A XM Aviation UAT is a best method of reducing the possibility of air
bubbles in the engine fuel line. This is a very important aspect of the
operation of any turbine engine. Use a appropriate adapter for the 6mm
tube output of the UAT to the 4mm in the inlet side of the fuel pump,
direction of fuel flow is clearly shown at the top of the pump. The clear
4mm tubing is used on the pressure side of the pump. Clear tubing helps
identify and locate any potential future problems with air leaks.
The fuel pump and ECU can be mounted simply with a pair of tie wraps and/or Velcro. When
making any fuel line cuts use a sharp blade to make the cut squarely. The fuel filter provided
should be installed in an accessible place for regular inspection, close to the intake port of the
pump.
Fuel and Oil
1. Use CLEAN well filtered Jet A1 or kerosene fuel which is available from most airports, or
paraffin (K1) used for greenhouses available from most hardware stores. Diesel fuel can be
used, but startup time and acceleration could be worse than using kerosene. Diesel fuel vary
significantly between countries, you should test locally.
2. Ensure the fuel is clean and filtered at each stage of mixing and transfer to the model fuel
tank
. Please note the importance of using clean fuel. Failure to do so will result in blockages of
the fine fuel injectors in the engine or blockage of the engine lubrication system and
subsequent bearing damage.
3. Ensure the fuel is free from moisture (water is heavier than fuel and will settle at the bottom
of the container).
4. Use good quality oil:
-> Aircraft turbine oils e.g. Exxon 2380, Mobil JetOil II. Mix at 4%. Do not use Aeroshell 500.
-> Mobil DTE Light turbine oil. Mix at 5%.
-> Recommended: 3% Mobil DTE Light/Shell Tellus 32/Igol Turbine 32 + 1% 2T Oil fully synthetic
(JASO FC)
DO NOT USE TCW-3 oil. Don’t use JetCat oil at 5% on VT80/M100 engines.
5. The fuel must be mixed with oil in the recommended ratio. Too little oil will shorten the
bearings life. You can use higher content of oil (5-6%) without any problem for the engine to
share the same fuel with other engines. 2T oils are not recommended because they tend to
become sticky after use, causing the starter to fail to reach enough rotor speed for a successful
start, ecu displays “Bad Start” Message.
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Summary of Contents for Merlin M166TS
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