VP saildrive prop removal

C

colston

Active Member
Joined
23 Apr 2006
Messages
49
Location
Bristol channel, North Somerset
Visit site
Attempted to remove the hex bolt in the end of the cone from a MS25S saildrive to remove the propeller today, it would not budge? is the thread right handed?

I tried tapping the allen key with a hammer but it would not move.

I have had a quick search on the forum but cannot find any previous threads so apologies if anyone has posted a similar problem before
 
Normal thread. Will ned quite a lot to move it as it has loctite type sealer in the threads - not meant to come undone in a hurry. Wedge the prop with a piece of wood against the hull to keep it still while you apply pressure to the key.
 
It is just a normal thread and you will need to brace the prop. We ( or rather I!) chewed the Allen head too much and hated it anyway - so cut abou 1/2 inch off the boss that surrounds the head of the bolt and used a stud extractor to remove the bolt. It was that tight that it was no wonder we couldn't shift it!! Anyway, replaced with a standard bolt ct down to length with a proper socket head on it. Much easier to remove and refit!!
 
I had exactly the same problem and eventually had to get the yard to do it for me. Apparently they often apply heat with a blowtorch to break the seal.
 
This is definitely a two person job. One to block and hold the block to the prop and the other to realy wack the long handled allen key with a hefty hammer. It will come undone eventually.
Thank goodness that they are difficult to remove as a pal of mine LOST his prop, due to improper tightening after re-fit.

Good luck

Peter
 
Colston...

I was going to ask if you are using a suitable tool to undo it and then just re-read that you are using an allen key.. Personally I use a hex fitting in the usual 1/2 socket drive.. As others have said it undoes in the usual direction but the prop cone needs to be held firm at the same time.

Ensure the hex hole is clean first and that you get a snug fit before even attempting to turn.
 
Not sure a blow torch is a good idea. All you will do is heat the aluminium cone, which is not where the bolt is sticking. Also there is a Delrin washer behind the cone which will not react well to heat!

Use a tommy bar with your hex to get the leverage - it will go with a pop and then undo easily. You may find the prop a bit sticky on the splines if it has not been off for a while.
 
Which type of thread lock for underwater applications?

I did manage to remove the bolt with the aid of a decent hex fitting on the end of a socket ratchet.
Now what should I use to lock the new bolts into position?, ordinary Loctite 243 is not suitable for the aquatic environment?
 
You must log in or register to reply here.

Share this page

Top