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Captain
Posts: 21
Registered: a month ago
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Midrange temp problem on 300 etec

Hey everyone,  I've been reading posts on this site for a while so I decided to join up. The first topic I wanted to bring up was that I'm having an overheat issue at around 2000 rpm, it's spot on 165 at idle, and it's fine at 3000 or higher rpm at around 155-160, I've heard that this could be the prv not opening properly, further I heard that there may be a softer spring?  What I don't know is the part number of this softer spring.  I've also heard you could possibly just cut the spring? 

 

anyone know of any part numbers for this lighter spring? 

thanks

 

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Admiral
Posts: 8,574
Registered: ‎07-14-2011

Re: Midrange temp problem on 300 etec

Complete model number, please.

 

 

 


"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.


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Captain
Posts: 21
Registered: a month ago

Re: Midrange temp problem on 300 etec

De300pxinr
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Captain
Posts: 21
Registered: a month ago

Re: Midrange temp problem on 300 etec

So?? Nobody knows or it doesn’t exist?
Highlighted
Admiral
Posts: 8,574
Registered: ‎07-14-2011

Re: Midrange temp problem on 300 etec

Your original spring opens at about 9.6 psi and the 348820 spring opens at 7.2 psi.  In some cases the higher flow water inlet screens can alleviate temp problems before getting up on plane.

Inspect your pressure relief valve carefully for cracks or corrosion. An improved type that also is stronger for higher water pressures is available.

 

 

 


"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.


Highlighted
Captain
Posts: 21
Registered: a month ago

Re: Midrange temp problem on 300 etec

Thanks do you the part number for the higher flow inlet screens?

And is there a rebuild kit number for the prv?

Highlighted
Admiral
Posts: 8,574
Registered: ‎07-14-2011

Re: Midrange temp problem on 300 etec

no rebuild kits, too few parts needed.

 

M-Type, M2-Type and L2-Type Gearcases
Water Screen Kits

Ultra High Flow, P/N 5006337 For Aerated water

Ultra High Flow +1/4", P/N 5007081 For Severely Aerated water

 

 

 


"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.


Highlighted
Captain
Posts: 21
Registered: a month ago

Re: Midrange temp problem on 300 etec

You rock, next question, where’s a good place to get oem parts?
Highlighted
Admiral
Posts: 8,574
Registered: ‎07-14-2011

Re: Midrange temp problem on 300 etec

SUPPORT YOUR LOCAL DEALER

 

 

 


"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.


Highlighted
Captain
Posts: 21
Registered: a month ago

Re: Midrange temp problem on 300 etec

So I was doing some investigation, seems like the guy before me already put the ultra high flow plus .25 intake grates on, my question, is that really needed? Could it be causing some of the excessive slip and low top end that I’m experiencing?