MufflLers
The Zenoah RC motor comes equipped with a standard Zenoah steel canister muffler. The helicopter can be flown with this muffler
however it does not offer a pleasing sound or improved performance. There are a number of aftermarket mufflers available for the
Zenoah motors that will improve the sound significantly. Power improvements are based on too many factors to make a specific
comparison
Good results have been had using the following optional mufflers:
• Hatori 957 (SB-12R4)
• RJX Gas Muffler
• TRM Power Pipe
• Zimmermann Gas Muffler 2651
After the motor has been run, re-check the muffler bolts to make sure they are tight. Do this for a couple of flights and then it will no
longer be necessary unless the muffler becomes obviously loose.
Air Filter
The Zenoah RC format motors ship with an air cleaner. It is recommended that you always use an air cleaner whether it’s the stock
one or an optional one such as those offered by Miniature Aircraft (MA133-150). Running an unfiltered intake will shorten the life of
the motor especially in the case of a crash where a large amount of foreign matter can be ingested into the motor.
Spark Plug
The spark plug included with the motor will normally operate correctly for a very long time. However if you should replace it MAKE
SURE that you use a “resistor” plug. The plugs designation will usually end in an R. Failure to do this will result in you losing control of
your model due to ignition interference with your radio
electronics Wiring
The configuration of the Whiplash is such that only two electronic components must be in the general area of the ignition system on
the motor. Take care to keep any wiring away from direct contact with the ignition wire as this can cause unexpected results. It is NOT
necessary to run any additional shielding or insulated caps especially with 2.4Ghz radios but you may if you desire
If you are still running a PPM/PCM style radio, do not route the receiver antenna within 4 inches of any part of the ignition system
It is suggested that if possible you present at least one Receiver antenna on each side of the model. If you are running a receiver with
multiple antennas try to position one on each side of the model. If your radio system uses satellites, it is suggested to install one on
each side of the model. This will ensure that your receiver will be able to receive signal regardless of model orientation while flying
The model has two locations for an electronics on/off switch. Either position is suitable however it is suggested that you use a heavy
duty switch due to the additional vibration that is typical of a gas powered engine.
Initial Mixture settings
Locate the low speed needle that is marked on the carburetor with an “L”. This will be the one closest to the cylinder. Using a
screwdriver turn it clockwise until it seats closed.
Don’t overtighten. Now open the low speed needle 1-3/8 turns
Locate the high speed needle that is marked on the carburetor with an “H”. This will be the one closest to the air filter or the intake side
of the carburetor. Using a screwdriver turn it clockwise until it seats closed.
Don’t overtighten. Now open the high speed needle 1-1/2 turns
This is a suitable initial setting at normal altitudes. At high altitudes a slightly leaner mixture may be needed
Turning the needles counter clockwise causes the mixture to be richer and turning them clockwise caused a leaner mixture
The needle settings are very sensitive especially the low speed needle. Very small adjustments are recommended, movements on the
order of 1/16th of an inch at a time are appropriate.
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