The spark plug should be gaped at .030"(76mm)
A Champion CJ8Y or J19LM will perform fine
0.030" for a champion or 0.020" for NGK and others.
Depending on the model, it could differ, but the most common would be the champion CJ8 spark plug, or similar, double check at your parts store before you buy.
1ml
SAE 30
Run the car good
spark plug gap, gas/air mixture on carb.
All the small Briggs engines seem to have a points gap of 0.02 inches
any where from 120 lbs to 180 lbs
According to my owners manuel the spark plug gap is 30
.035 spark .020 points