Evinrude E-NATION, for those dedicated to water, power, fishing and fun
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Mate
Posts: 1
Registered: ‎04-18-2018

Etec surging in low range rpm's

Hello E-Nation!

 

Im a proud owner of a Evinrude etec 115H.O. (Mod. No. E115DHLINA) (Ser. No. 05332544) (made in 10/2011). I use my motor to troll with and have been experiencing a surging problem in low rpms. The motor starts perfectly, idles perfectly, runs WOT at 5600-5700 rpm. However while trolling in the lowest rpm range it has a random surging issues. Ive got new plugs (indexed), new fuel filter, fresh gas, the gas priming ball stays hard, no kinks in my gas line. I will simple be trolling along sometimes 10 minutes into the trip sometimes and hour into the trip and the motor will get a surge in rpms, sputter a couple tiimes and then go back to normal.

 

PLEASE HELP!

Admiral
Posts: 8,441
Registered: ‎07-14-2011

Re: Etec surging in low range rpm's

Unfortunately that is not much to go on so it would have to be first determined if it was an ignition glitch or a fuel problem.

 

First check would be a compression reading and also using a temp gun, check both cylinder head temperatures at idle which should be in the 140-160° range.  Monitor the fuel pressure at all speeds and when the engine "acts up" to see if there are any changes.  Use a clip-on timing light to show if the ignition flickers or cuts out when the motor starts to run rough.

 

 

 


"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.


Admiral
Posts: 8,441
Registered: ‎07-14-2011

Re: Etec surging in low range rpm's

Unfortunately that is not much to go on so it would have to be first determined if it was an ignition glitch or a fuel problem.

 

First check would be a compression reading and also using a temp gun, check both cylinder head temperatures at idle which should be in the 140-160° range.  Monitor the fuel pressure at all speeds and when the engine "acts up" to see if there are any changes.  Use a clip-on timing light to show if the ignition flickers or cuts out when the motor starts to run rough.

If nothing is obvious, then you may need the services of a trained dealer technician to use the diagnostic software to monitor all the systems while duplicating the running abnormality.

 

 

 


"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.