BOMBARDIER Johnson 90 Service Manual page 17

GENERAL INFORMATION
SERVICE DATA - 90/115
Data
ltem Unlt
90
115
CYLINDER/PISTON/PISTON RING
Cylinder distortion Limit mm (in) 0.05 (0.002)
Piston to cylinder clearance STO
mm(in)
0.020 - 0.040 (0.0008 - 0.0016)
Limit mm (in)
0.100 (0.0039)
Cylinder bore
STO
mm (In) 84.000 - 84.020 (3.3071 - 3.3079)
Cylinder measuring position
mm (in)
50 (2.0) from cylinder top surface
Piston skirt diameter STO
mm(in)
83.970 - 83.990 (3.3059 - 3.3067)
Piston measuring position mm(in) 26.5 (1.04) from piston skirt end
Cylinder bore wear
Limit mm(in)
0.100 (0.0039)
Piston ring end gap STO mm (in) 0.20- 0.35 (0.008 - 0.014)
1st
Limit mm (in) 0.70 (0.028)
STO mm (in) 0.35-0.50 (0.014-0.020)
2nd
Limít mm (in) 1.00 (0.039)
Piston ring free end STO
mm (In) Approx. 11.3 (0.44)
gap
1st
Limit mm (in) 9.0 (0.354)
STO
mm (in) Approx. 11.0 (0.43)
2nd
Limit mm (in)
8.8 (0.347)
Piston ring to groove
STO mm (in) 0.030 - 0.070 (0.0012 - 0.0028)
clearance
1st
limít mm (in) 0.12 (0.005)
STO
mm (in) 0.020 - 0.060 (0.0008 - 0.0024)
2nd
Llmit mm(in) 0.10 (0.004)
Piston ring groove
1st
STO
mm (in) 1.22 - 1.24 (0.048 - 0.049)
width
2nd
STO
mm (in) 1.51 - 1.53 (0.059 - 0.060)
Oil
STO
mm (in) 2.51 - 2.53 (0.099 - 0.100)
Piston ring thickness
1st
STO
mm(in) 1.17 - 1.19 (0.046 - 0.047)
2nd
STD
mm (in) 1.47 - 1.49 (0.058 - 0.059)
Pin clearance in piston pin hole STO mm(in) 0.006 - 0.017 (0.0002 - 0.0007)
Limit mm (in) 0.040 (0.0016)
Piston pin outside diameter STO
mm(in) 20.997 - 21.000 (0.8267 -
0.8268)
Limit mm(in) 20.980 (0.8260)
Piston pin hole diameter STO
mm(in) 21.006 - 21.014 (0.8270 - 0.8273)
Limít mm (in) 21.040 (0.8283)
Piston clearance in conrod small STO mm (in) 0.003- 0.014 (0.0001 - 0.0006)
end
Limit
mm(in)
0.050 (0.0020)
Conrod small end bore STO mm(in) 21.003 - 21.011 (0.8269 - 0.8272)
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