Yamaha F40BMHD Service Manual
Also see for F40BED: Rigging guideOwner's manualService manualService manual
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Contents
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POWR5-31CYLINDER HEAD E3. Measure:• Valve seat widthOut of specification → Reface thevalve seat.CHECKING THE VALVE1. Check:• ValveDeformation → Replace.2. Measure:• Margin thicknessOut of specification → Replace.3. Measure:• Valve stem diameterOut of specification → Replace.4. Measure:• Valve stem run-outOut of specification → Replace.NOTE:The valve guide and valve stem seal shouldbe replaced when the valve is replaced.a Valve seat width0.9 - 1.1mm(0.035 - 0.043 in)aaaMargin thicknessIN 0.6 - 1.0 mm(0.024 - 0.039 in)EX 0.7 - 1.1 mm(0.028 - 0.043 in)Valve stem diameterIN 5.475 - 5.490 mm(0.2156 - 0.2161 in)EX 5.460 - 5.475 mm(0.2150 - 0.2155 in)aaStem run-out limitIN, EX 0.016 mm (0.0006 in) |
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