10
ENGINE TROUBLESHOOTING
The troubleshooting guide on the following page has been
provided to help you in diagnosing and repairing common engine
problems. Most difficulties with engines can be traced back to
problems with adjustment, fuel quality, dirt blockage, or common
parts that wear with everyday use.
Flooded Engine
The engine can become flooded if it is primed too many times
during the course of a routine start up. When the engine is
flooded, the EZ-Start
®
cannot turn the engine and it will appear to
be locked. Use the following procedure to clear a flooded engine.
1.
Remove the blue glow plug wire
2.
Remove the glow plug with a 5/16 or 8mm nut driver
3.
Plug in the EZ-Start and turn the truck upside down
4.
Push the EZ-Start button for several seconds to clear the excess
fuel from the combustion chamber
5.
Turn the truck over and re-install the glow plug with gasket
6.
Reconnect the blue glow plug wire
7.
Remove one of the motor wires from the EZ-Start motor
8.
Push the EZ-Start button for several seconds. This lights the
glow plug and burns off any remaining fuel
9.
Reconnect the EZ-Start motor
10.
Do not prime the engine. Partially open the throttle and press
the EZ-Start button. The engine should start immediately.
Glow Plugs
The glow plug in your engine is a consumable item which
must be replaced periodically to maintain peak performance
and starting ease. To test for a leaking glow plug, place a few drops
of fuel around the base of the glow plug when the engine is cool.
With the engine running, look for bubbles around the glow plug. If
the gasket is leaking, tighten the plug or replace the gasket.
If the “Glow Plug” LED fails to light, the glow plug may be bad
or broken.
However, glow plug performance can deteriorate
significantly before the element actually burns in two.
The only
sure way to test for a faulty glow plug is to replace it with a new
one to see if the problem goes away.
You can view the glow
plug element by removing it and touching it against the engine
head while pressing the EZ-Start button. The glow plug will not
light unless it is grounded against the engine. Glow plugs can be
damaged by particles in the combustion chamber or by running
the fuel mixture excessively lean.
Traxxas makes three glow plugs. The standard hot plug
(part#3230) is the stock replacement plug for Pro.15 engines. The
optional heavy-duty (part#3231) and super-duty (part#3232) plugs
will last longer in most cases, however, it is a medium temperature
plug so performance may be reduced slightly. Do not use plugs
with idle bars!
Carburetor
Dirt is the main enemy to your carburetor. If you notice a sudden
change in the fuel mixture (lean) and performance of your model,
you may have dirt lodged in the carburetor. To dislodge a dirt
particle in your carburetor try screwing the high-speed needle all
the way in and then back out to its original settings. If the engine
doesn’t return to normal operation, then try backing the mixture
screw out and priming the engine to force fuel through the
carburetor. Return the mixture screw back to its original setting.
The engine will be flooded at this point, so follow the directions
for relieving a flooded engine. If this fails, then the carburetor will
need to be removed and cleaned with denatured alcohol. Do
not blow on carburetor passages or fuel lines with your mouth.
Fuel and solvents are extremely poisonous. To prevent this from
occurring again, insert a fuel filter in the line between the tank and
the carburetor.
Piston stuck at “top dead center” (TDC)
“Top dead center” is the position where the piston is at the very
top of the tapered sleeve. Occasionally an engine can get “stuck”
at this position. This is most likely to happen on new engines
during break-in, but can also happen at other times. If the engine
is stuck at TDC, use the following procedure to release the piston
from the sleeve:
1.
Remove the glow plug using an 8mm (5/16”) nut driver and
verify that the piston is at the top of its stroke.
2.
Use a flat blade screwdriver to rotate the flywheel. Place the
blade of the driver into one of the grooves of the flywheel
and push down, turning the flywheel counterclockwise when
viewed from the front. The flywheel should turn, unsticking the
piston from the sleeve.
3.
Put two or three drops of light machine oil into the glow plug
hole to lubricate the piston and sleeve. Do not use too much
oil— It will hydro-lock the engine. Verify the starter will spin the
engine with the glow plug out.
4.
Rotate the flywheel so the piston is at bottom dead center and
replace the glow plug with gasket. Reconnect the blue glow
plug wire.
5.
You should now be able to start the engine with the EZ-Start.
Содержание Nitro Sport 4510
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