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#11762264 - 08/06/16 07:31 PM My Yamaha 70 acts like its out of gas
one-3lb-er Offline
Extreme Angler

Registered: 10/31/05
Posts: 1295
Loc: Texarkana, TX
I have a 2012 70HP Yamaha that shut down like it was out of gas, I would try to crank it and it would start then die.

this happened after a few hours of fishing, cranked up and moving a little above idle, say 5-8 mph, it just died, crank up then die, crank up then die. I had 3/4 of a tank(14 Gal) of gas. After about an hour, it cranked like nothing was wrong.

This happened back in March. took it to dealer, "could not duplicate" at that time I changed the water separated filter, checked fuel line connections between tank and engine. It happened again yesterday.


Anybody have any dealing with this type of problem?
_________________________
"One-3Lb-er"
PB= 3Lb 4 OZ
Texarkana, TX
Fish in Texas=Wright Patman, Lake of Pines, Caddo Arkansas=Millwood, Greeson, Dierks, White Oak and Oklahoma=Pine Creek, Hugo.

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#11762765 - 08/07/16 07:35 AM Re: My Yamaha 70 acts like its out of gas [Re: one-3lb-er]
YAKaddict Offline
Pro Angler

Registered: 11/02/14
Posts: 524
Loc: Plano
Me too,people seem to have alot of gas issues lately. In my boat I have to squeeze the primer bulb once or twice and start it In choke mode when that happens. When my bulb firms up I'm golden

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#11762768 - 08/07/16 07:38 AM Re: My Yamaha 70 acts like its out of gas [Re: one-3lb-er]
Muzzlebrake Offline
Extreme Angler

Registered: 12/26/14
Posts: 1460
Loc: Euless
Might be overheating with the water temps at or near 90 deg now. might be the water pump is getting weak and doesn't pump enough at low rpm. My EFI 150 will sometimes get hot at extended idle especially is shallow warmer water even with a fairly new water pump. Of course there is always the bad gas thing with the separation of the corn likker.


Edited by Muzzlebrake (08/07/16 07:40 AM)
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From Genesis: "And God promised men that good and obedient wives would be found in all corners of the earth."

Then He made the earth round...and He laughed and laughed and laughed!

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#11762890 - 08/07/16 09:10 AM Re: My Yamaha 70 acts like its out of gas [Re: one-3lb-er]
gary purdy Online   content
TFF Guru

Registered: 05/24/03
Posts: 11100
Loc: Littlefield Tx & Lake A. H. US...
These motors will start vapor locking before the high heat alarm sounds (ethanol). I agree with Muzzlebrake. Put a waterpump in it and replace the thermostat.
_________________________
�The world will not be destroyed by those who do evil, but by those who watch them without doing anything� Remember what He has done and remember that He is not done yet! GOD IS GOOD

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#11763310 - 08/07/16 01:51 PM Re: My Yamaha 70 acts like its out of gas [Re: one-3lb-er]
one-3lb-er Offline
Extreme Angler

Registered: 10/31/05
Posts: 1295
Loc: Texarkana, TX
this happens at idle to just above.

going to replace water pump and thermostat tomorrow,

Thanks Y'all
_________________________
"One-3Lb-er"
PB= 3Lb 4 OZ
Texarkana, TX
Fish in Texas=Wright Patman, Lake of Pines, Caddo Arkansas=Millwood, Greeson, Dierks, White Oak and Oklahoma=Pine Creek, Hugo.

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#11937916 - 11/16/16 09:17 PM Re: My Yamaha 70 acts like its out of gas [Re: one-3lb-er]
one-3lb-er Offline
Extreme Angler

Registered: 10/31/05
Posts: 1295
Loc: Texarkana, TX
Update:

It happened again, yesterday at LOP. running about 1/2 throtle, it just dies. Primer bulb is soft, pump bulb, restart, runs a little, stops, repeat. after a few minutes, it takes off.

I have replaced fuel filters, new hoses and primer bulb, water pump, inspected fuel pick-up in fuel tank. nothing.

any one have any experience on fuel pumps on the engine?
_________________________
"One-3Lb-er"
PB= 3Lb 4 OZ
Texarkana, TX
Fish in Texas=Wright Patman, Lake of Pines, Caddo Arkansas=Millwood, Greeson, Dierks, White Oak and Oklahoma=Pine Creek, Hugo.

