Frozen packing nut on prop shaft

[LifesBetterWhenYoureBeating]

The packing nut on my shaft is completely frozen. The lock nut can be loosened easily (as seen on the pic) but the packing nut won't turn on either direction. I have applied PB blaster and other penetrating oils a dozen times, have hit it with a cold chisel but it won't budge. Should I try a heat gun? Any precautions if I do that?

Also, when turning the packing nut I have to prevent the hose from turning as well, but that's tricky as the fitting is round. I've been using a pipe wrench with a rag to not damage it, but there must be a better way?

Thanks in advance

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[SailingHarmonie]

Longer wrenches.

It looks like you have pretty good access. 24 or 36 inch pipe wrenches will almost surely break things free.

[Rohan]

I had the same problem a couple years ago, in fact you can read about it in this thread here:

https://www.cruisersforum.com/forums...ox-234110.html

Bottom line is, I used PB Blaster, a heat gun, a comically big pipe wrench, and eventually the thing turned. I think helped after spraying to let PB Blaster sit overnight.

[LifesBetterWhenYoureBeating]

A heat gun did the trick! I still feel uncomfortable every time I have to use heat or extreme force, for fear of breaking things. Not exactly a good thing when your first boat is an old and not terribly well maintained one

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[Chris Cringle]

Have you tried “Areokroil”. (orange can) it is truly magic stuff and often succeeds when all other penetrants have failed. It is toxic as hell. Are sure you have a clear escape route before you use it. Then take a deep breath, saturate the nut and shaft, and get out of the bilge before you have to take a breath. Not let it sit overnight and, after airing out the bilge the next day, give it a try. Don’t be surprised if you apply too much torque and skin your knuckles when it spins off.