Ski-Doo FORMULA III, Shop Manual

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Section 10 TECHNICAL DATA
Sub-Section 02 (ENGINES)
10-02-2
VEHICLE MODEL SUMMIT
670
FORMULA
Z
FORMULA
SS
FORMULA
III / III LT
MACH Z /
Z LT
ENGINE TYPE 670 HAC 583 670 599 779
Number of Cylinders 2 2 2 3 3
Bore mm
(in)
78.00
(3.071)
76.00
(2.992)
78.00
(3.071)
64.50
(2.539)
69.50
(2.736)
Stroke mm
(in)
70.00
(2.760)
64.00
(2.520)
70.00
(2.760)
61.00
(2.402)
68.00
(2.680)
Displacement cm 3
(in 3 )
668.97
(40.82) 580.70
(35.44) 668.97
(40.82) 597.94
(36.49) 773.90
(47.23)
Compression Ratio (corrected) 6.20 6.10 6.20 6.80 6.80
Maximum Power Engine Speed
➀
RPM 7600 – 7800 7800 – 8000 7600 – 7800 8100 – 8300 8100 – 8300
Piston Ring Type 1 st / 2 nd ST / R ST / N.A. ST / R ST / R ST / R
Ring End Gap
(new)
(wear limit)
mm
(in)
mm
(in)
0.250
(.0098)
1.000
(.0394)
0.250
(.0100)
1.000
(.0400)
0.250
(.0100)
1.000
(.0400)
0.200
(.0079)
1.000
(.0394)
0.200
(.0079)
1.000
(.0394)
Ring / Piston Groove Clearance
(new)
(wear limit)
mm
(in)
mm
(in)
0.030
(.0012)
0.200
(.0079)
0.040
(.0016)
0.200
(.0080)
0.030
(.0012)
0.200
(.0080)
0.030
(.0012)
0.200
(.0079)
0.030
(.0012)
0.200
(.0079)
Piston / Cylinder Wall Clearance
(new)
(wear limit)
mm
(in)
mm
(in)
0.070
(.0028)
0.150
(.0059)
0.050
(.0020)
0.150
(.0060)
0.070
(.0028)
0.150
(.0060)
0.085
(.0035)
0.200
(.0079)
0.120
(.0048)
0.200
(.0079)
Connecting Rod Big End Axial Play
(new)
(wear limit)
mm
(in)
mm
(in)
0.390
(.0154)
1.200
(.0472)
0.390
(.0156)
1.200
(.0480)
0.390
(.0156)
1.200
(.0480)
0.390
(.0154)
1.200
(.0472)
0.390
(.0154)
1.200
(.0472)
Maximum Crankshaft End-play mm
(in)
0.300
(.0118)
0.300
(.0120)
0.300
(.0120)
0.300
(.0118)
0.300
(.0118)
Maximum Crankshaft Deflection mm
(in)
0.080
(.0031)
0.080
(.0032)
0.080
(.0032)
0.080
(.0031)
0.080
(.0031)
Rotary Valve Timing
➁
and P / N 420 924 XXX Opening
Closing
144° – 72°
500
140° – 71°
502
144° – 72°
500
N.A. N.A.
Magneto Generator Output W 220 220 220 220 220
Ignition Type CDI CDI CDI CDI CDI
Spark Plug Make and Type NGK BR9ES NGK BR9ES NGK BR9ES NGK BR10ES NGK BR10ES
Spark Plug Gap mm
(in)
0.45
(.018)
0.45
(.018)
0.45
(.018)
0.45
(.018)
0.45
(.018)
Ignition Timing BTDC
➂
mm
(in)
1.93
(.076)
1.75
(.069)
1.93
(.076)
2.18
(.086)
2.11
(.083)
Generating Coil
➄
Low Speed :
Ω
10 – 17 10 – 17 10 – 17 49 – 75 49 – 75
High Speed :
Ω
N.A. N.A. N.A. 2.8 – 4.3 2.8 – 4.3
Lighting Coil
➄
Ω
0.20 – 0.35 0.20 – 0.35 0.20 – 0.35 0.20 – 0.35 0.20 – 0.35
High Tension Coil
➄
Primary
Ω
0.3 – 0.7 0.3 – 0.7 0.3 – 0.7 0.2 – 0.5 0.2 – 0.5
Secondary k
Ω
8 – 16 8 – 16 8 – 16 6 – 13 6 – 13
Carburetor Type
PTO / CENTER/ MAG VM 40 81 / 82 VM 38 325 / 326 VM 40 79 / 79
VM 36 172 / VM 36-
173 / VM 36-174
TM 38-C152
Main Jet PTO / CENTER/ MAG 380 / 370 320 / 330 360 / 360 330 / 320 / 330 380 / 370 / 380
Needle Jet 224 AA-2 480 P-0 224 AA-3 286 P-0 327 O-4
Pilot Jet 75 40 50 50 / 55 / 50 40 / 45 / 45
Needle Identification
– Clip Position
7DPI1-3 6DHN44-3 7EDY1-3 6DEY2-3 8AGY1-41-3
Slide Cut-away 2.5 2.5 2.5 2.5 2.0
Float Adjustment ± 1 mm
(± 0.40 in)
19.6
(.77) 18.1
(.71) 18.1
(.71) 18.1
(.713)
20.0
(.787)
Air Screw Adjustment ± 1/16 Turn 2.25 1.5 2.25 1.5 / 1.5 / 1.5 4.5 / 4.0 / 3.5
Idle Speed RPM RPM 1800 – 2000 1800 – 2000 1800 – 2000 1800 – 2000 1700 – 1800
Gas Type / Pump Octane number Unleaded /
87
Unleaded /
87
Unleaded /
87
Unleaded /
87
Unleaded /
87
Gas / Oil Ratio Injection Injection Injection Injection Injection
Type Liquid Liquid Liquid Liquid Liquid
Axial Fan Belt Adjustment Deflection mm
in
N.A. N.A. N.A. N.A. N.A.
Force kg (lbf) N.A. N.A. N.A. N.A. N.A.
Thermostat Opening Temperature °C (°F) 42 (108) 42 (108) 42 (108) 42 (108) 42 (108)
Radiator Cap Opening Pressure kPa
(PSI)
90.0 (13.0) 90.0 (13.0) 90.0 (13.0) 90.0 (13.0) 90.0 (13.0)
EN
G
IN
E
C
O
LD
N
•m
(l
b
•ft)
Drive Pulley Retaining Screw Ð Ð Ð Ð «
Exhaust Manifold Nuts or Bolts 10 (7) 23 (17) 23 (17) 10 (7) 25 (18)
Magneto Ring Nut 125 (92) 125 (92) 125 (92) 125 (92) 125 (92)
Crankcase Nuts or Screws M6
M8 10 (7)
24 (18)
9 (6.5)
29 (21)
9 (6.5)
29 (21)
13 (9)
29 (21)
13 (9)
29 (22)
Crankcase / Engine Support Nuts or Screws 38 (28) 40 (29) 40 (29) 13 (9) 13 (9)
Cylinder Head Nuts 30 (22) 29 (21) 29 (21) 29 (21) 29 (21)
Crankcase / Cylinder Nuts or Screws 30 (22) 29 (21) 29 (21) 29 (21) 29 (21)
Axial Fan Shaft Nut N.A. N.A. N.A. N.A. N.A.