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Maintaining and Storing Your Jato 3.3
Your Jato requires timely maintenance in order to stay in top running
condition. Neglecting the maintenance could allow dirt, deposits, and
If the engine is worn or
moisture to build up inside the engine leading to internal engine
damaged enough to require
failure. The following procedures should be taken very seriously.
replacing the piston, sleeve,
or connecting rod, consider
After each hour of running:
exchanging your old engine
for a brand new engine
under the terms of the
Traxxas Lifetime Engine
Replacement Plan (ERP).
It could save you time and
effort. Details are in your
model's documentation
package.
After each running session:
The TRX 3.3 Racing Engine is
designed to be easy to
rebuild. Critical engine
components such as the
crankcase, crankshaft, and
engine bearings are made
to extremely high quality
standards and should under
normal circumstances
outlast multiple sets of
pistons, sleeves, connecting
rods, and wrist pins
(reciprocating assemblies).
It could be more economical
for you to continue to use
your good bearings and
crankshafts, and simply
replace the reciprocating
assembly as needed. Engine
assembly is not difficult and
replacing the reciprocating
assembly does not require
any special tools or skills.
40 • Jato 3.3
Clean and re-oil the air filter. The instructions for this procedure are on
page 22. We cannot stress enough the value of cleaning your air
filter at the scheduled intervals. The cleanliness and condition of your
air filter directly influences the running life span of your engine.
skip air filter maintenance!
Clean the outside of the engine of accumulated dirt, oil, and grime.
Accumulated grime will decrease the engine's ability to cool itself.
Perform after-run maintenance on the engine. This clears the engine
of destructive moisture and other corrosive deposits.
important for the life of the engine.
See page 41 for after-run
maintenance procedures.
Inspect the gears for wear, broken teeth, or debris lodged
between the teeth.
I
nspect the vehicle for obvious damage or wear. Look for:
1. Loose or missing screws.
2. Cracked, bent, or damaged parts.
3. Cut or loose wiring.
4. Cut or kinked fuel lines.
5. Signs of fuel leakage.
Other periodic maintenance:
Connecting rod: The connecting rod should be replaced when the
piston and sleeve are replaced. Also replace the piston wrist pin and
G-clip whenever the connecting rod is replaced. As with other internal
engine components, connecting rod life depends on the engine's
usage and the quality and frequency of the engine maintenance.
Inspect the connecting rod after 3-gallons of fuel have been used.
Slipper clutch pads (friction
Do not
material): Under normal use, the
friction material in the slipper
clutch should wear very slowly.
If the thickness of any one of the
slipper clutch pads is 1.8mm or less,
the friction disc should be replaced.
Measure the pad thickness using calipers or measuring against
the diameter of the 1.5 and 2.0mm hex wrenches provided with
This is extremely
the model.
Piston/sleeve: The life of the piston and sleeve will
vary greatly with how the engine was used and
maintained. The piston and sleeve should be
replaced when they no longer seal effectively (loss
of compression). Symptoms include the engine
being difficult to start when warm, stalling when
warm, and stalling when throttle is suddenly closed
to idle. Replace the wrist pin and G-clip whenever
the piston and sleeve are replaced.
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