Evinrude E-NATION, for those dedicated to water, power, fishing and fun
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Skipper
Posts: 16
Registered: ‎05-14-2019

25 hp etec 2017 tiller

Code 43 on the motor
Head temp exceeds 194f above 3500rpm
What you suggest to change?
Cooling system?
Skipper
Posts: 16
Registered: ‎05-14-2019

Re: 25 hp etec 2017 tiller

Or water pomp? Because is intermittents problems
Captain
Posts: 598
Registered: ‎08-20-2017

Re: 25 hp etec 2017 tiller

Remove cover at rear of engine, remove and inspect thermostat and PRV. Likely pressure release valve is sticking.
Skipper
Posts: 16
Registered: ‎05-14-2019

Re: 25 hp etec 2017 tiller

So i have to change the thermostat you think? And what mean PRV?
Admiral
Posts: 8,402
Registered: ‎07-14-2011

Re: 25 hp etec 2017 tiller


@Max87 wrote:
So i have to change the thermostat you think? And what mean PRV?

Pressure Relief Valve, also called  Blow-off valve,

 

 

 


"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.


Skipper
Posts: 16
Registered: ‎05-14-2019

Re: 25 hp etec 2017 tiller

When i check the thermostat from outside everything seem in perfect condition, no crack on the thermostat, on the report the temp of the motor have never exceed 193f in all history of the motor and 21 fault code43 since 39 hour to 172hour
Captain
Posts: 598
Registered: ‎08-20-2017

Re: 25 hp etec 2017 tiller

Did you pull the thermostat out and check the plastic plunger behind it which is the pressure relief valve for signs of damage? The water pump impellers should also be checked.
Skipper
Posts: 16
Registered: ‎05-14-2019

Re: 25 hp etec 2017 tiller

No i will do that today, someone told me in can put the piece of the thermostat in white vinegar to clean out? WhAt you think? Because if he was broke how i can run to 39 hour to 172hour with 21 faults 43
Captain
Posts: 598
Registered: ‎08-20-2017

Re: 25 hp etec 2017 tiller

Higher speed overheats are usually caused by the pressure relief valve sticking which is located behind the thermostat.
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Skipper
Posts: 16
Registered: ‎05-14-2019

Re: 25 hp etec 2017 tiller

So you suggest to change the pressure relief valve first ?