SPECIFICATIONS
Vehicle name GTX 4-TEC Series
Vehicle number
6141, 6142, 6143, 6144, 6147, 6148,
6149, 6150
ENGINE
Type
BOMBARDIER-ROTAX 1503, 4 stroke.
Single Over Head Camshaft (SOHC), liquid
cooled
Number of cylinder 3inline
Number of valve
12 valves (4 per cylinder) with hydraulic
lifters (no adjustment)
Displacement 1494 cc (91.2 cu. in)
Induction type
NA Models:
Naturally-aspirated
Supercharged Models:
Mechanically-
driven supercharger
Bore 100 mm (3.9 in)
Stroke 63.4 mm (2-1/2 in)
Compression ratio
NA Models:
10.6:1
Supercharged Models:
8.1:1
Type Dry sump (2 oil pumps). Replaceable oil
filter. Water-cooled oil cooler
Lubrication
Oil type
Refer to LIQUIDS section
Exhaust system
Water cooled/water injected. Direct
flow from propulsion unit
Rev limiter setting 7650 RPM
COOLING SYSTEM
Type
Liquid cooled. Closed circuit (see also
exhaust system)
Coolant
Ethylene-glycol 50%/50% antifreeze/water.
Coolant containing corrosion inhibitors for
internal combustion aluminum engines
ELECTRICAL SYSTEM
Magneto generator output
360 W @ 6000 RPM
Ignition system type Digital inductive type
Ignition timing Not adjustable
Make and type NGK, DCPR8E
Gap
0.75 mm (.030 in)
Spark plug
Quantity 3
Starting system
Electric starter
110
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