Suzuki 2002-2005 DF4/DF5/DF6 4-Stroke Outboards Service Manual, Page 83Get this manual
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6-16 POWER UNIT VALVE SEAT SERVICING If the valve seat contact width is out of the specification, reface the valve seat as follows: Valve seat angleIN EX 09916-20620 09916-20610 09916-24440 09916-2445