SeaDoo Rotax 1503 4-Tec 2005 - Technical Specifications

Section 01 ENGINES (1503 4-TEC)
Subsection 08 (TECHNICAL SPECIFICATIONS)
TECHNICAL SPECIFICATIONS
ENGINE NATURALLY ASPIRATED SUPERCHARGED
Engine type
ROTAX 1503 4-TEC, 4-stroke, Single Over Head
Camshaft (SOHC), liquid cooled
Number of cylinders 3
Number of valves 12 valves with hydraulic lifters (no adjustment)
Bore
Standard
100 mm (3.9 in)
Stroke 63.4 mm (2.49 in)
Displacement 1493.8 mm
3
(58.81 in
3
)
Compression ratio 10.6:1
SC engine: 8.1:1
SC IC engine: 8.4:1
Induction type Naturally-aspirated
SC engine: gear-driven
supercharger
SC IC engine: gear-driven
supercharger with air/water
intercooler
Maximum HP RPM 7300 ± 50 RPM
SC engine: 7300 ± 50 RPM
SC IC engine: 8000 ± 50 RPM
Type
Dry sump (2 oil pumps). Replaceable paper type oil
filter. Water-cooled oil cooler
Lubrication
Oil type
10W40 4-stroke oil
(API service classification
SL, SJ or SH)
XP-S 10W40 or
an approved equivalent
Intake valve opening
10° BTDC
Intake valve closing 45° ABDC
Exhaust valve opening
50° BBDC
Exhaust valve closing 5° ATDC 0° ATDC
Minimum (new) 5.961 mm (.2347 in)
Maximum (new) 5.975 mm (.2352 in)Intake
Wear limit 5.930 mm (.2330 in)
Minimum (new) 5.946 mm (.2341 in)
Maximum (new) 5.960 mm (.2346 in)
Valve stem diameter
Exhaust
Wear limit 5.930 mm (.2330 in)
Minimum (new) 5.99 mm (.2358 in)
Maximum (new) 6.01 mm (.2366 in)Valve guide diameter
Wear limit 6.060 mm (.2386 in)
Nominal (new) 41.02 mm (1.615 in)
Inner
Wear limit 38.8 mm (1.499 in)
Nominal (new) 45.45 mm (1.789 in)
Valve spring free length
Outer
Wear limit 43 mm (1.693 in)
Nominal (new) 1.1 to 1.3 mm (.043 to .051 in)
Intake
Wear limit 1.6 mm (.063 in)
Nominal (new) 1.25 to 1.55 mm (.049 to .061 in)
Valve seat contact width
Exhaust
Wear limit 1.8 mm (.071 in)
smr2005-038 113
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