AquaCraft Nitro Hammer - Manual (Page 6)

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. Make sure that you use a fuel from a reputable
manufacturer that is labeled as model engine 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 pulling the pull-starter 2-3 times.
7. Do not use a fuel with a Nitromethane (often called nitro)
content over 30%.
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 flowchart on the back cover of this
manual. The following are some potential problems.
Glow Plug
The glow plug is an item that will wear out and need replacement
from time to time. It is a good idea to remove the glow plug before
your first run, heat it and see how well it glows. You should see a
bright orange glow from the filament. If a coil or two will not glow
or the plug will not glow at all, replace the plug. If the engine quits
when you remove the glow starter, the plug might need to be
changed, although this may be because you are running too rich
and need to screw in your high-speed needle some. Look at the
glow plug when you are running the engine. If you see some
bubbles coming from around the plug, replace the glow plug
(copper) gasket, or both the plug and the gasket. The only real way
to test a glow plug is to replace it. Make sure you have a spare
plug or two on hand every time that you run the Nitro Hammer.
Fuel
Fuel can go bad. The main ingredient in model fuel is methanol,
which is basically a form of alcohol. Alcohols can absorb water
out of the air, so keep your fuel jug capped at all times. Store
your fuel out of the sunlight and in a cool place. Bad fuel is one
of the most difficult problems to diagnose in engines. If you have
tried everything you can think of to remedy an engine that is not
running correctly, try using some fresh fuel.
Fuel line is susceptible to pinhole leaks. You cannot see the
hole in the fuel line, but if you see bubbles in the line going
to the carburetor, replace the fuel line. Another symptom of a
leak in the fuel line is a surging engine. The properly tuned
engine will surge when the air bubbles enter the carburetor.
It is basically leaning out the mixture.
Overheating
One of the worst things you can do to your engine is overheat
it. The oils that lubricate the engine are carried in the fuel. If
your engine is set too lean, there will not be enough oil in the
engine to lubricate the internal parts. This will cause premature
wear in the engine and cause damage.
Running the Nitro Hammer:
• Before running your Nitro Hammer, it is a good idea to
check the water-cooling system to make sure all tubes are
properly connected.
• Check over all screws to make sure they are securely fastened.
• Place the boat in water that is at least 8" deep and free of
obstacles (weeds, sticks, ducks, muskrats, etc.).
• Periodically remove the drive shaft and relube with a thin
coat of petroleum jelly or light grease.
• CAUTION: It is common practice to slow down a little for
sharp turns. If you don't, there will be an increased chance of
flipping over.
• Slowly advance the throttle to full speed and note if the
boat has a tendency to turn right or left. Adjust the steering
trim knob on your transmitter until the boat runs in a straight
line when the steering wheel is at neutral.
• CAUTION: Windy conditions cause rough water that will
affect the performance of your Nitro Hammer and increase
the chances of capsizing.
• Total run time of the Nitro Hammer is approximately 6
minutes (assuming you begin with a full tank of fuel). When
you notice an increase in power, it means the fuel tank is
nearly empty and it's time to head for shore. As soon as the
boat reaches shore, stop the engine by pushing forward on
the throttle trigger; turn off the receiver and finally the
transmitter (in that order).
• CAUTION: The engine will be hot! Allow it to cool for a
few minutes before restarting.
• Your Nitro Hammer will often take on small amounts of
water, especially when running in rough water and when
making tight turns. Keep a roll of paper towels handy and dry
out the hull interior after every run. If you notice excessive
amounts of water in the hull, check for leaks, especially
around the hull/deck joint. You may reseal the joint using
medium cyanoacrylate (CA) glue.
• Always store your Nitro Hammer with the canopy/hatch
cover removed to allow the interior to dry out completely. If
you neglect to do this, it may result in corrosion of the
electronic components.
• IMPORTANT: If, for whatever reason, your boat takes on a
large amount of water, swamps or sinks, causing the radio
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