Re: pre59 pressurized tank?
I have the 1954 7.5 Evinrude so our motors are very similar. <br /><br />I just replaced the fuel lines on mine and concluded that when you hit the pump on the tank, no pressure builds up in the tank. Only puts fuel into the line and carb.<br /><br />Therefore, I think that if your engine runs with premix spray, you are having a fuel delivery problem but not the pump on the tank.<br /><br />Those engines operate on crankase pressure to pump fuel. Sounds to me like the tank is not being pressurized so no fuel is being pumped.<br /><br />I would get the motor running to see if there is any pressure coming out of the air hose by disconecting the air hose.<br /><br />To keep the engine running, I would mount a fuel take a couple of feet above the motor, hook up a fuel line to the fuel in. Gravity will feed the gas to the motor. I would then check the air line for pressure.<br /><br />If there is no pressure, then I don't know what to do but at least you know that is where the problem is.<br /><br />While writing this I just thought of a few other things:<br /><br />Could you have the air and fuel lines reversed (I've done it).<br /><br />Is there an air leek in the tank or hose?<br /><br />I just changed by lines to brand new ones and all of a sudden my motor is running much much better. I did nothing else.<br /><br />Let us know your results....<br /><br /><br />Joe
