1962 johnson 40hp running poorly..video

dstroud1987

Petty Officer 2nd Class
Joined
Feb 23, 2012
Messages
122
hey guys, I am back once again with some problems I am having with my 1962 johnson 40hp outboard. I posted a few weeks ago and described my problem but didnt really get many responses, so i thought I would film the motor running so you guys could see it and let me know what you think.

It ran good for the first couple of times i took it out this season and then one day we took it out, and about half way through the day it started really bogging out at full throttle... it would usually bog down until it almost stalled and then would keep running but not at the speed or rmp it should have been running at.

I really dont know a lot about outboards or engines in gerneral so im kinda starting at square one right now lol
I checked all the fuel lines in the motor and the one going to the gas tank and they all seemed to be in exellent shape. I also checked the gaps on the spark plugs and they were set good. I tried running it with a different fuel/oil mixture.. i was running 50-1 so i tried running it at about 30-1.. and i also ran some carb cleaner through the motor and made sure everything with the choke was functioning good..but none of things made much difference when i started it in my driveway.

I did notice that when i put the throttle to full when testing it.. it still bogged a bit and then reved up to full throttle.. there was some delay though.. and when i put the throttle back down it took a few seconds for the motor to react and go to an idle.

something else thats been bugging me is when the motor is running.. every once and a while you can here a sort of click and then the motor shakes a bit but keeps running the entire time.. and itll do it like once every 2 seconds or something like that.. usually only when i have the throttle about 10% open.. i tried to capture that in the video but its kinda hard to see the shake and here the little noise that it makes. hopefully you guys can kinda see what i mean.

anyways, sorry for the long boring post.. Im just trying to pass on everything thats been going on so you can get an idea.

 

dstroud1987

Petty Officer 2nd Class
Joined
Feb 23, 2012
Messages
122
Re: 1962 johnson 40hp running poorly..video

anyone have any ideas? I seem to be having a lot of trouble finding a shop in my area that will work on this thing for me.. most of them say its too old and too hard to find parts.. im a little desperate to get this baby on the water so i can catch some fish! lol
 

Big Bubba

Senior Chief Petty Officer
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Apr 11, 2007
Messages
746
Re: 1962 johnson 40hp running poorly..video

dstroud1987,
I was reading your post and saw that you ran carb cleaner through your engine. I was wondering when was the last time your carbs were cleaned out really good. If those carbs have not been cleaned out meaning pulled off, soaked, and every passageway blown out then I would start there. You might have a partially stopped up passageway inside your carb or your high speed jet partially clogged up inside your carb.
 

1946Zephyr

Vice Admiral
Joined
Oct 21, 2008
Messages
5,556
Re: 1962 johnson 40hp running poorly..video

How does the ignition system look? You may likely have an ignition issue. Check and make sure the coils are not cracked. Make sure you have a clean connection on your spark plug leads, on the coil end and on the spark plug end. It's nothing uncommon, for someone to replace the coils and they re-use the old spark plug leads without trimming the ends for a fresh new connection. I usually pull the mag plate and clean it thoroughly, when I work over the ignition system. A lot of times, faulty ignition systems will fool us to believe the carburetion is bad.

That's a nice looking motor by the way.:cool:
 

lindy46

Captain
Joined
Nov 27, 2008
Messages
3,886
Re: 1962 johnson 40hp running poorly..video

Agree with Zeph - probably running on one cylinder.
 

KillerKilgore

Seaman
Joined
May 29, 2010
Messages
50
Re: 1962 johnson 40hp running poorly..video

... 1962 johnson 40hp outboard. ...
... I tried running it with a different fuel/oil mixture.. i was running 50-1 so i tried running it at about 30-1..

should be 24-1 mix

... here a sort of click and then the motor shakes a bit but keeps running the entire time.. and itll do it like once every 2 seconds or something like that..

sounds like something in the ignition system. the click is the spark not reaching the plug. heard the same click on a 2000 blazer when I changed the plugs and cracked one. had to run the blazer at night to find which plug was cracked. could also be bad plug wire.

hopes this helps
 

jimmbo

Supreme Mariner
Joined
May 24, 2004
Messages
13,446
Re: 1962 johnson 40hp running poorly..video

Your motor is a 1967 to 1971 model 50:1
 

dstroud1987

Petty Officer 2nd Class
Joined
Feb 23, 2012
Messages
122
Re: 1962 johnson 40hp running poorly..video

Thanks a lot or the help.. I'll definitely being doing a buch of work on it this weekend.. lets just hope i can put everything back in the right place after i take it apart lol Its definitely a 1962 model and the factory mixture was definitely 50 to 1 .. but ive heard that a lot of people run them at about 25 to 1..

Thanks again for the tips.. I'll let you guys know how i make out.
 

yorab

Ensign
Joined
Jul 6, 2002
Messages
960
Re: 1962 johnson 40hp running poorly..video

Take pictures. LOTS and LOTS of pictures. Sure, it slows you down during the disassembly, but it can save you time and add years to your life in terms of lowered stress and frustration during reassembly.
 

kfa4303

Banned
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Sep 17, 2010
Messages
6,094
Re: 1962 johnson 40hp running poorly..video

Thanks a lot or the help.. I'll definitely being doing a buch of work on it this weekend.. lets just hope i can put everything back in the right place after i take it apart lol Its definitely a 1962 model and the factory mixture was definitely 50 to 1 .. but ive heard that a lot of people run them at about 25 to 1..

Thanks again for the tips.. I'll let you guys know how i make out.


Good luck d. While the manual may say you can run 50:1, I like to err on the side of caution, so I run 24:1 in all my '60s era Johnsons and I've never had an issue. There's a bit of smoke upon choked start up, but virtually none after that. Plus, you can always add straight gas to the mix, in a pinch, and still be within an acceptable range. Oil is cheap insurance for your motor and shouldn't cause any noticeable effects its performance in any way.
 

dstroud1987

Petty Officer 2nd Class
Joined
Feb 23, 2012
Messages
122
Re: 1962 johnson 40hp running poorly..video

I've decided to replace the coils and spark plug wires on the motor now and was a little confised about what to order off of iboats. When i find the coils on the website for my make and year i noticed that 3 coils come up. One is a C.D.I. one is a Sierra, and one is a Mallory. Will any one of these work on my motor? is the only difference the brand name? I just dont want to put my order and get stuck with the wrong ones.
 

bonzoscott

Senior Chief Petty Officer
Joined
Jul 26, 2008
Messages
745
Re: 1962 johnson 40hp running poorly..video

I believe they are all the same coils as I have found with different orders on different motors, but I'd like to point out: Don't get in a hurry. Figure out everything you need. Think about also purchasing a carb kit, points and condenser kit, and possibly and impeller. If you get a piece at a time at $10 shipping you could, well do the math.
 

dstroud1987

Petty Officer 2nd Class
Joined
Feb 23, 2012
Messages
122
Re: 1962 johnson 40hp running poorly..video

you just made a great point. I'm rushing a bit to get the motor going, so i could see myself overlooking something and getting stuck having to wait for a new part order to come in.. not to mention the added shipping costs. Does anyone know where iboats ships their products from? just want to get an idea on how long I should expect to wait for them.

Thanks again for the tips bonzoscott, its always appreciated.
 
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