Traxxas TRX 2.5 Engine Multi-Shaft w/Recoil Start

Tower Stock# LXDAK4  •  Manufacturer Stock# 5209R
Traxxas TRX 2.5 Engine Multi-Shaft w/Recoil Start (large view)
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Notes from our tech department:
This is Traxxas's TRX 2.5cc Engine with Pull-Start.
This version of the engine is equipped with two different length crankshafts.
60% More Power that the TRX Pro .15 engine!
** This engine is a .15 engine. The 2.5 refers to a measurement of Cubic **
Centimeter displacement compared to Cubic Inch displacement (.15).
Loaded with advanced features such and the free flowing rear exhaust, the
unique composite slide carb, and innovative porting only found on the most
exotic racing engines.


Slide carburetor provides less restrictive, straight through airflow
for more power and better throttle response.
Exhaust Header features an extra-tough, finned mounting base that
dissipates heat and is sealed with a reliable O-ring gasket.
Molded head protector prevents damage to the head and secures the
glow plug wire.
Innovative cast cylinder head is engineered for the most heat
reduction possible.
Tubular header features smooth, rounded bends to eliminate exhaust
flow restriction and turbulence.
Ultra-low restriction air filter provides superior air flow and
filtration for more power and a long engine life.
Offset wrist pin further reduces piston slide loading for more
even cylinder wear, and longer engine life.


One 2.5 (0.15cu in) Engine with pull starter w/flywheel nut
One 25mm crankshaft end
One 15mm crankshaft end
One 90 degree air filter (includes base for upright mounting)
One 22 chapter Engine Set-up DVD
One owner's manual/instruction booklet
One bottle of air filter oil
One decal sheet


Muffler (exhaust system) depending on vehicle
Starting equipment
Traxxas 10-20% "Top Fuel" nitro fuel. TRAP5010 or TRAP5020


Displacement: 0.15 cu in (2.49cc)
Crankshaft Thread: 5mm
On-Center Mounting Holes, Front to Rear: 11mm (.433")
On-Center Mounting Holes, Side to Side: 31.4mm (1.24")
Back of engine(recoil)to front of drive washer: 73.2mm (2.88")
Height: 97.3mm (3.83")
Exhaust Port Diameter: inner - 9.9mm (.392")
outer - 13.0mm (.512")


This engine shares the same mounting dimension as the O.S. .12-.15 CV
Series recoil engines.
cmc 08/01/03

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