Maintenance Specifications; Engine - Yamaha 40V Service Manual

SPEC

MAINTENANCE SPECIFICATIONS

ENGINE

Item
CYLINDER HEAD:
Warpage limit
CYLINDER:
Bore size
Wear limit
Taper limi
Out of round limit
PISTON:
Identification mark
Piston clearance
Limit
Diameter D
Measuring point H
Pin boss inside diameter
Ring groove clearance (installed)
Over size piston
Diameter
PISTON PIN:
Diameter
PISTON RING (1st):
Type
Dimensions (B × T)
End gap (installed)
Limit
PISTON RING (2nd):
Type
Dimensions (B × T)
End gap (installed)
Limit
CONNECTING ROD:
Small end diameter
CRANK SHAFT ASSEMBLY:
Crank width A
Crank width B
Runout limit D
Big end side clearance E
Small end axial play limit F
*1: Except for U.S.A.
MAINTENANCE SPECIFICATIONS
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
top mm (in)
2nd mm (in)
mm (in)
1
1st* mm (in)
2nd 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)
Unit
40 hp
67.00 ~ 67.02 (2.638 ~ 2.639)
0.060 ~ 0.065 (0.0024 ~ 0.0026)
66.940 ~ 67.000 (2.6354 ~ 2.6378)
18.008 ~ 18.015 (0.7090 ~ 0.7093)
mm (in)
0.04 ~ 0.08 (0.002 ~ 0.003)
0.03 ~ 0.07 (0.001 ~ 0.003)
17.995 ~ 18.000 (0.7085 ~ 0.7087)
0.40 ~ 0.60 (0.016 ~ 0.024)
0.40 ~ 0.60 (0.016 ~ 0.024)
22.005 ~ 22.008 (0.8663 ~ 0.8665)
53.90 ~ 53.95 (2.122 ~ 2.124)
32.88 ~ 33.10 (1.294 ~ 1.303)
0.20 ~ 0.70 (0.008 ~ 0.028)
2-7
Model
50 hp
0.1 (0.004)
67.10 (2.642)
0.08 (0.003)
0.05 (0.002)
W
0.115 (0.0045)
10 (0.4)
67.25 (2.648)
67.50 (2.657)
Keystone
2.0 × 2.6 (0.08 × 0.10)
0.80 (0.031)
Keystone
2.0 × 2.6 (0.08 × 0.10)
0.80 (0.031)
0.03 (0.001)
2.0 (0.08)
E