Evinrude 150 fuel problem

[dbevins]

I am having a fuel issue with my Evinrude Ficht 150. Before anyone just bashes the ficht I have had pretty good luck out of the thing up to this point. Long story short but here goes; boat will start and idle great. First trip up the lake of the day and it runs great. No miss, stall, sputter, anything. Second trip of the day (usually an hour or two later) the boat will miss as it gets above 3000-3500 rpm. By miss i mean it completely stalls to an idle then will surge back to full throttle, usually repeating that every few seconds. It is as if it is getting no fuel at all. I have changed the bulb (oem Evinrude) and have changed the fuel filter. The only thing that confuses me is that it will run great at times then run like it gets fuel half the time at other times. The ball still will not consistently get firm when I prime it either which I also find odd. 

 

Could it be the high pressure fuel pump that for whatever reason works at times and not at others? Or could it be getting air in the lines and it causing the same thing? 

 

Any and all help is appreciated.

[Way2slow]

Do you have the diagnostic cable and software? 

There is no "high pressure" fuel pump.  There's a lift pump that pulls fuel from the tank, sends it through the filter to the injectors.  The injectors develops the high pressure.

When it starts this surging, have you tried hand pumping the primer bulb?  If it won't pump you may have a bad anti-siphon valve in the tank, I've seen several of these fail.  They are nothing but a check ball built into the barb fitting coming out of the tank for the fuel line. You can swap it out for just a barb fitting and see if that help. 

Inspect all fuel lines, if any are hard, (not counting the injector lines, they are hard) or have any cracks, they could be sucking air. 

If it's a fuel delivery problem, it's going to be before the injectors.  Bad injectors just cause it to melt pistons.

 

Now, there are some electrical cause also.  It could be going into the lip home mode.  This is to protect the motor if it's getting hot, low oil or a couple of other issues 

[crypt]

10 hours ago, Way2slow said:

Do you have the diagnostic cable and software? 

There is no "high pressure" fuel pump.  There's a lift pump that pulls fuel from the tank, sends it through the filter to the injectors.  The injectors develops the high pressure.

When it starts this surging, have you tried hand pumping the primer bulb?  If it won't pump you may have a bad anti-siphon valve in the tank, I've seen several of these fail.  They are nothing but a check ball built into the barb fitting coming out of the tank for the fuel line. You can swap it out for just a barb fitting and see if that help. 

Inspect all fuel lines, if any are hard, (not counting the injector lines, they are hard) or have any cracks, they could be sucking air. 

If it's a fuel delivery problem, it's going to be before the injectors.  Bad injectors just cause it to melt pistons.

 

Now, there are some electrical cause also.  It could be going into the lip home mode.  This is to protect the motor if it's getting hot, low oil or a couple of other issues 

this in a nutshell......same thing happened to mine. ground wire was corroded.

[dbevins]

12 hours ago, Way2slow said:

Do you have the diagnostic cable and software? 

There is no "high pressure" fuel pump.  There's a lift pump that pulls fuel from the tank, sends it through the filter to the injectors.  The injectors develops the high pressure.

When it starts this surging, have you tried hand pumping the primer bulb?  If it won't pump you may have a bad anti-siphon valve in the tank, I've seen several of these fail.  They are nothing but a check ball built into the barb fitting coming out of the tank for the fuel line. You can swap it out for just a barb fitting and see if that help. 

Inspect all fuel lines, if any are hard, (not counting the injector lines, they are hard) or have any cracks, they could be sucking air. 

If it's a fuel delivery problem, it's going to be before the injectors.  Bad injectors just cause it to melt pistons.

 

Now, there are some electrical cause also.  It could be going into the lip home mode.  This is to protect the motor if it's getting hot, low oil or a couple of other issues 

Thank you! I am changing fuel lines this evening and am doing a check on the lift pump. They told me it had 2 fuel pumps, one lift pump and one to push it from there to the injectors? I tried priming the bulb but it will get firm sometimes and others it wont which is why I believe it is something in the line honestly.  Where is the barb fitting in the tank? where the fuel line connects to the top? I don't think it is electrical because it doesn't throw any codes and when it went into limp home mode before it thew a code. Sorry for sounding like an idiot but I am by no means a mechanic. haha. 

[Way2slow]

The anti-siphon valve is the barb fitting the fuel line going to the motor connects to.  If you screw it out, you will see a plastic ball inside the threaded end.  If you can see through it, someone has already swapped it out.

 

I 've never worked on the fuel delivery side of my 225 Ficht so I will have to double check my comment about the fuel pumps.  I had all six injectors rebuilt when I bought it about 10 years ago but that was because they were all in one of the storage boxes.    Actually, other than a not firing problem I recently had, caused by the kill switch where I didn't notice the lanyard had come out, I haven't worked on mine in 10 years.  The more I think about it, it's seems there is a pump that pumps the pressure up some between the lift pump and injectors.  There parts web site is down so I couldn't check now.

[dbevins]

5 hours ago, Way2slow said:

The anti-siphon valve is the barb fitting the fuel line going to the motor connects to.  If you screw it out, you will see a plastic ball inside the threaded end.  If you can see through it, someone has already swapped it out.

 

I 've never worked on the fuel delivery side of my 225 Ficht so I will have to double check my comment about the fuel pumps.  I had all six injectors rebuilt when I bought it about 10 years ago but that was because they were all in one of the storage boxes.    Actually, other than a not firing problem I recently had, caused by the kill switch where I didn't notice the lanyard had come out, I haven't worked on mine in 10 years.  The more I think about it, it's seems there is a pump that pumps the pressure up some between the lift pump and injectors.  There parts web site is down so I couldn't check now.

Well, I am an idiot. Haha.  When I was changing my fuel line out yesterday I noticed this nice new oem primer bulb I bought and installed actually had the arrow pointing in the wrong direction. Ended Up still changing the lines anyway but it primed and was hard as a rock. Never has done that since I noticed it needed replaced.