Little Frustrated and running out of options
87 OMC Cobra 4.3 idles and runs great in the water; engage in gear and you have about 2-3 minute before it bogs down and quits. Almost impossible to get started for about 2-3 hrs, but them starts and runs fine (like nothing ever happened). If you do get it started right after it quits, it runs really rough and will not idle. The engine block is actually a '96 so we had to put an electric fuel pump on it.
Here is what I have done:
Rebuilt the carb 3 times - twice by myself and the last time by a professional
Checked the tank vent & check valve
New filters and Fuel Pump
Tested the fuel pressure line right before it goes into the carb and I have 2 - 3 lbs. even as it is dying.
I can see the spray in the carb from the accelerator pump when it first throttles up and the fuel 'misting' out into the two barrels while it runs.
Unhooked the line from the tank and just had the fuel pump suck out of a small gas can (91 octane Ethanol Free)
Test the coil right after it has died and the voltage is all the same as when it was running ( at least, key on/off, and cranking)
I have just about ruled out a fuel problem, so wondering if maybe I am only getting 'weak' spark after a couple of minutes. I can hear the ESA retard the engine when I put it in gear, but then I runs good for about 2-3 min. until it dies. Any suggestions? Can my points and condenser cause an issue like this? Any other electrical issues I am not thinking about? I appreciate any thoughts.
87 OMC Cobra 4.3 idles and runs great in the water; engage in gear and you have about 2-3 minute before it bogs down and quits. Almost impossible to get started for about 2-3 hrs, but them starts and runs fine (like nothing ever happened). If you do get it started right after it quits, it runs really rough and will not idle. The engine block is actually a '96 so we had to put an electric fuel pump on it.
Here is what I have done:
Rebuilt the carb 3 times - twice by myself and the last time by a professional
Checked the tank vent & check valve
New filters and Fuel Pump
Tested the fuel pressure line right before it goes into the carb and I have 2 - 3 lbs. even as it is dying.
I can see the spray in the carb from the accelerator pump when it first throttles up and the fuel 'misting' out into the two barrels while it runs.
Unhooked the line from the tank and just had the fuel pump suck out of a small gas can (91 octane Ethanol Free)
Test the coil right after it has died and the voltage is all the same as when it was running ( at least, key on/off, and cranking)
I have just about ruled out a fuel problem, so wondering if maybe I am only getting 'weak' spark after a couple of minutes. I can hear the ESA retard the engine when I put it in gear, but then I runs good for about 2-3 min. until it dies. Any suggestions? Can my points and condenser cause an issue like this? Any other electrical issues I am not thinking about? I appreciate any thoughts.