Ski-Doo Formula 500 1998, Shop Manual

Page: 343 / 398

Section 10 TECHNICAL DATA
Subsection 02 (ENGINES)
10-02-4
VEHICLE MODEL
GRAND TOURING
500
GRAND TOURING
583
SKANDIC WT SKANDIC SWT
ENGINE TYPE 494 583 503 503
Number of Cylinders 2 2 2 2
Bore mm (in) 69.5 (2.736) 76.0 (2.992) 72.0 (2.835) 72.0 (2.835)
Stroke mm (in) 65.8 (2.59) 64.0 (2.52) 61.0 (2.402) 61.0 (2.402)
Displacement cm 3 (in 3 ) 499.3 (30.47) 580.7 (35.44) 496.7 (30.31) 496.7 (30.31)
Compression Ratio (corrected) 6.8 6.7 6.2 6.2
Maximum Power Engine Speed
➀
± 100 RPM 7800 7900 6800 6500
Piston Ring Type 1 st /2 nd ST/R ST/N.A. ST/R ST/R
Ring End Gap
New
Wear Limit mm (in)
mm (in) 0.25 (.010)
1.0 (.039)
0.25 (.010)
1.0 (.039)
0.2 (.0079)
1.0 (.039)
0.2 (.0079)
1.0 (.039)
Ring/Piston Groove Clearance
New
Wear Limit mm (in)
mm (in) 0.04 (.0016)
0.2 (.0079)
0.04 (.0016)
0.2 (.0079)
0.04 (.0016)
0.2 (.0079)
0.04 (.0016)
0.2 (.0079)
Piston/Cylinder Wall Clearance
New
Wear Limit mm (in)
mm (in) 0.11 (.0043)
0.15 (.0059) 0.11 (.0045)
0.15 (.0059) 0.9 (.0035)
0.2 (.0079) 0.9 (.0035)
0.2 (.0079)
Connecting Rod Big End Axial Play
New
Wear Limit mm (in)
mm (in) 0.39 (.0154)
1.2 (.0472)
0.39 (.0154)
1.2 (.0472)
0.2 (.0079)
1.0 (.0394) 0.2 (.0079)
1.0 (.0394)
Maximum Crankshaft End-play
➁
mm (in) 0.3 (.012) 0.3 (.012) 0.3 (.012) 0.3 (.012)
Maximum Crankshaft Deflection mm (in) 0.08 (.0031) 0.08 (.0031) 0.08 (.0031) 0.08 (.0031)
Rotary Valve Timing
➂
and P/N 420 924 XXX
Opening
Closing
135° – 64°
509
140° – 71°
502
N.A. N.A.
Magneto Generator Output W 220 220 240 240
Ignition Type CDI CDI CDI CDI
Spark Plug Make and Type NGK BR9ES NGK BR9ES NGK BR9ES NGK BR8ES
Spark Plug Gap mm (in) 0.45 (.018) 0.45 (.018) 0.45 (.018) 0.45 (.018)
Ignition Timing BTDC
➃
mm (in) 1.81 (.071) 1.75 (.069) 1.66 (.065) 1.66 (.065)
Trigger Coil
➄
Ω
190 – 300 190 – 300 140 – 180 140 – 180
Generating Coil
➄
Ω
10 – 17 10 – 17 230 – 330 230 – 330
Lighting Coil
➄
Ω
0.20 – 0.35 0.20 – 0.35 0.23 – 0.28 0.23 – 0.28
High Tension Coil
➄
Primary
Ω
0.3 – 0.7 0.3 – 0.7 N.A. N.A.
Secondary k
Ω
8 – 16 8 – 16 5.1 – 6.3 5.1 – 6.3
Carburetor Type PTO/MAG VM 38 382/383 VM 38 386/387 2 x VM 34 VM 32
Main Jet PTO/MAG 320/290 270/260 210 230
Needle Jet 480-Q3 480-P7 159 P4 159 O-0
Pilot Jet 50 50 40 25
Needle Identification
— clip position
6DHY48-3 6DEY4-2 6DH2-3 6DH8-4
Slide Cut-away 2.5 2.5 2.5 3.0
Float Adjustment ± 1 mm (± .040 in) 18.1 (.71) 18.1 (.71) 36.5 (1.44) 23.9 (.94)
Air Screw Adjustment ± 1/16 Turn 1.25 2.0 1.0 1.5
Idle Speed ± 200 RPM 1800 1800 1900 1650
Gas Type/Pump Octane Number Unleaded/87 Unleaded/87 Unleaded/87 Unleaded/87
Gas/Oil Ratio Injection Injection Injection Injection
Type Liquid Liquid Axial Fan Axial Fan
Axial Fan Belt Adjustment
Deflection
➅
mm (in) N.A. N.A. 9 – 10 (.35 – .39) 9 – 10 (.35 – .39)
Force kg (lbf) N.A. N.A. 5 (11) 5 (11)
Thermostat Opening Temperature °C (°F) 42 (108) 42 (108) N.A. N.A.
Radiator Cap Opening Pressure kPa (PSI) 90 (13) 90 (13) N.A. N.A.
ENG
INE
C
O
LD
N•
m
(
lb
•ft
)
Drive Pulley Retaining Screw
➆ ➆ ➆ ➆
Exhaust Manifold Nuts or Bolts 23 (17) 23 (17) 22 (16) 22 (16)
Magneto Ring Nut 100 (74) 125 (92) 105 (77) 105 (77)
Crankcase Nuts or Screws
M6
M8 9 (6.5)
29 (21)
9 (6.5)
23 (17)
—
22 (16)
—
22 (16)
Crankcase/Engine Support Nuts or Screws 39 (29) 39 (29) 39 (29) 39 (29)
Cylinder Head Nuts 29 (21) 29 (21) 22 (16) 22 (16)
Crankcase/Cylinder Nuts or Screws 29 (21) 29 (21) N.A. N.A.
Axial Fan Shaft Nut N.A. N.A. 48 (35) 48 (35)