Tohatsu 4 Stroke MFS 2/2.5/3.5A Outboards Service Manual, Page 102Get this manual

Tohatsu 4 Stroke MFS 2/2.5/3.5A Outboards Service Manual, Page 102

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5 Use 45 degree cutter to adjust contact width of valve seat to specified value

b Width before correction
If valve seat contact area is narrow and is located nearer to valve face lo