Would you remove a prop with an angle grinder?

[crown22]

Thanks very much everybody.I will buy a large quantity of hacksaw blades and attempt to saw through the propellor to create a slot in the gap between two of the blades.Crowthers of Oldham have given me the name of somebody who lives near my boat as a
back up plan.Very nice people at Crowthers.I didn't realise that propellors were made to order.I thought they were on the shelf like B&Q!

 

[Iain C]

In my experience it's the order in which you do things that has the most effect. Been sweating for hours in the yard one day with various devices, and an old salt of the club took pity on me and did it in 2 minutes flat.

Puller on, and wound up as hard as it will go...
Heat on the prop, B&Q blowlamp is fine, you don't want colossal heat in it, just enough to warm the prop up...little chance of melting the cutless bearing
One tap with hammer...of it comes.

 

[zoidberg]

I will buy a large quantity of hacksaw blades and attempt to saw through the propellor

You might consider doing that with one of those very useful 'multi-tools' - and a small quantity of blades. Some cooling lubricant, as used in milling/drilling, could also assist.
Don't forget to save the 'key' from its slot in the shaft.

 

[rogerthebodger]

Hi Everybody a follow on to my previous posts.An engineer and two other boat owners have confirmed that my prop has
been trashed by corrosion and needs to come off.An unsuccessful attempt yesterday with two of the three legs of the puller so tomorrow I will be attempting to cut off one of the blades to enable fitting of the third leg.Wind up the pressure and then the blowlamp comes out.If that fails then plan is to cut it off being careful not to damage the threaded part of the prop shaft and the keyway. Any other ideas gratefully received.

Get one of these

https://www.ebay.co.uk/itm/Marine-Propeller-Puller-Removal-Tool-Boat-Yacht-Canal-25mm-/253344009944

 

[doug748]

I found it easiest to remove the shaft, complete with prop, then take it to a man with decent workshop.
Then a combination of improvised puller and a sharp tap with a slide hammer and it popped off with no damage.

With the prop and shaft removed, one trick I was shown is to put the nut back on a couple of turns and then bring the shaft down, with as much speed and force as you can muster, onto a heavy steel block, nut first.
Was very effective.

 

[TQA]

Using an angle grinder is fine IMHO.

Either to cut off a blade or to groove the hub.

Obviously cutting a groove in the hub has to be done with care and you do not have to cut right through to the shaft to help it release. But if you go to far and scuff up the shaft a little that will not cause a problem.

 

[Ruffles]

Puller on, and wound up as hard as it will go...
Heat on the prop, B&Q blowlamp is fine, you don't want colossal heat in it, just enough to warm the prop up...little chance of melting the cutless bearing
One tap with hammer...of it comes.

That's my experience.
It shouldn't take a lot of heat - a couple of minutes with a simple blowtorch until it's warm to the touch And, in case it's not clear from the other posts, you tap the side of the prop boss with a small hammer while holding a larger hammer (or anything sold and heavy) against the other side.

May be too late in this case. But if I have the presence of mind to know I'll be doing something mechanical and sticky I splash some plus gas on it well in advance.

 

[crown22]

It's off!Three leg puller hot air gun and a light crack from my big hammer.Off to buy a new prop tomorrow(ouch).Thanks everybody