Maintenance Specifications; Piston Rings - YAMAHA Marine F4A Manual De Servicio

SPEC
Item
Stem outside diameter
Intake
Exhaust
Guide inside diameter
Stem to guide clearance
Intake
Exhaust
Stem runout limit
VALVE SPRING
Free length
Free length limit
Set length
Tilt limit
PISTON
Piston-to-cylinder clearance
Piston diameter (D)
Standard
Measuring point (H)
Pin boss inside diameter
Oversize piston diameter
1st*
2nd
PISTON PIN
Outside diameter

PISTON RINGS

Top ring
Type
Dimensions (BxT)
End gap (installed)
Wear limit
Side clearance (installed)
2nd ring
Type
Dimensions (BxT)
End gap (installed)
Ware limit
Side clearance (installed)

MAINTENANCE SPECIFICATIONS

Unit
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm/kg (in/lb)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
5.475~5.490 (0.2156~0.2161)
5.460~5.475 (0.2150~0.2156)
5.500~5.512 (0.2165~0.2170)
0.010~0.037 (0.0004~0.0015)
0.025~0.052 (0.0010~0.0020)
0.03 (0.0012)
21.6/7.2 (0.85/15.87)
0.035~0.065 (0.0014~0.0026)
58.950~58.965 (2.3209~2.3215)
13.009~13.017 (0.5122~0.5125)
59.25 (2.333)*
59.50 (2.343)
12.995~13.000 (0.5116~0.5118)
1.5 x 2.6 (0.06 x 0.10)
010~020 (0.004~0.008)
0.40 (0.016)
0.04~0.08 (0.002~0.003)
1.5 x 2.6 (0.06 x 0.10)
0.25~0.40 (0.010~0.016)
0.60 (0.024)
0.02~0.06 (0.001~0.002)
2-4
Model
F4A/F4
35.0 (1.38)
34.0 (1.34)
1.2 (0.05)
10 (0.39)
1 Except for USA
Plain
Plain