1981 Johnson/Evinrude 4HP Outboards Service Manual, Page 21Get this manual
TROUBLE ISOLATION CHART PROBLEM: STEP ENGINE MALFUNCTION DUE TO FUEL SYSTEM PROCEDURE RESULT
Fuel OKGo to step 2Check Fuel Supply Is there fuel in tank? Is the fuel mixture correct? Is the fuel fresh? Is the fuel tank clean inside? Is the vent screw open? Fuel questionableDrain and fill tank with correct mixtureSee page 2-6
INo fuel or old fuelwrong mixture 2Dirt, varnish, water