Top
#11937957 - 11/16/16 09:47 PM Re: My Yamaha 70 acts like its out of gas [Re: one-3lb-er]
spankyttx Offline
Extreme Angler

Registered: 01/22/09
Posts: 1000
Loc: Denton Tx.
did you check the tank vent?
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#11938156 - 11/17/16 07:12 AM Re: My Yamaha 70 acts like its out of gas [Re: one-3lb-er]
gary purdy Online   content
TFF Guru

Registered: 05/24/03
Posts: 11100
Loc: Littlefield Tx & Lake A. H. US...
Have you changed the manual fuel pump diaphragms? You can get a complete pump for 38.00. Make sure the fuel filter element is in correctly. Found one upside down once.
_________________________
�The world will not be destroyed by those who do evil, but by those who watch them without doing anything� Remember what He has done and remember that He is not done yet! GOD IS GOOD

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#11938269 - 11/17/16 08:24 AM Re: My Yamaha 70 acts like its out of gas [Re: one-3lb-er]
Ol Man River Offline
Extreme Angler

Registered: 06/16/11
Posts: 1391
Loc: SE Texas
Does your 2012 motor have the emergency fuel bypass (red)valve on the front of the engine when you remove the cowling? That valve used to cause that issue until you opened the valve for a short while and ran some fuel through it. Then you would return to normal position and all was good for years normally.

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#11938342 - 11/17/16 09:04 AM Re: My Yamaha F70LA 0411 acts like its out of gas [Re: spankyttx]
one-3lb-er Offline
Extreme Angler

Registered: 10/31/05
Posts: 1295
Loc: Texarkana, TX
Originally Posted By: spankyttx
did you check the tank vent?


yes, no obstruction there


Edited by one-3lb-er (11/17/16 11:08 AM)
_________________________
"One-3Lb-er"
PB= 3Lb 4 OZ
Texarkana, TX
Fish in Texas=Wright Patman, Lake of Pines, Caddo Arkansas=Millwood, Greeson, Dierks, White Oak and Oklahoma=Pine Creek, Hugo.

Top
#11938349 - 11/17/16 09:09 AM Re: My Yamaha 70 acts like its out of gas [Re: gary purdy]
one-3lb-er Offline
Extreme Angler

Registered: 10/31/05
Posts: 1295
Loc: Texarkana, TX
Originally Posted By: gary purdy
Have you changed the manual fuel pump diaphragms? You can get a complete pump for 38.00. Make sure the fuel filter element is in correctly. Found one upside down once.


The engine is a F70LA 0411

I have changed the fuel line with primer bulb. only fuel pump is on engine.
i disassemblied the fuel pump, diaphrams look OK.

fuel filter is correct.

my next thought was the fuel pump assy (6CJ-2441-0-00). where is the best place to order parts from?


Edited by one-3lb-er (11/17/16 10:45 AM)
_________________________
"One-3Lb-er"
PB= 3Lb 4 OZ
Texarkana, TX
Fish in Texas=Wright Patman, Lake of Pines, Caddo Arkansas=Millwood, Greeson, Dierks, White Oak and Oklahoma=Pine Creek, Hugo.

Top
#11938359 - 11/17/16 09:18 AM Re: My Yamaha 70 acts like its out of gas [Re: Ol Man River]
one-3lb-er Offline
Extreme Angler

Registered: 10/31/05
Posts: 1295
Loc: Texarkana, TX
Originally Posted By: Ol Man River
Does your 2012 motor have the emergency fuel bypass (red)valve on the front of the engine when you remove the cowling? That valve used to cause that issue until you opened the valve for a short while and ran some fuel through it. Then you would return to normal position and all was good for years normally.


no "emergency fuel bypass". Fuel lines goes straight to fuel pump located on back of engine.
_________________________
"One-3Lb-er"
PB= 3Lb 4 OZ
Texarkana, TX
Fish in Texas=Wright Patman, Lake of Pines, Caddo Arkansas=Millwood, Greeson, Dierks, White Oak and Oklahoma=Pine Creek, Hugo.

Top
#11938937 - 11/17/16 03:23 PM Re: My Yamaha 70 acts like its out of gas [Re: one-3lb-er]
gary purdy Online   content
TFF Guru

Registered: 05/24/03
Posts: 11100
Loc: Littlefield Tx & Lake A. H. US...
_________________________
�The world will not be destroyed by those who do evil, but by those who watch them without doing anything� Remember what He has done and remember that He is not done yet! GOD IS GOOD

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#11938952 - 11/17/16 03:32 PM Re: My Yamaha 70 acts like its out of gas [Re: one-3lb-er]
spankyttx Offline
Extreme Angler

Registered: 01/22/09
Posts: 1000
Loc: Denton Tx.
f70, still think like you gary, he needs to check the manual fuel pump, that high pressure injector pump will also have a screen filter that needs to be checked, but for some reason, the problem being so sporadic, it almost makes me think electrical
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#11939457 - 11/17/16 08:22 PM Re: My Yamaha 70 acts like its out of gas [Re: one-3lb-er]
one-3lb-er Offline
Extreme Angler

Registered: 10/31/05
Posts: 1295
Loc: Texarkana, TX
What are you refering to "manual fuel pump"?
_________________________
"One-3Lb-er"
PB= 3Lb 4 OZ
Texarkana, TX
Fish in Texas=Wright Patman, Lake of Pines, Caddo Arkansas=Millwood, Greeson, Dierks, White Oak and Oklahoma=Pine Creek, Hugo.

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