Anne and John Hollamby <annejohnholl@...>
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Sent: Saturday, March 29, 2014 4:06 PM
Subject: Re: [Amel Yacht Owners] Prop Shaft
I cannot even imagine the problems and expense of changing the
propshaft. The pic that you have shown us looks horrendous but hopefully that is
the whole extent of the damage and if so the reduction in strength should
perhaps be relatively unimportant. Just in case the damage is more extensive I
suggest that you have someone put the engine in gear and turn it over by hand
using a lever between the bolt heads on the pulley for the fan belt and listen
to find out if the bearings/gears in the unit have seized up. This is unlikely
as presumably the engine was used recently to get the boat ashore.
If you examine the wearing out bush you will find that there
is an O ring inside it and this is what keeps the oil in whilst the bush turns
with the prop shaft and the three oil seals on the outside of the bush keep the
oil in when the shaft and bush is turning. Now you need to give the shaft a
‘colonoscopy’ to see how far the shaft is damaged. Car part vendors sell an
endoscope that is small enough to fit down the dip stick tube for about €80
euros and this should do the job. If you are unlucky and the shaft is pitted
further in than the existing O ring position look further on and you may find
that there are positions where an O ring could make a seal and if so then when
you get a new bush you can have a new
groove cut for a second O ring to do the job. If you sleeve
the old wearing out bush as I have done on mine your shaft problem may be
solved without even getting a new bush.
There is clearly an electrolysis problem either arising from
your boat or the marina,neighbours and this must be resolved. You certainly need
to get a really good marine electrician to check your wiring and to install a
I look forward to hearing the result of your endoscopy
examination! Meanwhile I suggest that you get a copy of Nigel Calders book on
boat maintenance, It should become your bible.
Now I must go down to the yard to remove my prop (with
Best wishes, Anne and John, Bali Hai, SM319,
Sent: Saturday, March 29, 2014 4:29 AM
Subject: Re: [Amel Yacht Owners] Prop Shaft
Yeah, looked there too.
If I recall
correctly, it is not in the books with all the manuals it is (I believe) in
the owners manual with all the colored photos.
am not on the boat.
I looked through everything I have , Eric. I would swear
I've seen that drawing, but I can't find it.
the back of the owners manual there are pages that fold out with plumbing
diagrams, etc and also drawings of the bow thruster, sail drive and many
Do you have
an owners manual?
I don't have it aboard, Eric. If anyone had it I'd
appreciate it if you'd email me a copy . Karkauai at yahoo dot
looked for a drawing of the C drive. It must be in the books on
memory I believe it will be a big job.
Thanks Eric. Yeah, it's pretty scary. Lucky we
didn't lose the prop. I just discovered it and haven't talked to the
marina yet. I'll have to find out more about the galvanic
isolator...good idea about just turning on shore power once in a
Any idea how to remove the prop shaft?
I'm going to have an electrician go over the boat
looking for stray currents...any suggestions about that
I use a
galvanic isolator on my AC circuit and also have the pedestal turned on
only one day a week. So far in 3 months in the marina in the Caribbean I
have used one kilowatt of electric.
is a small zinc on the line cutter, and of course the 2 big ones on the
very sorry for the condition of your prop shaft. I believe there should
be a drawing of your c drive in the owners manual . I believe replacing
the shaft is a big project. It is also possible that a neighbor is
putting AC into the water.
have the marina check your AC outlet on the pedestal and the water
around your boat?
I have just hauled Kristy out to repaint the bottom after 2 1/2
years. She's been sitting in the water in a marina at Brunswick GA
for the last 2 years where I've hired a diver to clean the bottom and
replace the zincs as needed every 4-6 weeks. I was surprised to
see no zinc on the prop when we hauled out, and dismayed to see severe
electrolytic corrosion of the prop shaft when I started changing the
seals. I posted a pic at the KristySM243 folder https://groups.yahoo.com/neo/groups/amelyachtowners/photos/albums/948071197/lightbox/1877878820
need advice on what is involved in removing the prop shaft. Is it
necessary to remove the bottom of the drive aft of the keel?
I'm going to look into isolating the boat
Currently Tiger Point Marina,