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Ralph162

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Reply with quote  #1 
This port motor still dogs me...runs fine for weeks, then all of a sudden stalls and either struggles to start, or doesn't start at all. I also notice it makes a noticeable clicking sound.

Been struggling  with this for two years now...can't seem to find a pattern. So far....tanks are new, gas is fine, filters changed, fuel pressures checked, one injector replaced, new starter, lower unit gear and bearing replaced....

Port engine clicking...also stalling, not starting, or running rough
 
Starboard fuel pump noise
 
Port fuel pump quiet

Also, fuel pump on starboard noisy, although that motor runs VERY well....
ElderSparky

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Reply with quote  #2 
Fuel injectors sound like that when they begin running dry of fuel.  I'd check over air leaks/pressure drops from tank to engine, lift pump operation, and then high pressure pump operation.
Ralph162

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Reply with quote  #3 
Hmmm...funny you mention that. When we run offshore we burn 150 gallons for the day. Last year there was about a 4 gallon difference of fuel burned between the motors at the end of the day. This year, the same trip, the port motor (the one stalling) burns 15 gallons less than the starboard by days end.

Not sure if this means anything, but it's worth mentioning. I notice the difference starts occurring within the first few gallons burned, even when we try to compensate for it by running the port motor a little harder than the starboard.
PhilH12

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Reply with quote  #4 
Yes, get that fuel delivery system checked out as ElderSparky says.  Clear hose test included for air leaks.

You Do Not want to be running that engine Lean.  It may take a while but that is "sorta" the fast track to a melted motor.  [frown]

Phil

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Always check the Easy Stuff First!
20' Weeres fishing pontoon
90 HP E-Tec E90DPLSUM  05184332
Lake Tawakoni, TX - Catfish Capital of Texas
Ralph162

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Reply with quote  #5 
Thanks. I really appreciate all the input from you guys. I just have to get my mechanic to follow up.

The port motor actually runs much cooler than the starboard. Always has. Never could figure it out, but both stay well below the max temp. At cruise it's something like 140 for the port and 160 for the starboard. At most, the starboard gets up to about 170 at fast idle.

But like you mentioned, I will try and get the mechanic to check the fuel system. I believe in the past he has checked the high and low pressure and it seemed fine. One injector was low last year so we replaced. Still no improvement. The next thing he was guessing was maybe a reed valve or an ignition issue.  Hopefully he gets to it this week and I have a better idea where he is headed.
PhilH12

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Reply with quote  #6 
Best to do all those tests when running, if at all possible.  Testing on the hose is not always exactly the same - you can't really get the fuel flow "going" for true tests.

Surely no offense to your mechanic, but replacing a fuel injector being "low"?  Meaning what?  And Guessing reeds or ignition?

I'd be scooping a Genuine Service Manual from Barnacle Bill's.  Not that you have to wrench yourself, but at least know what is actually going on and what the "parameters" should be.

Stay on here for the Real knowledge.  Not me, but many of these guys are Professional ETEC shop owners, including Joe who owns BB's and sponsors this forum himself.  They know 'em inside and out.

Phil

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Always check the Easy Stuff First!
20' Weeres fishing pontoon
90 HP E-Tec E90DPLSUM  05184332
Lake Tawakoni, TX - Catfish Capital of Texas
Ralph162

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Posts: 28
Reply with quote  #7 
Uuuugh. So the mechanic went down to the boat today. Said it started fine, sounded fine...this has been the pattern for almost three years now. Whatever the issue, it's intermittent, and unfortunately seems like I have to wait until the next breakdown. He, as well as I, is scratching his head...again. In the past, when we run diagnostics, nothing shows up.

I will be down at the boat tomorrow and see how it runs.
PhilH12

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Posts: 3,498
Reply with quote  #8 
I'm not hearing about the tests described above?  Clear Hose, Lift Pump vacuum, and maybe a High Pressure test while running?  An '07 MAY also have a fuel pump that gets warm and then doesn't work well.  Cool it off and it's OK again - won't show on any Cold Starts at the dock.  The High Pressure test will also see that when out there running and starts to hiccup - oops, fuel pressure is going 'south' and look, here comes the problem.

What was that old quote about doing the same thing over and over?  Not trying to be harsh here, but...  [wink]

Fuel Delivery problems won't throw any codes, and it does sound to me like where I'd be looking - While out on the water.  [smile]

Good Luck!

Phil

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Always check the Easy Stuff First!
20' Weeres fishing pontoon
90 HP E-Tec E90DPLSUM  05184332
Lake Tawakoni, TX - Catfish Capital of Texas
Ralph162

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Posts: 28
Reply with quote  #9 
Thanks Phil. I am not a mechanic, although I have some familiarity and a service manual. The dealer is Evinrude platinum and the mechanic master certified. In the past, the reports showed nothing, the fuel pressure on both sides was fine. Problem has happened on cold starts, other time happens when boat is running...starts to bog, then stalls. Won't restart. Then, magically, in a day, clears itself. Runs beautiful for a few months, then starts acting up.

The things that really gets me, it that I can't seem to find a pattern. Gonna run it tomorrow. Will keep an eye out and for some of the things you mentioned. Trust me, this has had me questioning my sanity for over two years. At least this time I have video taped proof! lol
olypopper

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Reply with quote  #10 
You should ask your mechanic to plumb in a vacuum gauge and clear line at the front of the engine’s fuel line, a low pressure gauge on the bottom of the vst and a high pressure gauge on the vst and let you take them fishing. If the problem is random, you need to monitor and see what they are doing. Your engine is starving for fuel and the snapping injectors are the symptom along with the bogging. This simple test will help pinpoint the culprit.
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Ralph162

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Reply with quote  #11 
That is some REALLY good advice. I will check with my mechanic.

I was down at the boat today. Started fine, ran beautifully. Idles fine, revved high perfect...no clicking noise either. It's definitely intermittent and your suggestion that is starving for fuel at times is definitely on point.

The tanks were replaced two years ago, and there was a fitting on the stainless fuel line that was modified. That was one thing that always was in the back of my mind. But I have no clue.
olypopper

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Reply with quote  #12 
I recently had an engine develop symptoms like yours and the culprit was a fuel line that had collapsed internally.  Some modern fuel lines have an internal liner to meet fuel permeation requirements and these liners can collapse causing fuel restrictions.  Not fun. 
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Ralph162

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Reply with quote  #13 

That's very interesting.

If I install the gauges, I am assuming I would be waiting for the next time the issue appears, then see what is happening with the fuel pressure? The only problem I would have is that the problem is so intermittent and unpredictable. I may go months before it surfaces again. But this seems like a great idea.

The motors ran fine for last three months. I did put new water separators on the recent day it stalled. Maybe that caused the problem that particular day. Maybe it had to burn out some air introduced while replacing them?. That said, this is a problem I had for years with that particular motor. Same exact issue.

Ralph162

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Reply with quote  #14 
Spoke to my mechanic yesterday. We just can't figure out a way to safely install the gauges for an extended period of time. Unfortunately, due to the randomness and intermittency of this issue, they would need to be installed for a while....days, weeks, maybe even months. He loved the idea, just cant come up with a practical way to make it happen.
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