Almost all (if not all) B&S engines have a .030 plug gap.
0.020
.030
.30 thousands
0.030 is the gap for briggs and stratton 4.5 hp mower
30/1000's
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not getting fire 4.75 briggs statton lawn mower
What is the gap on the spark plug on a Brigg's stratton lawn mower Model#31P777 Type 0348E1?
take the old plug to a mower parts store & tell them you need a matching one for a push mower
You can set most plugs at .030 and be safe.
.32
A Champion CJ8Y or J19LM will perform fine