AquaCraft Air Force - Manual (Page 11)

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10. Remove the glow starter after 10-15 seconds.
IMPORTANT NOTE: Never place your finger over the
carburetor intake when applying the starter. Such an action will
cause an excess quantity of fuel to be forced into the cylinder
and result in a hydraulic lock that may damage the engine.
If the engine fails to start, refer to the “Engine
Troubleshooting” section on page 14.
In order to perform adjustments as needed, the break-in
procedure should be performed on dry land with your Air
Force securely held in place.
To insure long life and good performance from your
AquaCraft Pro .46 engine, you MUST break-in the engine.
The break-in period is critical for long life of the internal parts
of the engine. This should be done over the first 5 or 6 tanks
of fuel. If you have the HCAB27** RTR Airforce, then watch
the included video.
Fuels
Use nitro fuels that are specially formulated for model
airplane engines (this a boat, but it uses an airplane engine).
Typically this would be 10-20% nitromethane.
Some Things to Remember During Break-In
1. Use the same fuel that you will use for normal running.
2. Resist the urge to accelerate and decelerate the engine quickly.
3. Break-in puts stress on the glow plug and you can burn it
out during break-in. Make sure you have an extra plug or two
on hand.
How To Stop Your Engine
Just as squeezing the throttle trigger on your transmitter
increases power, pushing the trigger the opposite way
decreases power. Pushing the throttle trigger forward should
close the carburetor completely, cutting off air supply and
stopping the engine.
The First Tank
Your first tank of fuel should be running the boat at a very rich
high-speed needle valve setting. This allows the fuel to carry
as much oil as possible into the engine to lubricate the
internal parts during the break-in.
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1. Make sure the needle valve is 3 turns out from fully
closed (counterclockwise). This should be factory set already,
but check it to make sure. When closing the high-speed
needle, close the needle until you feel some resistance. DO
NOT overtighten or you will damage the engine.
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2. Start the engine.
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3. Once the engine is started, open the high-speed needle
valve around 1/8 turn at a time, finding the setting where the
engine just barely runs. This may take a few times adjusting
the needle. The engine will perform sluggishly and stall from
time to time – this is normal during the break-in process.
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4. Run the engine at a medium speed, periodically
accelerating and decelerating. Do not give the engine full
throttle at this time.
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5. Continue running the engine until the tank is almost out
of fuel. Do not allow the engine to run out of fuel. This leans
out the engine and can cause overheating.
Tanks 2-6
Turn in the needle valve (clockwise) around 1/8 turn from the
previous setting following each tank. You should notice that
the engine performs better during each run. After the sixth
tank, you should be near to the peak performance of the engine.
Ways To Ensure A Long Life For Your Engine.
1. Keep your engine clean. Dirt will act as insulation on an
engine. It will not be able to shed heat as easily.
2. Do not over-lean your engine.
3. Do not run your engine without a propeller.
4. Do not over heat the engine. This goes along with keeping
it clean and not over-leaning the engine.
5. Do not use a fuel with low oil content. Make sure that you
use a fuel from a reputable manufacturer that is labeled as
model airplane fuel.
6. Avoid using old fuels in the engine. Always run all of the
fuel out of the engine. After running for the day, use after-run
oil and work it into the engine by turning the prop 3-4 times.
7. Do not use a fuel with a nitromethane (often called nitro)
content over 20%.
8. Do not use silicone sealer on the engine joints. Silicone
sealer contains acetic acid, which is corrosive if it gets inside
your engine.
9. Store your engine someplace where it will not be subjected
to extreme temperature changes.
If you are having problems with your engine consult the
“Engine Troubleshooting” section on page 14 of this manual.
The following are some potential problems.
ENGINE MAINTENANCE
BREAKING IN THE ENGINE
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