1986 175 HP Johnson Flywhhel removal "Nut Size"

[111torrance111]

I just had a magnet break under the flywheel on my 1986 175 HP outboard, I need to pull the flywheel & replace and have a couple questions.

1. What size is the flywheel nut (I need to buy a socket)
2. What size bolts do I need for the pulley puller?

I assume once removed the replacement of the broken magnet is self explainable?

Thanks for any help.

Jerry

 

[racerone]

No model # but if it is the crossflow it is 1-5/16"-------If a looper style engine it is 1-7/16"----Both types take a 5/16-NF bolt for the puller.

 

[111torrance111]

Went down to the boat and tried to remove the flywheel, the nut size ended up being 1-1/4". I inserted the 3 5-16 bolts in the pulley puller all the way into the flywheel and tried to remove it, 1 of the bolts striped out of the flywheel before coming loose.

I assume now that it needs to be drilled/tapped to the next size up before trying again, sure had a lot of pressure on it before breaking. Should I have used a lubricate on it prior to removal?

I'll add the exact model # when I go back down, I know it's a 1986 175 HP Johnson/Evinrude.

 

[boobie]

You can also heli-coil that striped thread. It will be stronger than the original.

 

[emdsapmgr]

When you had the puller well tensioned, did you give it a rap with a hammer? Usually that shock is enough to pop the flywheel loose-before one of the 3 bolts shears. Bombardier makes a flywheel magnet replacement kit. Two flavors: epoxy glue kit only- 584304 epoxy kit with replacement magnets- 584304. The kits should have basic instructions.

 

[111torrance111]

Thanks again for the help... All is back in order, here's the final update.

Removing the flywheel wasn't easy, after stripping one of the bolt holes Boobie suggested a heli-coil. The Heli-coil worked great, once installed I reapplied the pressure with the pulley puller & though it would strip out again. After 10 or 15 minutes of hitting the flywheel with a big rubber hammer it came loose.

Underneath I found 5 broken magnets and a damaged stator. Purchased new magnets & a used stator and reassembled, all is working just fine.

The Nut Size for this flywheel was 1.25"

This continues to be a great site for boaters...

Jerry

 

[daselbee]

Rubber hammer!!! :facepalm:. One whack with a 3 lb metal hammer would have popped it. (For future reference).

 

[gm280]

Rubber hammer!!! :facepalm:. One whack with a 3 lb metal hammer would have popped it. (For future reference).

Yes some times you have to be a little more aggressive to get the flywheel's attention...