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Mate
Posts: 2
Registered: ‎06-11-2017

Stalling

Have a 07 250hp etec. Will start and idle at morning start up, after about 20 min of run time "probably10min at about 1500 rpm then 10min around 4000-5000 rpm the motor will stall and not start until 45min to 1 hour goes by. Then will only run for 10 min or so. Then stall again. I checked fuel pressure which has been good even ran from a portable tank today and same thing happened. Let it idol for 30 min today and thought it was fine but after running out to the river same problem. No alarms. Any ideas?
Admiral
Posts: 6,297
Registered: ‎07-14-2011

Re: Stalling


Mccoy wrote:

Have a 07 250hp etec.

 I checked fuel pressure which has been good even ran from a portable tank today and same thing happened. 

What were the lift pump pressures and the electric pump pressures at idle, cruise, full throttle and when the engine started to stall?  Have you tested for air bubbles in the fuel lines with a piece of clear fuel hose and checked for fuel restrictions using a vacuum gauge?

 

If these tests should be performed by a trained tech if you are not familiar with them, don't have the requred service manual and gauges, or are uncomfortable with  the procedures. 

 

One thing to check also is the venting system on the fuel tank. Be sure there is no vacuum buildup in the gas tank after running for a while.

 

There could be other issues causing the symptoms but more commonly there is something fuel related.

 

 

 


"There is never just one thing wrong with a boat";
                    -- Travis McGee, main character in a book series by John D. McDonald 


 



***************

The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.

The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.


Mate
Posts: 2
Registered: ‎06-11-2017

Re: Stalling

[ Edited ]

So I definitely think it is fuel. I cleaned the vst filter and the motor still would die but seemed to start a little quicker not 30 to 45 min after it shut down. Only checked the high and low fuel pressure at idle. Low was at 6 and high was at 32. Did check fuel for air in between external 10 micron water separator and motor with clear line and there were no air bubbles. I did notice a very small crack above where you would check high pressure on pump. It does seep fuel very slowly. Would this cause the motor to die?  IMG_4261.JPG

Admiral
Posts: 6,297
Registered: ‎07-14-2011

Re: Stalling

 

 

A crack in the fuel system on the high-pressure side that seeps gasoline is a dangerous situation. The VST should be replaced.

 

After the engine quits and will not start for a while, has the ignition or EMM or crank position sensor been checked for proper operation.  A clip-on timing light would show if the ignition system was still operational after the motor stalled.

 

 

 


"There is never just one thing wrong with a boat";
                    -- Travis McGee, main character in a book series by John D. McDonald 


 



***************

The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.

The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.