Page 16 - Arrow Shark 2020 RC Boats

B: High-Speed Needle
When this needle is correctly set, the engine will run cleanly, accelerate well from half throttle without
hesitation, and will not lose RPMs during turns. It is tempting to lean the high speed needle to optimize the
mixture for peak power and on - water RPM, but going too lean can be risky as the engine will suffer from
overheating and reduced lubrication. This can lead to damage or shorter life for your engine. If the engine
stops or loses RPMs when your boat is running on the water, the high speed needle is probably set too
lean and you need to screw it out slightly. If the engine is not running cleanly and seems to hesitate or not
reach peak RPMs, then the high speed needle is probably set too rich and you need to screw it in slightly.
Running with a slightly rich mixture may cause a small drop in top speed, but it will allow your engine to run
cooler and with good lubrication for reliability and long life.

Launching And Running Your Boat

*Before the first run each day:
a)Carefully check over the boat as explained in previous steps to ensure nothing is loose and that all the cooling
lines are correctly attached.
b)If there are other radio control models in the vicinity, check with the operators that your radio is not on the
same frequency. If it is, make arrangements to run your models at different times. This step does not apply if
your radio is on the 2.4GHz band as this automatically selects an available frequency.
c)Turn on your radio and check that it is operating correctly; carry out a range check as explained in your radio
instruction manual.
d)Check that your Fail Safe is working correctly.
e)Look around and ensure that the area where you will be operating the boat is clear and there are no people,
other boats (models or full size) or debris in the water.
f)Study the area where you plan to put the boat in the water and check that there are no obstructions or weed, and
that the water is deep enough.
g)If other RC boats are running, especially if it is an RC Boat Club area, find out any rules about in which
direction the boats run. In most cases, boats run in a clockwise circuit (ie turning to the right). Do not run your
boat in a different direction to the others, and keep to any defined circuit.
h)If other people are close by where you are starting your engine, make sure they keep clear of the boat ­
especially keep them well away from the prop.
i)Review all the safety procedures mentioned at the start of this Manual.
j)Make sure you have some method of retrieving your boat should it stop on the water for any reason. Never
swim out to retrieve a boat. Some people have a small inflatable dinghy they use as a "rescue boat". If your lake
or pond is not too big, you can use a tennis ball on a long length of light line. Throw the ball over the stalled boat
and gently pull on the line to bring back the boat. If in doubt about rescue methods, check with your local RC
Boat Club.

*Fill the gas tank and start the engine as explained earlier. Wait a few seconds to ensure the engine is running
correctly. Momentarily advance the throttle and check that the clutch engages to spin the prop.
*Fit the engine hatch to the boat, ensuring the latches are secure.
*Whilst you can launch the boat yourself, it is best to have a friend take the boat to the water while you hold the
transmitter. If you do launch yourself, practice first without the engine running so you can safely put the boat in
the water. It may be best to first put the transmitter in a safe spot near the water's edge before putting the boat in
the water, rather than risk dropping it while carrying both it and the boat.
*When carrying the boat, always watch that nothing is close to the prop and that you keep clear of other people.
*Gently place the boat in the water with the front pointing out into a clear area.
*If other RC boats are running, make sure they are well clear before slowly pulling the transmitter trigger and
accelerating your boat away from the shore.
*Allow the boat to rise on plane but keep to around half throttle and check the steering by operating the rudder.
*As soon as you can, whilst allowing for any other boats or circuit­keeping requirements, bring your boat back
past where you are standing and check that water is flowing through both outlets. Get into the habit of checking
for water flow every time the boat goes past. Weed or debris in the water can block pick­ups at any time and
quickly cause overheating and damage to your engine.
*Enjoy running your boat, gradually increasing speeds (but remembering to properly break­in the engine) and
becoming familiar with how your boat turns and handles in different water conditions.
*When you are ready, prepare to bring your boat back to the shore. Do this before your engine runs out of fuel.
The gas tank should give you about 20 minutes running time.
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