I have spent hours and hours researching and troubleshooting this issue. I a tried a couple of forums and recieved some good advice but I am still having the problem. I have '98 Mercruiser 4.3 LX Gen + (Carb) engine.
I cannot get the fuel pump to run while the engine is cranking. If I jump the fuel pump with 12V it will run. I can then start the boat and it will run fine. A week or two later and I have to do it again.
I found that the fuel pump post on the solenoid was only putting out 8 volts. I changed the solenoid on the starter and it jumped to 9. Not enough for the fuel pump to start. It becch tests at 10. I took the soleoind off and bech tested it. It was putting out 11.28V.
The new starter is only putting out 8 volts. It bech tests at 9v.
I am not sure what else to do. I already started to throw money at it (starter). I am thinking of replacing the battery cables tomorrow. Maybe fuel pump next week???
What voltage should the fuel pump be able to run on? Any other ideas?
This is a quick list of what I have done...
Charged the battery
Cleaned the wire terminals
Had starter tested
Had starter tested again - replaced solenoid
Had battery tested
Had battery tested again
Tried another battery
Tried it with jumper cables.
Bypassed the oil sensor
I bought a new starter (cheap one)
I used jumper cables and connected a second battery directly to the starter.
Bunch of other stuff
I cannot get the fuel pump to run while the engine is cranking. If I jump the fuel pump with 12V it will run. I can then start the boat and it will run fine. A week or two later and I have to do it again.
I found that the fuel pump post on the solenoid was only putting out 8 volts. I changed the solenoid on the starter and it jumped to 9. Not enough for the fuel pump to start. It becch tests at 10. I took the soleoind off and bech tested it. It was putting out 11.28V.
The new starter is only putting out 8 volts. It bech tests at 9v.
I am not sure what else to do. I already started to throw money at it (starter). I am thinking of replacing the battery cables tomorrow. Maybe fuel pump next week???
What voltage should the fuel pump be able to run on? Any other ideas?
This is a quick list of what I have done...
Charged the battery
Cleaned the wire terminals
Had starter tested
Had starter tested again - replaced solenoid
Had battery tested
Had battery tested again
Tried another battery
Tried it with jumper cables.
Bypassed the oil sensor
I bought a new starter (cheap one)
I used jumper cables and connected a second battery directly to the starter.
Bunch of other stuff