4.3 LX Fuel Pump
 

Does anyone know if the electric fuel pump on the 4.3LX should come on with the key in the on position?

Re: 4.3 LX Fuel Pump
 

It should come on. Mine does!

Re: 4.3 LX Fuel Pump
 

Thanks for the answer. My boat is extremely hard to start when it hasn't run for a few days. My fuel pump doesn't come on at all it seems. The pump still works, I was able to get it to run by connecting it directly to the battery. I'm guessing I have a bad connection or ground going to the fuel pump. Once I get the motor running it runs like a charm and doesn't have any problem being restarted....

Re: 4.3 LX Fuel Pump
 

Have you checked the breaker by the motor? I just read about someone having a short between that breaker and the pump. They said it was rubbing on the manifold. Good Luck!

Re: 4.3 LX Fuel Pump
 

I don't know a lot about the 4.3LX engine so bear with me. I am assuming that you have an electric fuel pump. Some engines with an electric fuel pump have an oil pressure sensor with a relay that turns on the electric fuel pump when the engine turns over (producing oil pressure and activating the pump) , and some do not. If your engine has this pressure sensor safety feature it would not pump fuel just because the key is on. Hope this helps

Happy Boating
Dan

Re: 4.3 LX Fuel Pump
 

The breaker has not been tripped. I'll have to check and see if I have the oil pressure switch as well.

Re: 4.3 LX Fuel Pump
 

My 4.3 electric fuel pump doesnt turn on until it senses oil pressure. My guess would be to check the choke to see if its working properly since youre dealing with a cold start issue.

Re: 4.3 LX Fuel Pump
 

I've checked the choke. It's staying closed when trying to start. When I pump the throttle I don't see any fuel squirting into the carb...

Re: 4.3 LX Fuel Pump
 

I read on another forum that there is another hot wire that goes from the starter solenoid to the fuel pump that turns on the pump momentarily when the starter is engaged to help prime the carb. I can't remember the the forum though. I found it by googling "does the 4.3lx have a fuel pump relay". Sounds like you might need to find an engine wiring diagram that shows this part of your system.

Happy Boating
Dan

Re: 4.3 LX Fuel Pump
 

Just had the exact same problem, took hoses off and jumpered out relay pump. Pump seemed to struggle pumping would only run for a few seconds. Kept trying and all of a sudden a splurt of gas came out of hose and everything works fine now, suspect something may have got caught in fuel pump (but not sure). Pump sounds good now, my pump does not come on until the engine turns over must be connected to starting sytem.