I have a 98 black max 150efi. My fuel pump at times will work fine then just quit. I replaced the pump and still have the same issues.
Can anyone give me direction to cause.
Thank you for your thoughts.
I’m not thinking it’s a fuel issue. I have a kicker motor connected to the fuel line. Never an issue with it. The line was replaced from splitter to main motor when added kicker.
I only use prem. In all small motors. The owner before me only burnt prem. Also.
I’m leaning to electrical. I have noticed when the motor quits I try and restart, I don’t here the pump run.
As I stated the pump is new. At this point I’m not thinking the pump itself is the issue.
Could it be in the ignition switch, closing current to the pump. If so can the pump be hot wired for testing purposes?
can the switch be tested to make sure current not being blocked intermitantly? ( it will run fine different days)
What kind of fuel have you been running and what type of fuel lines do you have? I had a similar issue based on what you described and what fixed it was replacing all the lines and pick up. My boats previous owner ran gas with ethanol in it and it made junk of the fuel lines. Went with marine grade fuel lines and it’s been mostly fine....one other issue that popped up because of the crap gas was a rubber diaphragm in the pump developed a hole in it and it would kick off and on.
Checking for either an electrical or fuel line issue is relatively easy. You just need patience. For peace of mind I’d check both if I were you.