1963 Johnson V4AL 15E 75hp

Joined
Mar 16, 2011
Messages
27
Ive cleaned the carbs and cleaned and set my points and im getting a explosion out of the bottom of the lower unit sparatically but it doesn't seem to want to turn over. please help
 

Joe Reeves

Supreme Mariner
Joined
Feb 24, 2002
Messages
13,262
Re: 1963 Johnson V4AL 15E 75hp

I assume that the engine is turning over (starter cranking engine over) but it simply isn't starting. If the explosion you speak of sounds like a shotgun going off (firing directly out the exhaust), the engine is out of time.

Did you have the timing belt off? Is this ignition the "Magneto" type or "Automotive" type ignition?
 
Joined
Mar 16, 2011
Messages
27
Re: 1963 Johnson V4AL 15E 75hp

Yes it is cranking. I did have the timing belt off, and its an automotive type i think (the coil wire comes out of the distributor beside the park plug wires and down to the coil). Yes the explosion is like a shotgun going off out of the exhaust.
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: 1963 Johnson V4AL 15E 75hp

Sounds like your timing is off seeing you had the belt off. If I had it in front of me I could set the belt timing for you. Hopefully Joe R will chime in here and tell you how to do it.
 

Joe Reeves

Supreme Mariner
Joined
Feb 24, 2002
Messages
13,262
Re: 1963 Johnson V4AL 15E 75hp

Click on my name to the left, send me a private message with your email address and I'll send you the OMC bulletin pertaining to timing that engine.
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: 1963 Johnson V4AL 15E 75hp

Joe, what was the bulletin#? I've got one for the 58-59 models but can't remember the one for the later ones. Thanks, Boobie.
 

Joe Reeves

Supreme Mariner
Joined
Feb 24, 2002
Messages
13,262
Re: 1963 Johnson V4AL 15E 75hp

Boobie..... Actually it's not a bulletin, I've no idea why I stated "bulletin". It's the various pages from the service manual. If you don't have them and would like to have them, PM with your email address and I'll send them to you.
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: 1963 Johnson V4AL 15E 75hp

Thanks a lot Joe, but if I ever have to work on one of them again I'm sure it will come back. I know what to do, but can't explain it on here. Thanks again.
 

Joe Reeves

Supreme Mariner
Joined
Feb 24, 2002
Messages
13,262
Re: 1963 Johnson V4AL 15E 75hp

Yep, me too. I know what to do but it's too difficult to explain hence the scan & upload procedure.
 
Joined
Mar 16, 2011
Messages
27
Re: 1963 Johnson V4AL 15E 75hp

thank you so much! That did the trick. now that i have a runnin engine time to swap the lower units. Do you know if my 1960 johnson 75hp V4SL-12 lower unit with extension will interchange with the lower unit on the 1963 johnson V4AL-15E electric shift?
 

Joe Reeves

Supreme Mariner
Joined
Feb 24, 2002
Messages
13,262
Re: 1963 Johnson V4AL 15E 75hp

It would bolt up if that's what you're asking, BUT the 1960 unit is manual shift and there would be no way to shift it.
 
Joined
Mar 16, 2011
Messages
27
Re: 1963 Johnson V4AL 15E 75hp

yeah i know, i've pulled the lower units off of both. the electric wiring i can't get pulled through the access point on the side where the plate with two screws comes off.
 

Joe Reeves

Supreme Mariner
Joined
Feb 24, 2002
Messages
13,262
Re: 1963 Johnson V4AL 15E 75hp

If you're speaking of installing the electric shift lower unit, remove that inner side plate, pull the shift wire thru using a string or flexible wire as a snake, spray the inner plate and the shift wire lobes with WD40 as a lubricant, then reinstall the inner plate.
 

Mechaniboss

Recruit
Joined
Aug 15, 2011
Messages
1
Re: 1963 Johnson V4AL 15E 75hp

Just got this motor and would like to have a manual, can anyone help me??
 
Top