Evinrude E-NATION, for those dedicated to water, power, fishing and fun
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Skipper
Posts: 15
Registered: ‎06-01-2019

Identification of engine without data plate

Hello everyone, my son just picked up a “free” 1981 Alumacraft 15’ Jon boat with a motor that was seized-but I have un-seized with Deep Creep and some patience.  Even getting spark on both wires!

Trying to get some info as the data plate has been removed.

The number on the welch plug is J2799570.

Any help from the experts here would be great!

 Thanks 

Johnson welch plug pic.jpg

Admiral
Posts: 8,401
Registered: ‎07-14-2011

Re: Identification of engine without data plate

 

 

The motor may be older than the available serial number database. 

Can  you post pictures of the motor cover decals, the different sides of the powerhead and one each of the whole motor wihout cover from the side and back?

 

 

 


"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: 15
Registered: ‎06-01-2019

Re: Identification of engine without data plate

Will do.
Unfortunately the previous owner painted the cover Tony Stewart orange (and the freeboard area of the boat) NASCAR fan was he.
Skipper
Posts: 15
Registered: ‎06-01-2019

Re: Identification of engine without data plate

Here are some pics:

Motor1.jpgMotor2.jpgMotor3.jpgHood1.jpgHood2.jpg

Admiral
Posts: 8,401
Registered: ‎07-14-2011

Re: Identification of engine without data plate

That style motor cover, powerhead,  and carb was used from 1962 thru 1968. The Johnson green color first came out in 1967 and a darker shade came out in 1968. 

It's hard to tell the exact color from the photos, but my guess would be a 1968  20hp Johnson


 

 

 


"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: 15
Registered: ‎06-01-2019

Re: Identification of engine without data plate

Thanks Bill!
The lower part of the outboard was painted a dark Blue.
We are going to try and fire it up first as is-then replace needed hoses/impeller/carb kit/tank hose/spark plugs.
The hood calls for J4J spark plugs, I pulled hotter J6J out.
Your Thoughts on that?
Admiral
Posts: 8,401
Registered: ‎07-14-2011

Re: Identification of engine without data plate

If the thermostat is installed and warming up the head to at least 125° or better, use the J4C.  If you do a lot of trolling, thermostat is not working, or if you have fouling problems, use the J6C.

 

 

 


"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: 15
Registered: ‎06-01-2019

Re: Identification of engine without data plate

Won't be used much for trolling.

Where and how does one measure the temp for cooling?

Skipper
Posts: 15
Registered: ‎06-01-2019

Re: Identification of engine without data plate

J4J/J6J.........where did I get that from?
Memory is not so good.
Skipper
Posts: 15
Registered: ‎06-01-2019

Re: Identification of engine without data plate

Dang, I kooked under the hood and it does say to use a Champion J4J spark plug!

Under hood.jpg