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Old 25-07-2020, 17:44   #1
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1974 Johnson HP6 - what have I done?

So I have a 1974 Johnson HP6 outboard. I had it running fine, but turned it off by backing off the throttle, rather than pulling out the choke and now its stuck. I try to pull the starter cord and the flywheel won't move. There are some links to video below.


I really don't know much about this. Hopefully something that a bit of grease will fix.





It running: https://youtu.be/9bpBm8xgaHw

Stuck: https://youtu.be/-n3rb2IgRAc

Stuck after I rotated the flywheel one click: https://youtu.be/McTc2aX1FB0
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Old 25-07-2020, 18:16   #2
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Re: 1974 Johnson HP6 - what have I done?

Videos are showing as private, could not see them.
Does the motor still shift? Is it in neutral?
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Old 25-07-2020, 18:20   #3
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Re: 1974 Johnson HP6 - what have I done?

Hi, thx. I just set them to public. The motor still shifts.
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Old 25-07-2020, 19:14   #4
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Re: 1974 Johnson HP6 - what have I done?

When I try to rotate the flywheel, it turns the throttle
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Old 26-07-2020, 08:55   #5
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Re: 1974 Johnson HP6 - what have I done?

You have to take the flywheel off. Something is stuck between the magnets and the plate that holds the points. Probably a screw for the points or condenser. The trotttle is connected to the plate that holds the points so when you accelerate the timing advances.
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Old 26-07-2020, 08:57   #6
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Re: 1974 Johnson HP6 - what have I done?

Yeah, nothing to do with how you turned it off. Something came loose. Great engines and easy to repair.
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Old 26-07-2020, 09:37   #7
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Re: 1974 Johnson HP6 - what have I done?

Is it the flywheel won't spin or the cord just won't pull?
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Old 26-07-2020, 11:04   #8
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Re: 1974 Johnson HP6 - what have I done?

Are you sure the throttle isn't advanced? Unless the throttle is on start or lower you cannot pull the starter cord.
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Old 26-07-2020, 11:16   #9
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Re: 1974 Johnson HP6 - what have I done?

Quote:
Originally Posted by Scubaseas View Post
You have to take the flywheel off. Something is stuck between the magnets and the plate that holds the points. Probably a screw for the points or condenser. The trotttle is connected to the plate that holds the points so when you accelerate the timing advances.

Scubaseas is correct.


The magnets in the flywheel will attract loose metallic items which then jam between the flywheel and the coils.



Though unlikely, you may be able to see what is going on through the windows in the flywheel that allow the points to be adjusted. Usually there's a thin metal cover that is easy to remove once you remove the flywheel nut. Then you can look around, maybe use a dental mirror and flashlight.



Otherwise you will need a puller to get the flywheel off. Often, auto parts stores have a steering wheel puller that they will loan you for free, which will work.


As pointed out upthread, this has nothing to do with how you shut down the motor.
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Old 26-07-2020, 17:15   #10
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Re: 1974 Johnson HP6 - what have I done?

There is an interlock that prevents you from pulling the starter cord with the motor in gear / throttle advanced too far, take a close look at all of that linkage before you go to pulling the flywheel off- I seriously doubt that you have something loose under the flywheel - far more likely that something has gone wrong with the linkage that locks the starter cord assembly-- if you don't see anything then take off the recoil starter and see if you can move the flywheel by hand-- if you can then you know the issue is in the recoil unit or attached linkage-- if you cant well you had to get that off to get at the starter unit anyway. Harbor freight carries a cheap puller that can be used for many things if you need to get the flywheel off.
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Old 26-07-2020, 17:17   #11
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Re: 1974 Johnson HP6 - what have I done?

So you got your Johnson stuck
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Old 26-07-2020, 19:23   #12
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Re: 1974 Johnson HP6 - what have I done?

Quote:
There is an interlock that prevents you from pulling the starter cord with the motor in gear / throttle advanced too far, take a close look at all of that linkage before you go to pulling the flywheel off

100% correct. I should know better I have one of these. Haven't used it in years though but
Quote:
When I try to rotate the flywheel, it turns the throttle
makes me think there's something jammed under the flywheel. For sure make sure it's in neutral and the throttle is at "start"
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Old 26-07-2020, 20:29   #13
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Re: 1974 Johnson HP6 - what have I done?

Quote:
Originally Posted by IslandInfedel View Post
So you got your Johnson stuck
Itís only a 6. Not a big Johnson.

Make sure the neutral interlock is not preventing the pull chord. Try manually rotating the flywheel. If it may be turned then nothing is wrong under the flywheel.
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Old 28-07-2020, 00:33   #14
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Re: 1974 Johnson HP6 - what have I done?

Hi everyone, thanks for all the replies. You know, it does not feel like something is stuck under the flywheel, it moves with some force about 1/8 of a turn. It feels like it was related to how i turned the thing off - ie backing off the throttle - I had to turn this with some force to get the engine to die.



Here's another video that shows the current movement of the flywheel.


You can see, the started would work, if only the flywheel would budge.



https://youtu.be/NVxHJ48c2zA


I appreciate you getting to the bottom of this with me!
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Old 28-07-2020, 01:44   #15
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Re: 1974 Johnson HP6 - what have I done?

Your problem maybe in the interlock/shut off someplace . Like in 31, 29 or 34. Whatever the issue you need to take the flywheel off. When you turn the throttle it moves plate #5. Something is between the flywheel (#3) and the plate (#5) or the magneto (#8) is maybe loose. When you turn the throttle to STOP it usually grounds out the points. It really looks like what ever the issue is. it's under the flywheel. You should be able to turn the throttle and see the entire plate move without the flywheel moving.




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