My new project motors: Johnson JW-11 and 1965 Lightwin

[JohnRudeMan]

Hello,

A few days ago I bought some new motors to work on. One is a 1955 Johnson 3hp and the other is a repainted 1965 evinrude Lightwin, I paid 50 euro's (about $60) for both. The guy told me that the Johnson runs, but I haven't tested it yet.
Both outboards has a little bit low compression, but I suspect the rings are just stuck.
I've allready cleaned the carb and fixed the ignition (new wires, set points, new coils) on the '65 Lightwin.

I keep you posted about the progress and I'll try to post some pic's

 

[kfa4303]

Re: My new project motors: Johnson JW-11 and 1965 Lightwin

Hello again JohnRudeMan. I see you've been bitten by the vintage OMC bug again Conrats on getting such a good deal on your new toys. How is the '58 7.5 running?

 

[JohnRudeMan]

Re: My new project motors: Johnson JW-11 and 1965 Lightwin

Hello kfa4303, good to hear from you ! The '58 7.5 runs great and the compression seems to be awsome, but I don't have a compression tester, so I don't know for sure...
Today I have ran the JW-11, but it doesn't run very well, so I guess it needs a good tune-up .

I keep you posted on the progress.

Greetings from the Netherlands

 

[JohnRudeMan]

Re: My new project motors: Johnson JW-11 and 1965 Lightwin

I have a problem with my JW-11. Today I tuned it up (cleaned the carb, set points), but it doesn't run. It starts on every pull, but it dies after 2 sec.
The coils are good and I get good spark on both cilinders, the carb gets enough fuel too.

Does anybody has an idea?

Greetings

 

[kfa4303]

Re: My new project motors: Johnson JW-11 and 1965 Lightwin

......hmmmmm Perhaps the spark plug wires are backwards? The top cylinder wire usually has a small meatl band on it. If that's not it, I'm thinking it may be a fuel delivery issue :/ Did you check the compression with a gauge? The fact that it starts and runs for a bit means the comp is probably ok, but you never know. Here's a handy link that may have some answers. Keep us posted.

http://www.outboard-boat-motor-repa... Johnson 3 HP 1952-1967 Tune-Up Procedure.htm

 

[lindy46]

Re: My new project motors: Johnson JW-11 and 1965 Lightwin

Did you install a carb kit? Clean under the welch plug? Install the high speed nozzle gasket?

 

[JohnRudeMan]

Re: My new project motors: Johnson JW-11 and 1965 Lightwin

Thanks. The plug wires aren't backwards and the spark seems to be good... Could it be water that gets into one (or both) of the cilinders?

 

[JohnRudeMan]

Re: My new project motors: Johnson JW-11 and 1965 Lightwin

Did you install a carb kit? Clean under the welch plug? Install the high speed nozzle gasket?

No, I didn't install a carb kit, I just cleaned the carb and everything looks clean. I didn't put a new nozzle gasket in, could that be the problem?

 

[kfa4303]

Re: My new project motors: Johnson JW-11 and 1965 Lightwin

I would try cleaning the carb again (rebuild would be best, but you may not have a kit handy). I had to do the same thing to my little air-cooled 3 hp Gamefisher yesterday. It would start ok, but bog down when I gave it gas, then it wouldn't start at all even though it had good spark and compression. So I decided to take the carb off. The passages inside the carb were so tiny that it didn't take much to interfere with them. I used some aerosol carb cleaner and blew out all the passages thoroughly, reassembled the carb and it runs great again.

 

[JohnRudeMan]

Re: My new project motors: Johnson JW-11 and 1965 Lightwin

Ok, thanks . I'll take the carb apart.

I keep you posted !

 

[Willyclay]

Re: My new project motors: Johnson JW-11 and 1965 Lightwin

Traded away my JW-11 and wish I had it back now! It ran like the proverbial sewing machine. Great forum signature with all those classic old motors. I got started in this insanity when I was a pup with a Mercury KD-4(S) like the one pictured. Destroyed it doing stupid teenager stuff.

Another thought about your JW-11's running issue is the cork float in the carb. Might be saturated. What do the spark plugs look like after running? Good luck!

 

[JohnRudeMan]

Re: My new project motors: Johnson JW-11 and 1965 Lightwin

Here's a video of it: http://youtu.be/l2LYTqe0PZ0

Enjoy !