2005 Yamaha 115 losing fuel pressure

[ScottyJ88]

I have a 186 seahunt triton CC. I am losing fuel pressure occasionally and the motor will bog down and often shut off. Usually I can pump the primer ball a few times and get it back running. I have changed the fuel lines from the pick up tube to the motor. Had fuel injectors professionally cleaned. Replaced the primer ball, low pressure fuel pump, electronic fuel pump, and fuel regulator. I also have good fuel pressure at the fuel rail. Usually when I put the boat in the water I can run to my destination with no problem. Its after the motor has been off, and cools down, then fired back up to return home is when im having issues. Im starting to wonder if it is a fuel venting issue. Please help! I'm about to throw in the towel on this one.

 

[99yam40]

have you tried pumping the primer bulb before restarting the motor to see if that keeps it from happening?

Does this motor have a fuel cooler?
if it does is it working properly?

 

[ScottyJ88]

have you tried pumping the primer bulb before restarting the motor to see if that keeps it from happening?

Does this motor have a fuel cooler?
if it does is it working properly?

I have to pump the primer ball after if bogs down because it is going flat. After a couple pumps it will get pressure and usually start up and run. Sometimes it will bog down multiple times sometimes it will only happen once and run fine the rest of my trip. There is no fuel cooler that I am aware of

 

[99yam40]

so apparently you have not tried pumping the primer bulb before restarting to see if that helps.
try it and get back to us.

also if the bulb is being sucked flat, you have a restriction

 

[ScottyJ88]

so apparently you have not tried pumping the primer bulb before restarting to see if that helps.
try it and get back to us.

also if the bulb is being sucked flat, you have a restriction

I have to pump the primer bulb before restarting or it won't turn over.

 

[99yam40]

lack of fuel will not prevent the starter from turning the motor over
you said the motor runs fine until you shut it down and let it cool off.
pump the bulb before trying to start it up again.

and how can you pump the bulb if the bulb is flat/