684i B4 / TS / QS Engine Manual
more infos: www.3w-modellmotoren.com
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Use only ignition on/off switches recommended by 3W
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6 volts is required for the ignition.
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Do not skimp on your throttle servo. A high quality throttle servo is recommended for reliable
and accurate operation of the carburetor.
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Never fill the fuel tank via the carburetor fuel line
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Use the same I.D. for tank ventilation and the carburetor fuel line
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Use small plastic cable ties on all fuel line to fitting connections.
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We recommend cutting the fuel line in the fuel tank in half. And, then joining them back
together with a brass tube. The brass tube prevents a folding of the fuel line with could cut
the fuel supply for the engine (see tank photo).
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The use of soldered on DUBRO barbs on the ends of the brass tubing is highly recommended.
Again, always secure the fuel line with small plastic cable ties.
Warning!
Failing to read and follow all of the instructions in this manual can lead to unsafe conditions and
damaged equipment. Here are some examples:
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Unbalanced propellers can damage the engine's ball bearings, needle bearings, even
cause the crankshaft to break
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Incorrectly drilled propellers can lead to sheered propeller bolts further leading to accidents
and crashes
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Loose propeller bolts can also lead to sheered propeller bolts further leading to accidents
and crashes. Check these bolts before starting your engine.
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Flipping the prop with your hand or fingers can lead to serious accidents! Always use a
rubber stick to start the engine!
