Hello, I have a fuel delivery issue with my 1972 Evinrude 50 h.p. She fires right up and runs strong, but after a few minutes of running she dies. The bulb is soft so I pump it up again and can hear the fuel filling the carbs. She will fire right up again and run a few minutes then die over and over again? I can pump the bulb while the motor is running to keep fuel going to the carbs and she will stay running.
History
I had a blown reed valve last season so I replaced both upper and lower reeds. I also did carb kits. Compression is 140 psi (top) and 145 psi (bottom)
What I have replaced with NEW parts... fuel line, bulb, fuel tank (new fuel), fuel pump, all lines to/from fuel pump and lines to carbs.
I replaced the fuel line that feeds fuel from the top carb to the bottom with a clear line and can see it sucking air after a 20 seconds or so of running. There is no fuel leaking from any lines or connections as well as the new fuel pump.
So my thoughts are, New fuel pump is bad? Something wrong with the exhaust vacuum from the crank case that makes the fuel pump pulsate to deliver fuel?
There is some water mixing with the gear oil so I will be replacing the seals, water pump etc.. Not sure if that would have anything to do with the fuel issue.
Any advice is appreciated!
History
I had a blown reed valve last season so I replaced both upper and lower reeds. I also did carb kits. Compression is 140 psi (top) and 145 psi (bottom)
What I have replaced with NEW parts... fuel line, bulb, fuel tank (new fuel), fuel pump, all lines to/from fuel pump and lines to carbs.
I replaced the fuel line that feeds fuel from the top carb to the bottom with a clear line and can see it sucking air after a 20 seconds or so of running. There is no fuel leaking from any lines or connections as well as the new fuel pump.
So my thoughts are, New fuel pump is bad? Something wrong with the exhaust vacuum from the crank case that makes the fuel pump pulsate to deliver fuel?
There is some water mixing with the gear oil so I will be replacing the seals, water pump etc.. Not sure if that would have anything to do with the fuel issue.
Any advice is appreciated!