Johnson Evinrude Outboard Motors 1956-1970 1.5-40hp repair manual., Page 99Get this manual
TROUBLESHOOTING Next, drill the appropriate size hole for suitable fitting to pickup the cylinder vacuumInstall the cover plate with the fi tting in placeMount the fuel pump in convenient location, and then connect the vacuum hosePlug the hole in the intake manifold just below the carburetorPurchase regular fuel tankBecause the new system will only have one hose, new quick-disconnect fi tting must also be purchased and and connected to the engineTROUBLESHOOTING Observe the stamped markings on the pressure-type fuel tank adjacent to each fi tting; one for air and the other for fuelAlso, observe the rib on one hose running the full length from the tank to the engineThis rib will help to identify the same hose at the tank and the engineWith the fuel tank fill cap securely closed, insert screwdriver into the fuel line quick-disconnect at the engine to hold the check valve openNow, work the primer pump on the fuel tank and fuel should squirt out the quick-disconnect because the screwdr iver is holding the check valve openIf fuel is not present at the fitting, the pressure fuel tank primer pump or the check valve in the fuel pickup at the bottom of the fuel tank may be defectiveIf the engine runs for short periods and then shuts down from lack of fuel, the problem may be lack of air pressure in the tankTo check for air pressure, after the engine has run for just short period, open the fill cap very slightlyA hissing sound