How do you set valve clearance on 3hp Briggs and stratton side valve?

Remove cylinder head,

Remove valve side cover,

Remove valve springs to free valves,

Measure gap between end of valve and cam follower, while pushing valve onto seat with finger,

To make gap larger, pull valve out and grind some metal from end with bench grinder, (carefull here),

When gap is correct and valve seats without turning under finger,

Reassemble.