NO FUEL... fuel pump not running - 2004 200hp 2 stroke saltwater ?

[boscoe99]

THT logic.

Joe's Yamaha won't run. Joe's fuel pump won't operate. Joe replaced the fuel pump and the fuel pump and the motor now run.

Bill's Yamaha won't run. Bill's fuel pump won't operate. Bill's Yamaha must need a new fuel pump. It fixed Joe's Yamaha. Therefore, it must fix Bill's Yamaha.

[panasonic]

Please post back the results of the fuel pump change.....inquiring minds would like to know.

Any gunk in the VST pot?

[Junglejim03]

There was no gunk in the VST pot.
Pump will not arrive until Wednesday...

PANASONIC... thank you so much for the link to the Manuals... Once I had the schematic from the Manual... All was good

Once again guys... THANK YOU...
I completely understand the entire fuel system now.... and the entire electrical system... which wires are in which bundle and every wire color combo.
The other post with the wonky wiring problems can now easily be traced... I know what ALL the important wiring is to run the ENGINE... only two wires from Yamaha to my boat wiring

Everything else is just simple dc wiring...

[Junglejim03]

SIMPLE ANSWER...

New Pump will make it run....

[Junglejim03]

Next time... for someone with same issue.

1. Remove one plug... check for spark
2. CAREFULLY... try to start engine on ether... if runs... then positively fuel issue
3. Pull the hose attached to VST pot... pump bulb... fuel comes out... it is electrical issue with high pressure pump
4. Test for 12 volts DC at positive wire on injection pump wire to ground... result of test... Relay is closing... and all three fuses are good.
5. Test for voltage across pump... if voltage shown... pump is probably suspect.
6. Remove drain plug on VST... if fuel drains... pump again suspect... replace and reprime
7. CAREFULLY release pressure from schader valve...
8. Remove hose to rail.. Engage pump... no fuel... pump is issue..
9. Remove VST... check pot for clogs... pump is dead
10. Don't freak out over price at Yamaha sites... Look for pump on Ebay... 10% for non branded pump vs. Yamaha price

Follow this sequence... 2 hours for testing and ordering pump max.

[rodbolt17]

like I said, 2 hours is milking it for one simple test that will tell me all kinds of things.
that test should be all of ten minutes.
\

[pstephens46]

Maybe start a third thread?

[panasonic]

like I said, 2 hours is milking it for one simple test that will tell me all kinds of things.
that test should be all of ten minutes.
\

But you are a master Yamaha outboard mechanic, worked on thousands of motors. You can do this on auto pilot.

This man is not a mechanic per say. I thinks he did what he thought was best....that is how the world works isn't it? We all dont think alike or act alike...right or wrong.

We only offer ADVICE and then it's up to the poster to decide what he wants to do with that advice, simple.

I am glad that there are people who decide to take on thier own problems with whatever they run into...that makes are world a better place. New generation don't seem to be able to do anything besides their direct job and have to get someone else to everything else.

Anyone can drag their boat and motor to a shop and have someone else fix it for them, if they can afford it. I applaud all who try and do it themselves.....that what this kind of forum is for.

[walleye1]

But you are a master Yamaha outboard mechanic, worked on thousands of motors. You can do this on auto pilot.

This man is not a mechanic per say. I thinks he did what he thought was best....that is how the world works isn't it? We all dont think alike or act alike...right or wrong.

We only offer ADVICE and then it's up to the poster to decide what he wants to do with that advice, simple.

I am glad that there are people who decide to take on thier own problems with whatever they run into...that makes are world a better place. New generation don't seem to be able to do anything besides their direct job and have to get someone else to everything else.

Anyone can drag their boat and motor to a shop and have someone else fix it for them, if they can afford it. I applaud all who try and do it themselves.....that what this kind of forum is for.

You got it. Take it to a dealer and pay three times before it is fixed.

[zenoahphobic]

But you are a master Yamaha outboard mechanic, worked on thousands of motors. You can do this on auto pilot.

