 4). Clockwise turn increases RPM, counter clockwise decreases RPM.
Tip: Open throttle valves in order to better access adjustment screw.
Figure 3.5-1: Throttle body.
5.7Inspecting the air filters
To remove the air filters with a screwdriver, loosen the clamp on the air filter and pull the air filter from the
TBI flange.
Wash out the air filter with fuel and then dry. To do this, blow out the filter with compressed air from inside
to out. Check the filter for damage and replace with a new filter if necessary.
To install the air filter, place it on the TBI flange and fasten it again with the clamp. If the clamp is
defective, replace it immediately.
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