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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

Страница 1: ...OPERATING INSTRUCTIONS COVERS MODEL 4510 KC1149 R01 Rev 090806...

Страница 2: ...lt in property damage and serious injury You alone must see to it that the instructions are followed and the precautions are adhered to The Nitro Sport is not intended for use by children without the...

Страница 3: ...for nickel cadmium The original rechargeable hobby pack NiCad batteries have very high current handling high capacity and can last up to 1000 charging cycles Good charging procedures are required to...

Страница 4: ...ur frequency Therearesixdifferentchannelsnumbered1through6 Eachofthesixchannelsisrepresentedbyacolor Lookatthecrystal inthebackofthetransmittertodeterminewhichofthechannels yourtruckisoperating Cleari...

Страница 5: ...he best performing engine Make sure you are using a good quality battery pack that is fully charged new batteries usually require several charge cycles to reach peak voltage and full capacity This is...

Страница 6: ...f the ground BREAKING IN THE ENGINE VERY IMPORTANT Once your engine is running it must be broken in The key to breaking in your engine is patience The break in time will take about 1 to 1 hours During...

Страница 7: ...make several more high speed runs and retest 7 When the low speed needle is set correctly the engine s throttle response should be very quick Idle Speed Adjustment Once the high and low speed mixture...

Страница 8: ...nique Nitro Sport feature is the ability to change the gear ratios The final drive ratio of the gearbox is 2 81 to 1 Use the following formula to calculate the overall ratio Nitro Sport comes with a 7...

Страница 9: ...the crystal Connect the red and black cable from the battery holder to the batt terminal on the receiver The red wire is positive and the black wire is negative Place fresh AA batteries in the transmi...

Страница 10: ...xas 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 ca...

Страница 11: ...ure is too lean Richen the high speed mixture page 7 24 Idle speed set too low Increase idle speed page 7 25 Fuel flow blocked Check that all fuel lines are clear with no pin hole leaks Check for dirt...

Страница 12: ...he engine from the chassis Turn the engine so that the throttle linkage to the carburetor will come out STEP 9 Changing the piston and sleeve assembly Use a 5 16 inch nut driver to remove the glow plu...

Страница 13: ...t pin also Rinse thoroughly with denatured alcohol and lube with after run oil STEP 13 Pull the sleeve straight up and out of the crankcase If the sleeve will not move rotate the crankshaft until the...

Страница 14: ...14 STEP 25 To assemble the connecting rod and piston place a drop of castor oil in the top end of the connecting rod Insert the wrist pin through the piston and the top of the connecting rod Secure t...

Страница 15: ......

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