Yamaha Outboard F15A F9.9C, FT9.9D F15 Service Manual, Page 250Get this manual

Yamaha Outboard F15A F9.9C, FT9.9D F15 Service Manual, Page 250

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OIL FILTER, THERMOSTAT AND EXHAUST COVER
Measuring steps: Suspend the thermostat in container filled with water8 Slowly heat the water8 Place thermometer in the water8 While stirring the water,