TLR TEN-SCT RTR, Instruction Manual

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EN
7 TLR TEN-SCT RTR • INSTRuCTIoN maNuaL
Leaner Richer
CaRB adjuSTmENTS:
Make all carburetor adjustments
in one-hour increments.
Imagine the slot in the needle is the
hour hand on a clock. Adjust it as
though you were moving the hour
hand from one hour to the next
or previous one.
1 H
our
2 H
our
Low-Speed adjustment
The low-speed adjustment affects the idle and slightly-off-idle performance. The
optimum setting allows the motor to idle for at least 8−10 seconds. The model
should then accelerate with a slight amount of sluggishness and a noticeable
amount of smoke. The simplest way to check this is to make sure the engine
has been warmed up and let the engine idle for 8−10 seconds. If the low-speed
mixture is so far off that the engine won’t stay running that long, turn the idle
stop screw clockwise, increasing the idle speed. With the engine at idle, pinch
and hold the fuel line near the carburetor, cutting off the flow of fuel, and listen
closely to the engine rpm (speed). If the low-speed needle is set correctly, the
engine speed will increase only slightly and then die. If the engine increases
several hundred rpm before stopping, the low-speed needle is too rich. Lean the
mixture by turning the needle clockwise one hour and trying again. If the engine
speed does not increase but simply dies, the needle is too lean and needs to be
enriched by turning the needle counterclockwise one hour before trying again.
After you have optimized the low-speed setting, the engine will probably be idling
faster. You will have to adjust the idle stop screw counterclockwise to slow the
engine idle speed down. The engine should accelerate at a constant pace
without hesitating.
High-Speed adjustment
After initial acceleration, the engine should pull at a steady rate while maintaining
a two-stroke whine and a noticeable trail of smoke. If the engine labors and is
sluggish with heavy smoke, the mixture is too rich and needs to be leaned by
turning the high-speed needle clockwise in one-hour increments until it runs
smoothly. If the engine isn’t smoking or starts to die after acceleration, it is too
lean and you must enrich the mixture by turning the needle counterclockwise.
Don’t be confused by the sound of the engine and the actual performance. A
leaner mixture will produce an exhaust note with a higher pitch but this does
not necessarily mean improved performance, as the engine is on the verge of
overheating and may incur possible damage. Ideally, you want to run the engine
so that it is on the slightly rich side of optimum. This will give you the best
combination of speed and engine life.
If the engine accelerates rapidly with a high-pitched scream and seems
to labor, stop smoking or lose speed, the engine is too lean. Varying terrain,
atmospheric conditions and drastic altitude changes can all affect the
fuel mixture. Normal engine operating temperatures should range
from 190–220°F (88–105°C).
NoTICE:
If the engine is too lean, immeditately enrich the fuel mixture
by turning the high-speed needle counterclockwise at least "two hours".
Failure to do so could result in permanent engine damage.
about Glow Plugs
The glow plug is like the ignition system in your automobile. The coiled element
in the center of the plug glows red hot when power is applied to it. This is what
ignites the fuel/air mixture when compressed in the cylinder. After the engine
fires, the heat generated by the burning fuel keeps the element hot. Common
reasons for the engine not starting are the glow plug being wet with fuel, low
voltage in the battery or the element is burned out. Disconnect the igniter lead
from the glow plug in the engine and connect it to a spare plug, holding it up
against the head or engine case so it is grounded. Press the starting button, and
if the plug glows, you know that the plug in the engine is bad and needs to be
replaced. A wet glow plug means there is excess fuel in the engine. To clear this,
pick up the model and let the front end hang down. Open the throttle all the way
and try starting the engine for 2 or 3 seconds. If it does not fire, stop and wait
for at least 5 seconds and try again. If it does start to fire, close the throttle then
pull the trigger 1/4-inch and continue to turn it over until it starts and clears out.
Release the trigger so the engine idles, place it on the ground and start driving.
using the R.o.S.S. Starting System
Before starting your new vehicle for the first time, it is extremely important that
you read and understand the R.O.S.S. unit instructions. Failure to follow the
engine starting instructions can cause immediate engine damage.
R.o.S.S. oVERCuRRENT PRoTECTIoN CIRCuIT
The Losi R.O.S.S. starting system features overcurrent protection and low
voltage cutoff. If the electric current exceeds the amount of current the battery
can provide, the ROSS unit will power off to protect the battery. The overcurrent
protection activates most often when the engine is new. During the engine
break-in process, it is common for the piston to get stuck at the top of
the cylinder sleeve. To reset the overcurrent protection:
1. Power off the vehicle.
2. Put the vehicle upside down on a solid surface.
3. Use a standard screwdriver to rotate the engine flywheel 1/4 turn
toward the outside of the chassis.
Use a screwdriver to rotate
flywheel 1/4-turn in this direction
4. Turn the vehicle upright and power on the vehicle.
5. Try to start the engine again.