Reply To: 1956 Evinrude fleetwin 7.5 HP

[David Stanton]

How do you know the tank and fuel line connector are good? Will those motors stay running if you keep pumping the primer on the tank? The primer actually pumps gas directly and does not build any pressure in the tank, while the motor is dependent on pressure build up in the tank from the motor to stay running, and that comes back to the tank on the 2nd line once the motor starts. When the motor quits, if you loosen the tank cap can you hear pressure bleeding off?

You may have an air leak in one line or the other – most common place is the gas line connector where the internal O-rings get hard with age and don’t seal…or the tank diaphragm and /or gasket may leak.
Dave