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Traxxas Nitro Sport 45104-1, Operating Instructions Manual, Page: 13 / 16

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Traxxas Nitro Sport 45104-1 Operating Instructions Manual Download Page 13

13

STEP 

7:

Remove the 

3x23mm cap-head machine 

screws that fasten the header to the 

engine. 

Carefully 

remove 

the 

header 

to 

avoid damaging the gasket.

To separate the engine 

from 

the engine 

mount, remove the four 3x8mm cap-

head machine screws. 

Rebuilding 

the Engine

STEP 

1:

Remove the 4mm locknut from the front 

pipe hanger. Pull the pipe from the rear 

exhaust header.

STEP 

2:

Unplug the blue wire from the glow plug. Remove 

the fuel 

line from the 

carburetor inlet 

and from the 

exhaust header pressure fitting. Disconnect the red 

and black wires from the EZ-Start

®

 motor.

STEP 

3:

 

Remove the EZ-Start 

gearbox by removing 

the three 

3x8mm round-head machine screws.

STEP 

4:

Use a 2.5mm hex driver to remove the yellow 

ground wire from the engine mount. Move the 

EZ-Start wiring harness out of the way.

STEP 

5:

Use a 2.5mm hex driver to remove the three

 

remaining 

3x10mm 

cap-head 

machine 

screws

 

from the engine mount.

STEP 

6:

Pull the engine from the chassis. Turn the engine 

 

so that the throttle linkage to the carburetor will 

 

come out. 

Changing 

the piston 

and 

sleeve assembly

STEP 

9: 

Use a 5/16-inch nut driver to remove the 

glow plug and copper gasket. 

STEP 

10:

Use a 2.5mm allen wrench to remove the four 

3x12mm cap-head screws that fasten the cylinder 

head. Rock the cylinder head gently from side 

to 

side to 

release it 

from 

the sleeve. 

Note the 

thin aluminum head gaskets. We recommend that 

you replace 

these gaskets 

with new 

ones upon 

reassembly.

STEP 

11:

Remove the backplate and

 

the starter shaft. Replace the

 

backplate gasket with a new one 

during assembly.

STEP 

12: 

The piston and sleeve are a matched set. When the 

piston and sleeve are disassembled, they must be 

reassembled in the same orientation. Use a hobby 

knife to scratch a mark to indicate the location of the 

piston in relation to the pinning of the sleeve. 

STEP 

8:

Removing the carburetor is not necessary to rebuild 

the engine, unless you intend to replace the internal 

bearings of the engine. Remove the carburetor 

by loosening the 3mm locknut and pulling the 

carburetor straight up. 

Summary of Contents for Nitro Sport 45104-1

Page 1: ...MODEL 45104 1 OPERATING INSTRUCTIONS KC2218 R00 140919...

Page 2: ...ing Model engine fuel is flammable Never allow smoking sparks heat or flame in the presence of fuel or fuel vapors The engine brakes and exhaust system may become extremely hot during use Be careful n...

Page 3: ...ct sequence spread spectrum mAh Abbreviation for milliamp hour a measure of the capacity of the battery pack The higher the number the longer the battery will last between recharges Neutral position T...

Page 4: ...another the receiver in the model must be turned on within 20 seconds of turning on the transmitter The transmitter LED will flash fast red indicating a failure to link If you miss it simply turn off...

Page 5: ...t is best to position yourself in the middle of its running area not the far end so you drive the model toward and past your position In addition to maximizing the radio s range this technique will ke...

Page 6: ...from sticking at top dead center TDC A new engine will typically have a tight fit between the piston and the top of the sleeve This is a tapered fit and a tight piston sleeve fit on initial start up...

Page 7: ...oving through the fuel line up to the carburetor Watch closely The fuel moves very fast If the fuel doesn t move through the line within 5 seconds prime the engine by briefly one or two seconds coveri...

Page 8: ...nt The low speed mixture is always set after the high speed needle is correctly adjusted The low speed mixture will be set using the pinch test 1 Once the engine is warm do several high speed runs to...

Page 9: ...its normal ride height Shocks The four shocks on Nitro Sport have the most influence on its handling Whenever you rebuild your shocks or make any changes to the pistons springs or oil always do it car...

Page 10: ...use next time 10 Replace the glow plug reconnect the glow plug power wire and reinstall the air filter Maintenance Nitro Sport requires timely maintenance in order to stay in top running condition Neg...

Page 11: ...1 One way starter bearing slipping Remove EZ Start Clean or replace bearing page 13 12 EZ Start gears damaged Listen for excessive gear noise Replace gears motor 13 Glow plug wire loose from glow plug...

Page 12: ...atured 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...

Page 13: ...he engine from the chassis Turn the engine so that the throttle linkage to the carburetor will come out Changing the piston and sleeve assembly STEP 9 Use a 5 16 inch nut driver to remove the glow plu...

Page 14: ...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 s...

Page 15: ...step 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 Secu...

Page 16: ...radio communications The user is cautioned that changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment Canada...

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