Traxxas 41094-1 User Manual
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 engi
ne mount. Move
the EZ-Start wiring
harness out of the way.
STEP
5:
Us
e a 2.
5m
m
hex
dr
iv
er
t
o r
em
ov
e t
he t
hr
ee
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 cylind
er head
gently
from side
to side
to release
it
from
the
sleeve. Note
the
thin alumin
um
head gaskets.
We
recommend that
you replace these gaskets with
new ones upon reassembly.
STEP
11:
Remove the backplate and the
starter shaft.
Repla
ce 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 engin
e,
unless
you intend to replace the internal
bearings
of the engine.
Remove
the carburetor
by
loosening
the 3mm
locknut and pulli
ng the carburetor
straight up.