2003+ Suzuki DF9.9/DF15 four stroke outboard motors service manual, Page 113Get this manual

2003+ Suzuki DF9.9/DF15 four stroke outboard motors service manual, Page 113

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POWER UNIT
Valve seating contact width Measure the valve seating contact width as follows: 1 Coat the valve seat evenly with Prussian blue (or equivalent)2 Install the valve into the valve guide