and listen to how the engine speeds up or slows down.
If the engine increases its speed for about 2 or 3
seconds and then loses speed, the needle is set
correctly. If the engine loses RPM quickly, it is set too
lean and the low-speed needle needs to be opened
(counterclockwise)
to richen the mixture. Pinch again
to check the mixture. If the engine takes longer than 4
seconds to slow down, lean
(clockwise)
the low-speed
needle and then pinch again to check the mixture.
The Throttle Stop Screw
On the front of the carburetor, there is a black screw.
This is called the idle stop screw. This increases or
decreases the idle RPM without changing the fuel to
air mixture. The barrel should be approximately
1.5mm (between 1/32" and 1/16") from fully closed.
To insure long life and good performance from your
Torq .21 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. Run with the body off. This will keep the engine cooler.
2. Keep the air cleaner on at ALL times
3. Run on a smooth, hard surface. An empty parking
lot is perfect.
4. Use the same fuel that you will use for normal running.
5. Resist the urge to accelerate and decelerate the
truck quickly.
6. 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.
7. Do NOT overheat the engine. You can check the
head temperature by using one of the temperature
gauges that are available or by putting a drop of
water on the top of the cylinder head. If the water
boils away immediately, shut off the engine and
allow it to cool. If it takes more than 10 seconds to
boil away, the engine is at proper running
temperature for break-in.
Before running the engine, read the manual and watch
the engine video that came with this kit.
There are several simple steps to starting the engine:
1. Install a glow plug if one is not in your engine. This
threads into the top of the cylinder head.
2. Fill the tank almost to the top. Leave a little air at the
top of the tank.
3. Prime the engine by turning the flywheel on the
engine. Watch the fuel go through the line and
when it gets to the carburetor, turn the flywheel one
more full revolution.
4. Open the high speed needle valve exactly 3 turns
out
(counterclockwise)
from fully closed.
The
high-speed needle is sticking up from the
carburetor inside the brass housing.
All of the
carburetor settings are adjusted with a flat bladed
screwdriver. If you have previously run the truck,
keep the same needle valve setting that you used
on your last run.
5. Start the engine by pulling the recoil - Use short,
quick pulls.
DO NOT
pull the recoil starter’s string to
the end. You only need 10 to 12 inches of pull to
start the engine.
If the engine does not start after several pulls,
sometimes it is helpful to start the engine at around
half throttle. Have a friend pull back on the throttle
some while you start the engine. This
may
be an
indicator that the low speed needle setting needs to be
adjusted. When the engine starts, immediately return
the throttle to idle. If this is not done the engine can
over-rev and cause engine damage.
If the engine is
difficult to turn over with the recoil starter,
especially if it is brand new, loosen the glow plug
a half turn before starting the engine. This allows
some compression to escape, but the engine will
still start.
Make sure you tighten the glow plug
after the engine starts.
If the recoil starter is still
difficult to pull, the engine is flooded – there is too
much fuel inside the engine. Remove the glow plug
and air cleaner, then turn the engine upside down and
pull the recoil 5 or 6 times. This will clear the engine of
fuel, and you will notice the recoil pulls easier. Replace
the glow plug and repeat the starting procedure.
Fuels
Use fuels that are specially formulated for car and
stadium truck engines. DuraTrax Red Alert fuel is
specially formulated for buggy engines like the Torq .21.
RUNNING THE ENGINE
BREAKING IN THE ENGINE
1/32" TO 1/16" GAP
15
