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

[JerEazy2]

:

ANYBODY ever SAVED one at this point..... any thoughts on reviving it?... Defibrillator paddles? soaking?... etc.?

If your fairly certain that’s the issue - hit EBay or THT and look for the used part or someone parting out a motor. Pretty sure that pump is fairly interchangeable.

[99yam40]

correct me if I am wrong, but it sounds like the pump was run dry while jumping to a 12 volt source until it locked up,twice.
Is that correct?

Maybe someone can let you know when this pump runs.

I believe it runs for just a few seconds at key on and then turns back off unless the motor is running.
OP when were you testing voltages and ground to the pump?

[pstephens46]

correct me if I am wrong, but it sounds like the pump was run dry while jumping to a 12 volt source until it locked up,twice.
Is that correct?

Maybe someone can let you know when this pump runs.

I believe it runs for just a few seconds at key on and then turns back off unless the motor is running.
OP when were you testing voltages and ground to the pump?

Where have you been Yam? Fence work? Starting to worry. Boscoe been sparse lately too.

[99yam40]

yep,
been up clearing that fence line again.
forgot to take a pic today after we shut down

[dray0151]

You're right that got a little overgrown!

[99yam40]

We built that fence back in the 70s, Dad had a stroke in 97 so got rid of cattle.
Uncle leased the land, but never did anything on fences except run hot wires when necessary to keep cattle in or out

[panasonic]

correct me if I am wrong, but it sounds like the pump was run dry while jumping to a 12 volt source until it locked up,twice.
Is that correct?

Maybe someone can let you know when this pump runs.

I believe it runs for just a few seconds at key on and then turns back off unless the motor is running.
OP when were you testing voltages and ground to the pump?

He said it was still in vst tank for the first test and it would not run, jumper wire got hot. I assume that there was fuel in the tank when this was carried out....hopefully.

Then he removed the pump from the vst and tested it on the bench dry, which I cautioned against doing in my earlier post. He said it would run for 5-10 seconds then lock up. That's what I read anyway.

Here is a service letter from Mercury about testing electric fuel pumps, it says not to run no more than 10 seconds dry. And also some pumps can be freed up by soaking. Read for yourself.

https://www.google.ca/url?sa=t&sourc...e1V1GLO7YymMss

[rodbolt17]

el rod hubbard is staying out of this one.
to much bouncing about.
to much mis-information.
it is a stupidly simple system.
you turn the key on.
ecu awakes and says dang sumptin is about to happen.
let me wake up the main relay.
the relay wakes up and applies 12V+ to all yellow/red wires.(fuel pump injectors ect ect).
about that time the ECU applies a ground path for the HP pump .
maybe the ECU thinks someone is fixxen to start the motor.
if the motor is not started within 3-5 seconds the ECU gets disappointed and takes the ground path away.
if you don't understand how to use a multi meter then all is lost.
google kirchoffs laws.
but this thread has way to much mis information for me to comment much.

[boscoe99]

el rod hubbard is staying out of this one.
to much bouncing about.
to much mis-information.
it is a stupidly simple system.
you turn the key on.
ecu awakes and says dang sumptin is about to happen.
let me wake up the main relay.
the relay wakes up and applies 12V+ to all yellow/red wires.(fuel pump injectors ect ect).
about that time the ECU applies a ground path for the HP pump .
maybe the ECU thinks someone is fixxen to start the motor.
if the motor is not started within 3-5 seconds the ECU gets disappointed and takes the ground path away.
if you don't understand how to use a multi meter then all is lost.
google kirchoffs laws.
but this thread has way to much mis information for me to comment much.

People don't seem to care much about what is supposed to happen, in what order, and when.

They post a problem and want a solution. A simple and cheap one at that.

From what I can see from where I sit.

[Junglejim03]

Okay guys...
Every test suggested on this forum was followed.

Pump was NEVER run dry in Pot on boat.
All wiring was tested per what you guys suggested, with multi meter etc.
supply through to pot was tested and full volume on primer pump.
Pump was deamed DEAD... installed on boat.

Pump is pulled...

Just to CONFIRM it was dead... i tested on bench... for 3-5 seconds... got same result as ON BOAT
Super High draw to even start...

Pump is on way from ebay supplier at 10% of cost of Yamaha branded pump
had never priced anything but YAMAHA part... $535



AGAIN.... THANKS... YOU WALKED ME THROUGH THIS... IT IS FOR ALL PRACTICAL PURPOSES FIXED.

WHAT IS WRONG WITH A THANK YOU...? IT WAS SAID IN POST 19?

.

[Junglejim03]

YOU POINTED ME TO SCHEMATICS FOR MOTOR... AND REFERENCES TO BOAT MANUFACTURER WIRING.

i STILL HAVE WIRING ISSUES UNRELATED TO THIS ISSUE... THEY DEAL WITH INSTRUMENTS ON THE BOAT... NOT THE MOTOR
THERE ARE SEVERAL CONNECTORS WITH ELECTRICAL TAPE ON THEM... IN THE MOTOR... I CAN NOW IDENTIFY THEM AND UNDERSTAND WHY THEY ARE ABANDONED

i CAN TRACE THIS ALL OUT...

DUE TO YOUR HELP...

[Junglejim03]

Don't really get why the unnecessary trashing is necessary...

After problem is solved...

[boscoe99]

el rod hubbard is staying out of this one.
to much bouncing about.
to much mis-information.
it is a stupidly simple system.

but this thread has way to much mis information for me to comment much.

If you want to see some splatter gunning head on over to The Hull Truth (the nonsense, the whole nonsense and nothing but nonsense).

More fake news more of the time. I feel sorry for the stop by's that are looking for help. Eighteeen different answers at times. How do they separate the one good one from the seventeeen crap ones?

There is a guy over there however (fwpratt) who offers good information.

[99yam40]

Don't really get why the unnecessary trashing is necessary...

After problem is solved...

Not sure what you are calling trashing, but you were still asking questions in and after #19.

we still have no idea if you were doing measuring during that few seconds at key on, or way after the ECU removed the ground for pump to be runing

saying you feel this or that without measuring amps, pressures, etc makes for difficult troubleshooting.
but If you got to what the fix needed, you are where you wanted to be.

Panasonic did post a link to what Mercury recommended for freeing up a pump

[rodbolt17]

while there is no spec that I have found much over about 6 amps and the system gets flakey.
however it is a simple DC circuit.
the main relay is awoken by the ECU and applies 12V+ to the pump and injectors the ECU makes the ground path.