which tool for unscrewing antares prop

[BartW]

which tool or key is needed to unscrew the prop from a antares 620 shaft drive ?
is this a commonly used shaft drive tool, or is it a specific antares tool ?
thank you for advice

 

[NorthUp]

It looks like your setup is a bit of a hotchpot of modifications and spacers, but
1. is there an cap screw ( allen screw) in the centre of the big propeller nut? If there is, remove this first, with an allen key.

2. Again, the photo is not clear, if there is a hex nut, or a machined brass nut with two flats securing the propeller, either way it should move with a stilson if you cannot find a socket to suit. It might have a left handed thread on the nut.

3. borrow or beg a hydraulic puller, attach to prop and start pulling. You may need to hit the prop with a hammer as well.
If you have not seen a puller fitted before, get an engineer in to pull it for you, or you will do damage that will cost more than his hourly rate.

By the looks of it, the prop has been badly machined/ modified to allow for an mismatched taper on the shaft.

 

[BartW]

here is another picture

there are no spacers,
there is a brass Cap with two flat sides, acting as a nut,
but it is not possible to fit a standard 30 or 33mm key,
as the flat sides are a little recessed between the prop blades,

it seems that the center of the prop is a little machined,
I 'am not sure if this is orriginal from beneteau.

I might use a Stilson, but
what's is the normal thread direction on a shaft drive,
right or left handed ?

sorry for my stupid questions, I have never touched nor looked at the details of a shaft drive prop.

 

[NorthUp]

On this small size 99% of them will be a right handed, 'normal' thread.
Give it a go anticlockwise, and you will soon tell if its getting tighter!
Block one blade with wood to the hull to stop the prop turning.
As far as a spanner goes, it must have been a home brew originally, cut from steel plate.

 

[GrahamHR]

Is that nut fitted the right way around? I'd have thought the end that is a complete circle should have been up against the prop, acting like a washer and spreading the load, rather than the end that has the flats being up against the prop. It would also make it a lot reasier to remove/ refit, as access to the flats would be better

 

[BartW]

Is that nut fitted the right way around? I'd have thought the end that is a complete circle should have been up against the prop, acting like a washer and spreading the load, rather than the end that has the flats being up against the prop. It would also make it a lot reasier to remove/ refit, as access to the flats would be better

yes the nut is the right way around, as it is closed on one side

 

[GrahamHR]

So that bit protruding from the left hand end of the "nut" is actually part of it ? ( I thought it was the exposed end of the propshaft!). What is the hole at the end of it for ? ( a centre from when it was turned on a lathe perhaps, or is it for a locking bolt?). Strange way to machine something, they may as well as left the whole thing as a cylinder wiith 2 machined flats all the way along the sides, then it would have been easy to get a spanner/ wrench on it.

 

[MarieK]

The end of the nut would usually have an anode on it and the hole is used for a bolt to secure the anode. At least I think thats it, same setup on my boat.

Something like this

 

[GrahamHR]

The end of the nut would usually have an anode on it and the hole is used for a bolt to secure the anode. At least I think thats it, same setup on my boat.

Something like this

That makes sense; the photo you included also shows the "washer" end of the nut at the end I'd have expected it, not like it is on the previous photo of the nut/ prop!

 

[PCUK]

Get a new nut bronze before refitting to avoid this problem in the future.

 

[BartW]

The end of the nut would usually have an anode on it and the hole is used for a bolt to secure the anode. At least I think thats it, same setup on my boat.

Something like this

yes thats how it looks like,
but the bolt and the anode are missing

we will try a wrench when snow is gone
thanks for posting

 

[MarieK]

Keep this post updated as I have to tackle this exact same job soon. Give Beneteau a call and find out if its left or right hand thread. My Rodman is RH