Maintenance Specifications - Yamaha 25J Manuel D'entretien

SPEC

MAINTENANCE SPECIFICATIONS

ENGINE
Item
CYLINDER HEAD
Warpage limit
CYLINDERS
Bore
Standard
Wear limit
Taper limit
Out-of-round limit
PISTONS
Piston-to-cylinder clearance
Piston diameter (D)
Measuring point (H)
Pin boss inside diameter
Piston ring groove clearance
(installed)
Top ring
2nd ring
Oversize piston diameter
1st
2nd
PISTON PINS
Diameter
PISTON RINGS
Top ring
Type
Dimensions (B × T)
End gap (installed)
2nd ring
Type
Dimensions (B × T)
End gap (installed)
CONNECTING RODS
Small end inside diameter
CRANKSHAFT
Crankshaft width (A)
Crankshaft width (B)
Crankshaft width (C)
Big end side clearance (E)
Maximum small end axial play
(F)
MAINTENANCE SPECIFICATIONS
Unit
mm (in)
mm (in) 59.50 ~ 59.52 (2.3425 ~ 2.3433)
mm (in)
mm (in)
mm (in)
mm (in) 0.040 ~ 0.045 (0.0016 ~ 0.0018)
mm (in) 59.455 ~ 59.480 (2.3407 ~ 2.3417)
mm (in)
mm (in) 15.974 ~ 15.985 (0.6289 ~ 0.6293)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in) 15.965 ~ 15.970 (0.6285 ~ 0.6287)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in) 20.004 ~ 20.007 (0.7876 ~ 0.7878)
mm (in) 49.90 ~ 49.95 (1.965 ~ 1.976)
mm (in)
mm (in)
mm (in)
mm (in)
2-5
Model(s)
25hp
0.1 (0.004)
59.6 (2.35)
0.08 (0.003)
0.05 (0.002)
10 (0.39)
0.05 ~ 0.09 (0.002 ~ 0.004)
0.05 ~ 0.09 (0.002 ~ 0.004)
59.75 (2.352)
60.00 (2.362)
Keystone
1.9 × 2.4 (0.07 × 0.09)
0.15 ~ 0.30 (0.006 ~ 0.012)
Keystone
1.9 × 2.4 (0.07 × 0.09)
0.15 ~ 0.30 (0.006 ~ 0.012)
128.6 ~ 129.0 (5.06 ~ 5.08)
207.5 ~ 208.1 (8.17 ~ 8.19)
0.20 ~ 0.70 (0.008 ~ 0.028)
2.0 (0.08)
E
30hp