1990 Johnson Evinrude "ES" 40 thru 55, P/N 507872, Page 335Get this manual
Gasoline! Handle With Care Gasoline vapor and air mixtures explode easily and violently when mixed as shown Part Gasoline
When you smell ANY odor of gasoline, explosion is possible
20 Parts Air
By Volume
Gasoline fumes are heavy and wi" sink to the lowest point in the boat or room and wi" Stay there Waiting