Stuck screw on prop anode

[SycloneDriver]

I thought I would take care of simple task today. Replace the prop anode. Had to shave to get my mask to seal. The hookah worked flawlessly. But the screw is stuck in the anode/prop shaft. Normally I would just apply some heat but I can't do that under water. Ideas?

 

[dlochner]

Had to shave to get my mask to seal.

I feel your pain.

But the screw is stuck in the anode/prop shaft. Normally I would just apply some heat but I can't do that under water. Ideas?

Aluminum and Magnesium are pretty soft metals. With a hookah you could use a hacksaw to cut away enough of the anode to let it fall away.

 

[SycloneDriver]

I feel your pain.



Aluminum and Magnesium are pretty soft metals. With a hookah you could use a hacksaw to cut away enough of the anode to let it fall away.

I thought of that but I don't have a saw on the boat.

I'm thinking about putting a drill bit in my cheap cordless screwdriver and putting the assembly in a zip lock bag and drilling the head of the screw off.

 

[dlochner]

I'm thinking about putting a drill bit in my cheap cordless screwdriver and putting the assembly in a zip lock bag and drilling the head of the screw off.

It is probably a SS screw. I'd go with the hacksaw.

 

[SycloneDriver]

It is probably a SS screw. I'd go with the hacksaw.

I'm sure it's stainless. The drill is working but the battey is low and it's not a powerful device anyway. I'm going to let it charge for a bit and try again.

 

[SycloneDriver]

I had to touch up my shave, my mask was leaking too much.

I wish I had some lefthand drill bits with me!

Still waiting for the battery to change.

 

[JamesG161]

I have this tool on my boat. My version rotates the handle too.
In fact I used it today to loosen hose clamp, not with the flat blade type.

Using the right bit, you can ratchet off your screw, underwater.

Jim...

 

[SycloneDriver]

I have this tool on my boat. My version rotates the handle too.
In fact I used it today to loosen hose clamp, not with the flat blade type.

View attachment 216899

View attachment 216900

Using the right bit, you can ratchet off your screw, underwater.

Jim...

The allen head bolt is damaged, especially now after drilling it. I definitely need more tools on my boat.

 

[SycloneDriver]

The anode is off!

The screwdriver is drying out.

 

[SycloneDriver]

The remains of the screw came out easily.

The prop nut is heavily corroded. A wire brush won't remove it. I might have to resort to a chisel.

 

[SycloneDriver]

The hull potential in now 320mV. I didn't take a before reading and I can't remember what it was last winter.

It's been a long but productive day

 

[rgranger]

I keep one of these in my boat. I find that I use it A LOT! besides cutting metal… they make a surprisingly good coping saw. AND they are less than $10

 

[BigEasy]

The hull potential in now 320mV.
It's been a long but productive day

Amazing how something so simple in theory, can be so difficult.
320 seems extremely low for a BEN 31. I am currently using a collar zinc & 6lb drop zinc. Can’t recall last reading (have it onboard); however, i do believe it is in the 800-900 range.

 

[JamesG161]

The hull potential in now 320mV.

If I recall our discussion of your test= 820mv
Jim...

 

[JamesG161]

If I recall our discussion of your test= 820mv

My bad, since it was Aluminum Anode in Fresh water = 420mv

Jim...

 

[BigEasy]

My bad, since it was Aluminum Anode in Fresh water = 420mv

Jim...

Yes, was wondering if different readings occur in fresh water with aluminum anode vs salt/brackish water & zinc anode.

 

[MikeHoncho]

The anode is off!
Get yourself some Corrosion X. It’s amazing stuff.
The screwdriver is drying out.