Yamaha EF7000 - MAINTENANCE SPECIFICATIONS

7-4
SPEC
MAINTENANCE SPECIFICATIONS
Piston: mm (in)
Piston clearance 0.015–0.029 (0.0006–0.0011)
<Limit> 0.150 (0.0059)
Piston skirt “D” 84.977–84.998 (3.3456–3.3464)
<Limit> 84.900 (3.3425)
Measuring point “H” 10 (0.4)
Oversize 1st 85.25 (3.3563)
2nd 85.50 (3.3661)
Piston pin hole inside diameter 20.004–20.015 (0.7876–0.7880)
<Limit> 20.045 (0.7892)
Piston pin: mm (in)
Piston pin diameter 19.955–20.000 (0.7856–0.7874)
<Limit> 19.930 (0.7846)
Piston ring: mm (in)
Top ring
Type Barrel
Dimensions “B × T” 1.2 × 3.1 (0.0472 × 0.1220)
End gap 0.20–0.35 (0.008–0.014)
<Limit> 0.6 (0.0236)
Side clearance 0.04–0.08 (0.0016–0.0031)
<Limit> 0.13 (0.0051)
2nd ring
Type Taper
Dimensions “B × T” 1.2 × 3.2 (0.0472 × 0.1260)
End gap 0.30–0.45 (0.0118–0.0177)
<Limit> 0.8 (0.0315)
Side clearance 0.03–0.07 (0.0012–0.0028)
<Limit> 0.13 (0.0051)
Oil ring
Type 3-piece type
Dimensions “B × T” 2.5 × 2.5 (0.0984 × 0.0984)
End gap 0.20–0.70 (0.008–0.028)
Cylinder head: mm (in)
Warpage limit 0.1 (0.0039)
Cylinder: mm (in)
Inside diameter “D” 85.000–85.020 (3.3465–3.3472)
<Limit> 85.020 (3.3472)
Taper limit 0.05 (0.002)
Warpage limit 0.05 (0.002)
MAINTENANCE SPECIFICATIONS
ENGINE
B
T