Evinrude E-NATION, for those dedicated to water, power, fishing and fun
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Mate
Posts: 1
Registered: 2 weeks ago

88 SPL overheat issue

I have an overheat issue that I can't figure out.

 

A few notes:

 

- new water pump 1.5 years ago.  Only in water once since replacement.  Only run in freshwater.

- new poppets and springs

- New thermostats

- Strong stream at tell tale

 

Over heat alarm goes off after a few minutes.  Infrared thermo said it was hot on all cylinders (over 180 deg) beforeI **bleep** down.

 

Cooled engine.  Pulled the cross over tubes.  restart.  Water flowing through the tubes.  cylinder temps in the 90's.  No overheat issue.  Engine ran fine.

 

Re-connect tube - Overheat.............

 

When i replaced the thermostats, the one I replaced looked fine.  Still overheating with new components.

 

Anything else I should be checking?

 

Highlighted
Admiral
Posts: 9,387
Registered: ‎07-14-2011

Re: 88 SPL overheat issue

check the air bleed hole in the plastic thermostat plate for being plugged up. Also use a triangular file to make 2 small notches in the white pressure relief valves to bleed out the air and prevent airlocks from keeping the water from reaching the thermostats when first starting up the motor.  Position the notches to the 12:00 and 6:00 positions for efficient purging of air and draining the thermostat housing completely when the motor stops.

 

 

 


"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
Admiral
Posts: 9,387
Registered: ‎07-14-2011

Re: 88 SPL overheat issue

[ Edited ]

If all else fails, then remove the heads, replace the rubber deflectors, and remove the head water covers and clean out the passageways, and replace water pump with the full factory kit.

 

 

 


"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.