I may of been a idiot

[darrenwest1]

First time out on rib. I forgot to vent the fuel tank. So a hour in the engine died. Looked at tank and realised my mistake.
Now only ribs for a couple of mins after priming. But re starts after a squeeze or 2

Is it likely I’ve fudged up the electronic fuel pump.

2010 60 efi mercury

Thanks all

[beamishken]

I think I'd be checking the fuel line for internal degradation particularly those silver grey hoses break up internally & cause issues check the fuel filter for debris too. It may be the extra vacuum has pulled particles off an already degraded fuel hose

[smallribber]

Originally Posted by darrenwest1

First time out on rib. I forgot to vent the fuel tank. So a hour in the engine died. Looked at tank and realised my mistake.
Now only ribs for a couple of mins after priming. But re starts after a squeeze or 2

Is it likely I’ve fudged up the electronic fuel pump.

2010 60 efi mercury

Thanks all

My Friend did exactly the same on that same engine. He did not have any issues but his did not die he just collapsed the tank. Opend the vent waited a while and all was good

[darrenwest1]

ok so im back home ,,, a little more info , the fuel lines are all 4 weeks old and are the 2 tanks also protected by a new fuel filter

so start the engine up with bellows on for water , it runs perfectly for around 45 secs , then starts to run a little lumpy then dies , will immediately fire up and run the same again

im a little stumped here

[darrenwest1]

Originally Posted by smallribber

My Friend did exactly the same on that same engine. He did not have any issues but his did not die he just collapsed the tank. Opend the vent waited a while and all was good

it may be that the fault was not the fuel tank but I noticed it when I looked after the engine died

it had been running for a good hour in the ocean perfectly up till this point

[darrenwest1]

it could be a totally separate issue. that I forgot to vent the tank and that the engine has issues

the fuel lines to the ( what im assuming ) is the lift pump located on the rocker cover are perfectly clear , then from there to the base of the large casting which again im assuming houses the high pressure injection pump , now these I have yet to check and prove

[neil.mccrirrick]

Check the fuel bulb. You’ve probably bust the one way valve in it. You need to take it off and blow through either end. One way should blow clear the other should be blocked. If they are both clear you need a new one

[darrenwest1]

Originally Posted by neil.mccrirrick

Check the fuel bulb. You’ve probably bust the one way valve in it. You need to take it off and blow through either end. One way should blow clear the other should be blocked. If they are both clear you need a new one

you mean the inline bulb you use for priming ?
if so its fine already checked that
thanks

[darrenwest1]

right ive tested the high pressure pump I have 55 psi constantly whilst at 1000 rpm

how ever .... the idle air controller valve . this could be my issues , it starts puffing every few seconds which is fine , then it seems to be puffing more and more then the engine dies , now if I put my finger over the pipe that has a vacuum , it runs perfectly until I remove my finger then dies
so is this my issue and this was always the issue and not the tank not venting .
im assuming its ECU controlled ? can I test it some how ?. do I just replace it ? or am I just barking up the wrong tree , thanks

[darrenwest1]

speaking to previous owner he did say on the last trip out he may of sucked a load of sand uo as he ran in to a sand bank . is this relevant ?

[spartacus]

Originally Posted by darrenwest1

speaking to previous owner he did say on the last trip out he may of sucked a load of sand uo as he ran in to a sand bank . is this relevant ?

Shouldn't do, the sand will have circulated through the cooling system. If the tell-tale is strong I wouldn't worry. You can pop out the thermostat for a closer look. You will need a new gasket to refit.

[darrenwest1]

Originally Posted by spartacus

Shouldn't do, the sand will have circulated through the cooling system. If the tell-tale is strong I wouldn't worry. You can pop out the thermostat for a closer look. You will need a new gasket to refit.

its pi$$ing like a racehorse so all is good I feel

[jeffstevens763@g]

I’d say it’s dragging air in because of the pressure exerted on the fuel lines etc when the vent was closed, process of elimination I’m afraid

[darrenwest1]

Ok but what controls it.
And to be honest I think it may of beeen at fault all the time. As other than when I was returning to dock I was at 1/2 throttle all the time. So would not of notic d the idle issue.

Also I can suck through the valve when engine is off

There is some restriction but it’s deff passing air

What controls the valve ? there must be something giving the ecu the signal to open and close it
im pretty handy with most things , but outboards are new to me
you say there is a process , please advise me of this , thanks

[jeffstevens763@g]

Any water in the fuel ?

[beamishken]

Originally Posted by darrenwest1

right ive tested the high pressure pump I have 55 psi constantly whilst at 1000 rpm

how ever .... the idle air controller valve . this could be my issues , it starts puffing every few seconds which is fine , then it seems to be puffing more and more then the engine dies , now if I put my finger over the pipe that has a vacuum , it runs perfectly until I remove my finger then dies
so is this my issue and this was always the issue and not the tank not venting .
im assuming its ECU controlled ? can I test it some how ?. do I just replace it ? or am I just barking up the wrong tree , thanks

This looks like your barking up the right tree iac valves can & do fail but I've no idea how you'd test it other than swapping it with another or plugging into diagnostics to help track down the fault. Modern outboards are much like cars in so much as they need plugged in to help with diagnosis. Sounds like the fuel vent was a red herring to be honest

[jeffstevens763@g]

I had water in my IAC valve engine would start but only run for a few seconds then die but if I pumped the bulb then slip it into gear and give it some revs it would run happily until back to tick over I had the fuel system blown out with compressed air no probs since may be the vent closed and released gave a surge of fuel which was contaminated from the bottom of the tank

[darrenwest1]

I have a new valve on order will be here friday . think I need to start there

[Peter_C]

What is the spec for the fuel pressure and what is the actual fuel pressure? What does the engine do if you spray a starting fluid in as soon as it dies?

[darrenwest1]

Originally Posted by Peter_C

What is the spec for the fuel pressure and what is the actual fuel pressure? What does the engine do if you spray a starting fluid in as soon as it dies?

50-60 psi at 900 rpm is the recommended setting
I have 56 psi constant with no fluctuations

not tried the easy start thing

I had ordered a new iac valve but the supplier just cancelled after it was due today .