Yamaha F100A Service Manual

2-4
SPEC
E
MAINTENANCE SPECIFICATIONS
Stem diameter
Intake mm (in) 5.975 ~ 5.990 (0.2352 ~ 0.2358)
Exhaust mm (in) 5.960 ~ 5.975 (0.2346 ~ 0.2352)
Guide inside diameter
Intake and exhaust mm (in) 6.005 ~ 6.018 (0.2364 ~ 0.2369)
Stem-to-guide clearance
Intake mm (in) 0.015 ~ 0.043 (0.0006 ~ 0.0017)
Exhaust mm (in) 0.030 ~ 0.058 (0.0012 ~ 0.0023)
Stem runout limit mm (in) 0.03 (0.001)
VALVE SPRINGS
Free length mm (in) 53.20 (2.094)
Minimum free length mm (in) 52.25 (2.057)
Tilt limit mm (in) 2.6 (0.10)
VALVE LIFTERS
Valve lifter outside diameter mm (in) 27.965 ~ 27.980 (1.1010 ~ 1.1016)
Valve-lifter-to-cylinder-head
clearance
mm (in) 0.020 ~ 0.056 (0.0008 ~ 0.0022)
VALVE PADS
Valve pad thickness
(in 0.025 mm increments)
mm (in) 2.000 ~ 3.300 (0.0787 ~ 0.1299)
PISTONS
Piston-to-cylinder clearance mm (in) 0.070 ~ 0.080 (0.0028 ~ 0.0031)
Measuring point (D) mm (in) 78.928 ~ 78.949 (3.1074 ~ 3.1082)
Measuring point (H) mm (in) 13 (0.51)
Pin boss inside
diameter
mm (in) 18.008 ~ 18.015 (0.7090 ~ 0.7093)
Oversize piston diameter mm (in) 79.25 (3.120)
PISTON PINS
Outside diameter mm (in) 17.997 ~ 18.000 (0.7085 ~ 0.7087)
PISTON RINGS
Top ring
Dimension B mm (in) 1.17 ~ 1.19 (0.046 ~ 0.047)
Dimension T mm (in) 2.89 ~ 2.91 (0.114 ~ 0.115)
End gap mm (in) 0.15 ~ 0.30 (0.006 ~ 0.012)
Side clearance mm (in) 0.02 ~ 0.08 (0.001 ~ 0.003)
2nd ring
Dimension B mm (in) 1.47 ~ 1.49 (0.058 ~ 0.059)
Dimension T mm (in) 3.00 ~ 3.20 (0.118 ~ 0.126)
End gap mm (in) 0.70 ~ 0.90 (0.028 ~ 0.035)
Side clearance mm (in) 0.03 ~ 0.07 (0.001 ~ 0.003)
Oil ring
Dimension B mm (in) 2.38 ~ 2.48 (0.094 ~ 0.098)
Dimension T mm (in) 2.40 (0.094)
End gap mm (in) 0.20 ~ 0.70 (0.008 ~ 0.028)
Side clearance mm (in) 0.03 ~ 0.15 (0.001 ~ 0.006)
Item Unit
Model
F100
H
D
T
B
T
B
B
T

Yamaha F100A Specifications

General

Brand	Yamaha
Model	F100A
Category	Outboard Motor
Language	English