AquaCraft Nitro Hammer - Manual (Page 5)

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3. Open the high-speed needle valve 2-1/2 turns out
(counterclockwise) from fully closed. The high-speed needle is
sticking up on the left side of the carburetor (looking at it from
behind the boat). If you have previously run the boat, keep the
same needle valve setting that you used on your last run.
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4. Prime the engine by pushing the primer button on the fuel
tank 2-3 times or until you see fuel entering the carburetor. The
quantity of fuel drawn into the engine by priming is an
important factor in starting the engine successfully.
IMPORTANT: The propeller will begin spinning as soon as the
engine starts! Be certain that the propeller is unobstructed;
failure to do so will damage the prop.
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5. Secure the glow starter onto the engine's glow plug.
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6. Check that the throttle is 1/8 open from the fully closed
position. Pull the handle of the recoil starter in quick, short
pulls. Repeat, if necessary until the engine fires. DO NOT
PULL THE RECOIL HANDLE OUT ANY MORE THAN 15
INCHES; DOING SO MAY DAMAGE THE PULLSTART.
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7. With the engine started, remove the glow starter after
10-15 seconds.
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8. Put the hatch cover back in place and replace the body
clip. BE CAREFUL NOT TO TOUCH THE SPINNING PROP!
If the engine fails to start, refer to the TROUBLE SHOOTING
CHART on the back cover.
Fuels
Use nitro fuels that are specially formulated for model engines.
Typically this would be 10-20% Nitro-methane car fuel.
In order to perform adjustments as needed, the break-in
procedure should be performed on dry land with your Nitro
Hammer securely held in place.
To insure long life and good performance from your AquaCraft
Pro .15 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. Be sure
to watch the engine tuning video that came with this kit.
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 boat 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 will
close off the throat of the carburetor completely, cutting off air
intake 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.
1. Open the needle valve 2-1/2 turns out from fully closed
(counterclockwise). This is 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 carburetor.
2. Start the engine.
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.
4. Place the boat in water and run the engine at a medium
speed, periodically accelerating and decelerating.
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. You should notice that the engine performs
better during each run. After the 6th 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.
ENGINE MAINTENANCE
BREAKING IN THE ENGINE
Carburetor Partially Open
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