Johnson HS15 flywheel removal

[gonecat]

It’s been a while since I’ve worked on an HS Johnson motor.

I see three smaller holes on the top of the flywheel, but I don’t think they are threaded.

How do I pull the flywheel on a Johnson HS-15?

Thank you.

Steve

[Tubs]

Edit – Flywheel was from a1937 LS 2.1 hp.
.

A "Boathouse Repair" is one that done without having tools or the skills to do it properly.

• This reply was modified 2 years, 8 months ago by Tubs.
• This reply was modified 2 years, 8 months ago by Tubs.

[gonecat]

the flywheel you show is from, I believe, a DT or AT or similar 5hp model.

This is what the 2.5 hp flwheel looks like.

Funny, I took one of a long while ago. I just can’t remember which tool(s) I used to do it.

• This reply was modified 2 years, 8 months ago by gonecat.

[frankr]

Is that a nut that also acts as a puller?  Does simply unscrewing the nut also pop the flywheel loose?

[joecb]

If it the type that has the flanged nut that bears up under the rope sheeve, use care… do not apply so much pressure that will actually “pop” the flywheel off. Apply just firm pressure and then give the nut a firm rap with a heavy hammer,  that will pop the flywheel without cracking the die cast sheeve.

Joe B

[gonecat]

I recall that the HD-25 has the same flywheel. I pulled a lot of them several years ago. I just can’t remember how I did it.

I might very well have carefully and slowly used a gear puller rigged on this type. It’s the only tool I can think of besides the standard flywheel type puller . The three smaller holes do not appear to be threaded on this particular flywheel.

I know there is a simple method, just drawing a blank lol

Unlike the AT, DT, TD, etc this model does not have a flanged nut to use to pull the flywheel using the rope sheave.

[frankr]

Well ok, time for back to basics.  Do not hammer on the flywheel nut, which probably damage the shaft threads.  Use a flywheel knocker.  It will remove it without damage.  You can buy them, or make your own for less than a buck.  Find two nuts, same thread as the flywheel nut, and a short bolt, the shorter the better.  Screw one nut onto the bolt, then the other one on only a couple of threads.  Run the first nut down to jam against the second one.  You have just made a special tool.

To use, hand tighten the tool onto the shaft.  Lift or pry the flywheel upward.  Give the tool a rap or two with a hammer, and the flywheel will pop loose.  Put the sledge away, and use a hammer 12 oz or 16 oz at the most.  It is the shock that does the job, not the bash.

 

[Tubs]

The flywheel nut looks to be threaded all the
way through. If that is the case and its not too
beat up from being hammered on previously
you can use it with a bolt as in Franks method.
Tubs.

A "Boathouse Repair" is one that done without having tools or the skills to do it properly.

[gonecat]

I knew it was something simple. Thanks for the help!

[Author]

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