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STARTING THE ENGINE AND LAUNCH
PROCEDURE
There are several simple steps to starting the engine. It is
a good idea to have another person hold the boat in place
while you start the engine.
STARTING PROCEDURE
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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1. Carefully fill the fuel tank with the appropriate fuel/
oil mix.
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2. Carefully fill the oil tank with GrimRacer Cable
Oil (AQUB9550).
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3. Turn on the transmitter and receiver (in that order).
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4. Depress the priming bulb until you see fuel enter the
clear bulb.
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5. Remove the spark plug wire from the top of the
spark plug.
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6. Close the choke and pull the recoil starter briskly
five (5) times.
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7. Open the choke and replace the spark plug wire.
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8. Open the oil shut off clip.
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9. Pull the recoil starter to start the motor.
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10. If your engine does not start, repeat the starting
procedure, making sure fuel is in the fuel bulb.
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11. With the engine started, put the hatch cover back in
place. Secure the cowl by pushing down on the cowl locks.
BE CAREFUL NOT TO TOUCH THE SPINNING PROP!
TIPS & HINTS FOR DRIVING YOUR RIO 51
The ST. D/R knob (4) located on the front of the transmitter is
the steering dual rate adjustment. Turning the knob increases
or decreases the rudder movement. Your Rio 51 does not
require a lot of steering movement to allow the boat to turn.
Keep this in mind as you learn to drive your boat.
Due to prop rotation, it is the nature of model boats to
make smoother right turns than left turns. Unlike full-scale
boats, model boats like the Rio 51 race and turn best in a
clockwise direction.
Launch the boat in water that is at least 12" deep and free
of obstacles. Be sure to stay clear of the spinning prop
during the launch. It is best to have a buddy launch your
boat for you.
Slowly advance the throttle and note if the boat has a
tendency to turn right or left. Adjust the steering trim knob
(5) on your transmitter until the boat runs in a straight line
when the steering wheel is at neutral.
When finished running, push back on the throttle trigger
to stop the engine. Retrieve the boat, remove the cowl,
lock the oil shut off clip and turn off the receiver and
transmitter (in that order).
Take caution to not overheat the engine. Keep an eye on
the water outlet on the port side of the boat. You should
see water exiting the outlet when the boat is underway.
It is normal for the water to take a few seconds to start
flowing after launch.
If your engine should ever become submerged, remove the
spark plug and pull the handle of the recoil starter several
times until water has been expelled from the engine. Once
you are positive that all water has been removed from
the engine and the spark plug is completely dry, reinstall
the spark plug and perform the starting procedure. This
may take several attempts. Make sure you get the engine
running again as this will remove any remaining water
from the inside of the engine.
Be sure to keep your driveshaft well-lubricated. Failure
to do so may cause the cable to break. Remove and
re-lubricate the driveshaft after each day of running.
Do not use silicone fuel line as gasoline line. Use vinyl or
neoprene rubber gasoline line instead.
Total run time of the Rio 51 is approximately 25 to 35
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.
Windy conditions cause rough water that will affect the
performance of your Rio 51 and increase the chances of
capsizing. Take it easy in rough water until you learn to
drive the boat.
ENGINE ADJUSTMENTS
WARNING:
Never run an R/C boat engine at full throttle
(over rev) with the boat out of the water. Damage can
result.
Always make high- and low-speed needle adjustments when
the boat is out of the water and the engine not running.
Your Fuji-Imvac BT-28M comes preset from the factory, but
due to altitude changes and the fuel you are using, your
carburetor might need adjusting.
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