2000-2005 Yamaha F40B Outboard Service Manual, Page 238Get this manual

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IpOWRI 411: CYLINDER HEAD Valve seat cutter set YM-91043-C90890-06803 Cut section as follows Section

45 cutter

Valve seat is too narrow and is near valve marginDesired result

• • TGB
  • Arctic Cat
  • Bombardier
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  • Honda
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• • Kawasaki
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  • Honda
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  • Mercury
  • Suzuki
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  • Yamaha
• • Honda
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  • Yamaha
• • Arctic Cat
  • Polaris
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• • Chrysler
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