Yamaha 150A, Service Manual

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2-7
SPEC
E
MAINTENANCE SPECIFICATIONS
MAINTENANCE SPECIFICATIONS 2
POWER UNIT
Item Unit
Model
150 hp 175 hp 200 hp 225 hp
CYLINDER HEADS
Warpage limit mm (in) 0.10 (0.004)
(lines indicate straightedge
position)
CYLINDERS
Bore size mm (in) 90.00 - 90.02 (3.543 - 3.544)
Wear limit mm (in) 90.1 (3.55)
Taper limit mm (in) 0.08 (0.003)
Out-of-round limit mm (in) 0.05 (0.002)
PISTONS
Piston diameter (D) mm (in) 89.895 - 89.915 (3.5392 - 3.5400)
Measuring point (H) mm (in) 10 (0.4)
Piston-to-cylinder clearance mm (in) 0.100 - 0.106 (0.0039 - 0.0042)
<Limit> mm (in) 0.156 (0.0061)
Oversize piston diameter
1st mm (in) 90.15 (3.549)
2nd mm (in) 90.40 (3.559)
PISTON RINGS
Type Keystone
(B) mm (in) 2.0 (0.079)
(T) mm (in) 2.8 (0.110)
End gap (installed) mm (in) 0.30 - 0.40 (0.012 - 0.016)
<Limit> mm (in) 0.60 (0.024)
Side clearance mm (in) 0.02 - 0.06 (0.001 - 0.002)
CRANKSHAFT
Runout limit mm (in) 0.05 (0.002)
CONNECTING RODS
Small-end axial
play (F) mm (in) 0.12 - 0.26 (0.005 - 0.010)
Big-end side
clearance (E) mm (in) 2.0 (0.08)