Suzuki 2.2 outboard how to remove stuck prop..?

[Captain Crisp]

Hi,
As part of my lockdown fun, I'm trying to remove my 2 stroke outboard's prop, so I can change the impeller.
I've taken the pin out but the propeller seems absolutely jammed on. Any thoughts?

 

[VicS]

Have you tried hot (boiling hot) water

 

[Martin_J]

I poured half a dozen kettle fulls of boiling water onto my 2.2 prop a few years back... After repeating this for a few evenings, it worked
Don't rush it..

 

[Captain Crisp]

I'll try this in the morning!
Thanks

 

[Captain Crisp]

Don't seem to be getting very far with this. On about my 8th kettle and no movement... Wondering if I should get the hot air gun on it?

 

[RichardS]

Don't seem to be getting very far with this. On about my 8th kettle and no movement... Wondering if I should get the hot air gun on it?

Nothing to lose.

I'm sure that with judicious impact blows around the boss and careful levering and prising distributed around the edge it will break free providing that there is no residual piece of shear pin or similar holding it in. It worked on my identical Suzuki.

Richard

 

[Martin_J]

Don't seem to be getting very far with this. On about my 8th kettle and no movement... Wondering if I should get the hot air gun on it?

I thought the same after the first few evenings trying. I didn't want to risk paint damage using the heat gun.

It moved a few mm on about the third evening then a bit more the next.

 

[coveman]

Could you try squirting some WD40 or equivalent in behind the prop and leave to soak for a night or so? Once you manage to get a small movement it should very gradually move. As has already been said make sure there is no broken bits of shear pin left in. Patience is key!

 

[HissyFit]

You could try the opposite tack, and pack the prop in ice or stand it in iced water. The theory is that you contracting the material of the prop away from the shaft, and vice-versa.

Is there such a thing as a prop puller for hooking around the prop and applying pressure to the prop shaft?

 

[Captain Crisp]

Success! On about the 10th kettle and with increasing brute force....
Needless to say the impeller is absolutely fine.
Should I grease the shaft to make it easier next time?

 

[coveman]

Definitely!!

 

[penberth3]

Success! On about the 10th kettle and with increasing brute force....
Needless to say the impeller is absolutely fine.
Should I grease the shaft to make it easier next time?
View attachment 107281

And you bought it some flowers!

Yes, grease. Also check it's spotlessly clean and remove any burrs or sharp bits

 

[PeterGR]

Well done!
I was following this post as I gave up on mine last year!

 

[RichardS]

You could try the opposite tack, and pack the prop in ice or stand it in iced water. The theory is that you contracting the material of the prop away from the shaft, and vice-versa.

One would have to cool the shaft rather than the prop for that to work.

Richard

 

[HissyFit]

One would have to cool the shaft rather than the prop for that to work.

Richard

Think what you're doing with heat. You are actually expanding the material of the prop, thus jamming the prop on harder. It is only the differential effects of cooling back to ambient between the shaft and prop that allows the prop hole to become larger than the shaft. Cooling is more direct. Scientific experiment needed to demonstrate.

 

[Cardinal]

Think what you're doing with heat. You are actually expanding the material of the prop, thus jamming the prop on harder. It is only the differential effects of cooling back to ambient between the shaft and prop that allows the prop hole to become larger than the shaft. Cooling is more direct. Scientific experiment needed to demonstrate.

Agreed, but cooling the shaft would be even more direct I believe.

 

[penberth3]

Agreed, but cooling the shaft would be even more direct I believe.

It would, but you can't really get to the shaft when the prop is on.

 

[Cardinal]

It would, but you can't really get to the shaft when the prop is on.

Not easily, I agree. Dry ice extinguisher on the exposed end perhaps?

 

[penberth3]

Not easily, I agree. Dry ice extinguisher on the exposed end perhaps?

I don't think so - too much metal around it, i.e. the prop itself, so any effect would be lost very quickly.

 

[HissyFit]

Not easily, I agree. Dry ice extinguisher on the exposed end perhaps?

I don't think so - too much metal around it, i.e. the prop itself, so any effect would be lost very quickly.

You are trying to shrink both the prop and the shaft away from each other. I would suggest blocks of dry ice in water, with the water efficiently conducting the warmth out of both the prop and shaft. One wrinkle I can see would be the need the need to break the ice before breaking the prop free.