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Old September 7th, 2007, 09:20 AM
Noodle68 Noodle68 is offline
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Default '75 evinrude 70 hp - fuel pump air filter

recently replaced the upper shift rod pin. In the process i replaced all of the fuel lines. i also added a new fuel line primer bulb w/ disconnect at each end. The previous owner had run the fuel lines connected directly to the gas tank. I removed the air filter (kind of looks like a stethescope) from the fuel pump to get the fuel line back together. when i put it back together it appears fuel leaks (squirts) from the air filter when i squeeze the primer bulb. all other connections appear to be good. the engine tries to fire but will quit immediately when i stop pushing the key in. starved for fuel? is there a gasket that should be replaced? is this a just a matter of sealant??
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Old September 7th, 2007, 10:08 AM
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tashasdaddy tashasdaddy is offline
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Default Re: '75 evinrude 70 hp - fuel pump air filter

pushing the key in chokes the motor, enrichening the fuel mix. you have a fuel delivery problem, not getting enough gas, either dirty carbs, or air leak in fuel line, or restriction in fuel line.
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Old September 7th, 2007, 10:21 AM
F_R F_R is offline
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Default Re: '75 evinrude 70 hp - fuel pump air filter

The "stethescope" fuel filter cover may be cracked (fairly common), or it may just need a new gasket. Whichever the case, if it is leaking under priming pressure, it is also leaking under suction as the pump attempts to draw fuel from the tank. So, if it is sucking air instead of gas, the motor will quit as soon as the fuel in the carburetor is consumed.

However, you indicate a second problem. It quits as soon as you stop choking it. It is unlikely that the carb is already empty, though it could be if you stopped squeezing the primer because of the leak. What I am getting at is if the carb has fuel in it and still requires continual choking, then it is obstructed (dirty) somewhere.
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Old September 13th, 2007, 02:46 PM
Noodle68 Noodle68 is offline
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Default Re: '75 evinrude 70 hp - fuel pump air filter

Thanks! that answers my question perfectly! I will pursue a gasket or possibly a new fuel filter cover first and try to eliminate the leak under prime (at least) and be satisfied i am getting fuel to the carb!
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