This man is not a mechanic per say. I thinks he did what he thought was best....that is how the world works isn't it? We all dont think alike or act alike...right or wrong.

We only offer ADVICE and then it's up to the poster to decide what he wants to do with that advice, simple.

I am glad that there are people who decide to take on thier own problems with whatever they run into...that makes are world a better place. New generation don't seem to be able to do anything besides their direct job and have to get someone else to everything else.

Anyone can drag their boat and motor to a shop and have someone else fix it for them, if they can afford it. I applaud all who try and do it themselves.....that what this kind of forum is for.

You got it. Take it to a dealer and pay three times before it is fixed.

Plus 1.
There is always merit looking at a problem from a different perspective. The issue with professionals is that they form a particular way of doing things that includes short cuts based on their experience of probability. The negative can be that the uncovering of other issues less likely. Every mechanical and live thing goes through a life cycle, with its own unique problems and eventual failure (death).
I see this dogma in the medical profession, where massive problems are overlooked because they assume that all and not most things fit a simple diagnostic formulae. Example read they other day a tumour the size of a grapefruit inside someone was somehow inexplicably "missed" by various medical professionals leading to the demise of that person. How the 'ell did they miss that!

[zenoahphobic]

THT logic.

Joe's Yamaha won't run. Joe's fuel pump won't operate. Joe replaced the fuel pump and the fuel pump and the motor now run.

Bill's Yamaha won't run. Bill's fuel pump won't operate. Bill's Yamaha must need a new fuel pump. It fixed Joe's Yamaha. Therefore, it must fix Bill's Yamaha.

Despite what I wrote above, because the above "logic" seems so common in the idiot masses, it does become very infuriating.
Example In my past professional life I have loaded some six thousand horses.That means that I would have the experience, obtained the skills and strategies to "train" the horse to "load". Often when I encounter a difficult one and am applying my trade to the fullest with "blood and sweat", there is always the quick f'wit that says I know Betty uses sugar cubes try that. Grrrrrrr.

[panasonic]

Despite what I wrote above, because the above "logic" seems so common in the idiot masses, it does become very infuriating.
Example In my past professional life I have loaded some six thousand horses.That means that I would have the experience, obtained the skills and strategies to "train" the horse to "load". Often when I encounter a difficult one and am applying my trade to the fullest with "blood and sweat", there is always the quick f'wit that says I know Betty uses sugar cubes try that. Grrrrrrr.

Could you expand on the horses job please?..6000.!!!

[panasonic]

Plus 1.
There is always merit looking at a problem from a different perspective. The issue with professionals is that they form a particular way of doing things that includes short cuts based on their experience of probability. The negative can be that the uncovering of other issues less likely. Every mechanical and live thing goes through a life cycle, with its own unique problems and eventual failure (death).
I see this dogma in the medical profession, where massive problems are overlooked because they assume that all and not most things fit a simple diagnostic formulae. Example read they other day a tumour the size of a grapefruit inside someone was somehow inexplicably "missed" by various medical professionals leading to the demise of that person. How the 'ell did they miss that!

I could not agree more.

[rodbolt17]

that is why instruction manuals come with multimeters.
however no one ever reads that stuff.
that is why I post how the system works.
yet no one cares.
it is why I harp about voltage is a simple measure of electrical force. CURRENT is what makes the device wwork.
current can ONLY occure when the circuit is closed.
yes I have done this type of work for over 40 years. I also set up and programmed CNC lathes and mills. I also spent 6 yrs as an FC in the USN. that is why anytime I start something I read how it works extensively.
my hobby now is collecting and shooting antique military rifles. I hand load for about 18 cartridges. the hardest being converting 8mm lebel to 10.4x38 swiss. if you READ about how to do it it is actually simple. just be aware there is a lot of bogus stuff on the net. common sense is required.

[pstephens46]

I wonder if the new pump solved the problem?