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Running in the engine
Recommendation: Use an already mixed brand fuel which usually contains
additional additives which are advantageous for the engine.
If you nevertheless want to mix the fuel yourself, you must use high-quality fuel
components (synthetic oil, nitromethane, methanol).
Before the first startup, the engine needs an initial running-in phase. Thereby, very fine
machining traces on rotating or jointly gliding components are smoothed. Special running-in
fuel usually contains a smaller amount of nitromethane.
Carefully screw in the enclosed main throttle needle (needle with fuel intake) up to the limit
stop; then open it by 2-3 turns. Turning out gives a richer mix, turning in a leaner mix. The initial
running-in phase at low speed (with fully open choke tap and extremely rich mix) should
average 2-4 tank fillings. After each engine running (tank filling), allow for a sufficient cooling
phase.
Afterwards, the mix should be made leaner step by step by screwing in the main throttle needle
and the model can already be used. The final running-in of the engine can, depending on the
model, last several hours. After this phase, you can operate the engine with full power.
Important!
With a new engine, the carburettor setting must be adjusted, from the start, as
rich as possible. It is only in the course of time that one can approximate the
maximum engine power. Now you can also properly adjust the idle speed.
A too rich carburettor setting prevents the engine from running at full power.
However, a setting that is too lean is dangerous for the engine and, sooner or
later, leads to an engine damage!
Troubleshooting
Problem
Solution
The engine does not start
• Glow plug defective, replace it
• Glow plug does not glow properly; check the leads
Engine stops after a short run-
• Engine gets too much fuel (kicks back); check the
ning time or after having discon-
nected the start battery
• Engine gets too little fuel (does not start); check the
• Engine does not ingest any fuel; check the fuel
Power decreases after reaching
• Glow plug defective, replace it
operating temperature, the en-
• Too high water proportion in the fuel; use brand fuel
gine runs inconsistently
• Check the carburettor setting
• Carburettor, filter or fuel line dirty; clean them
• Loose glow plug or cylinder head
• Fuel line bent/defective; replace the hose
• Engine becomes too hot; running-in phase is not
• Change the carburettor setting (use a richer mixture)
• Ensure sufficient cooling
• Engine is set too "sharp"; change the carburettor
• Glow plug defective or wrong glow plug value; use a
• Keep the engine in a dry room with little humidity
and start battery
carburettor setting or unscrew the glow plug and let
the engine race several times
carburettor setting
setting and the filters for passage and tightness or
check the carburettor setting
or keep the fuel canister closed
completely
carried out correctly
setting
different glow plug
Maintenance and service
• Always use a fuel filter between tank and engine.
• Always keep the fuel canister clean.
• Only use brand fuels and synthetic oils!
• Always empty the tank after operation of the model.
• In case that a foreign body penetrates the engine, disassemble the latter and rinse it
generously with fuel. Afterwards, clean all parts with a non-corroding oil.
• Do not disassemble the engine unnecessarily.
• Check the engine for damages and wear when it has not been used for a longer period of
time.
• Keep the engine in a dry room with little humidity.
Technical data
The technical data are details of the manufacturer; no guarantee of correctness! Subject to
change without prior notice.
Displacement: ..................... 5,24ccm
Power: ................................. 2,2kW (2,99hp), 25000 rpm
Engine speed: ..................... 5500-32000 rpm
Bore: .................................... 20,1mm
Stroke: ................................. 16,6mm
Weight: ................................ 474g
Dimensions A x B: .............. 37,5 x 21mm
Dimensions C x D: .............. 84,3 x 116mm
A
B
These operating instructions are a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1,
D-92240 Hirschau (www.conrad.com).
All rights including translation reserved. Reproduction by any method, e.g. photocopy, microfilming, or the
capture in electronic data processing systems require the prior written approval by the editor. Reprinting,
also in part, is prohibited.
These operating instructions represent the technical status at the time of printing. Changes in technology
and equipment reserved.
© Copyright 2010 by Conrad Electronic SE.
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