BOMBARDIER Johnson 90 Service Manual page 16

GENERAL INFORMATION
SERVICE DATA - 90/115
ltem Unlt
Data
90 115
VALVE/VALVE GUIDE
Valva diameter
IN
mm {in) 33 (1.3)
EX mm {in)
28 (1.1)
Tappet clearance
IN
STD mm {in)
0.23 - 0.27 (0.009 - 0.011)
(cold engine condition)
EX STD mm (in)
0.23 - 0.27 (0.009 - 0.011)
Valva seat angla
IN
degree 15º, 45º, 60º
EX
degree
15º, 45°
Valva guida to valva STD mm (in) 0.020 - 0.047 (0.0008 - 0.0019)
stem clearance
IN
Limit mm(in)
0.070 (0.0028)
STD mm (in) 0.045-0.072 (0.0018- 0.0028)
EX
Limit mm (in) 0.090 (0.0035)
Valve guida inside
IN,EX
STD mm (in) 6.000 - 6.012 (0.2362 - 0.2367)
diameter
Valva guida protrusion
IN,EX
STD mm(in)
13.5 (0.53)
Valva stem outside IN STD mm(in) 5.965 - 5.980 (0.2348 - 0.2354)
diameter
EX STD mm (in) 5.940 - 5.955 (0.2339 - 0.2334)
Valva stem end
IN
Llmit mm(in) 0.14 (0.006)
dellectlon
EX Llmit mm(in) 0.18 (0.007)
Valva stem runout IN,EX Limit mm(in) 0.05 (0.002)
Valve head radial
IN,EX
Limlt mm(in) 0.08 (0.003)
runout
Valve head thickness STD
mm (in) 1.0 (0.04)
IN
Limit mm (in) 0.7 (0.03)
STD mm (in) 1.20 (O.OS)
EX
Limit mm(in) 0.7 (0.03)
Valve seat contact IN STD mm (in) 1.1 - 1.3 (0.04 - 0.05)
width
EX STD mm (in) 1.1 - 1.3 (0.04 - 0.05)
Valva spring free length STD
mm(in)
42.7 (1.68)
Limit
mm (in)
41.0 (1.61)
Valva spring tension STD N (kg, lb) 167 - 193 (16.7 - 19.3, 36.8 - 42.5) for 32.6 mm (1.28 in)
Limit N (kg, lb) 151 (15.1, 33.3) for 32.6 mm (1.28 in)
Valva spring squareness Limit mm(in) 2.0 (0.08)
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