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Sabb Model G Variable Pitch Propeller

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Mike Anthony
New member
Username: traveller32bogle

Post Number: 3
Registered: 03-2014
Posted on Friday, March 28, 2014 - 06:38 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Greetings to all from Turkey where I am with with my 85 year old sailing friend on his boat.. a 1973 Taiwanese built double ender .. a Traveller 32. We have sailed together for many years.. trouble free till bow.

We have the Sabb model G with a Variable pitch propeller arrangement.
Our problem is as follows:

The shift from forward to reverse has become very stiff.

I have removed the 4 bolts between the Flange that connects to the propeller shaft coupling ( part number G82BC )…. Now , not being connected it is very easy to change from forward to reverse…

I can spin the propeller shaft but not push it out or pull it in at all.

We suspect the problem is in the Propeller boss… the housing holding the propeller blades that controls the pitch.

Do anyone have any exploded diagrams that might help us ( other than the ones in the green handbook ) or any advice.

Also can the Propeller Boss housing be removed while in the water.. ?

I have attached a Picture of the same motor and propeller as we have.

Many thanks for reading,
Mike.. Sailing boat BOGLE Traveller 32 ( plenty on youtube )


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jerome blumberg
Member
Username: jerome

Post Number: 9
Registered: 11-2008
Posted on Friday, March 28, 2014 - 06:56 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

You can do when in the water but it is so much easier when out of the water, and less risk of losing a part in the water...
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Mike Anthony
Member
Username: traveller32bogle

Post Number: 4
Registered: 03-2014
Posted on Friday, March 28, 2014 - 07:54 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Many thanks Jerome for looking at this issue...
Thee is no chance of lifting the boat out as all the hard standing space is booked up well into the summer....
If I feel confident about doing it in the water I would try and get her into the shallows where I could hopefully retrieve any fallen bits.

Jerome , would I have to remove the shaft? or would I just be able to remove the propellor BOSS housing.

i am going to have to order the nylon thrust washers from abroard as ghey might be too worn to serve as samples to make new ones.... anything else could be made locally I expect..

Any suggestions or advice to boost our confidence would be great...

thanks again...
mike
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jerome blumberg
Member
Username: jerome

Post Number: 10
Registered: 11-2008
Posted on Friday, March 28, 2014 - 08:17 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

my experience is : my engine is not a Sabb but a Marna, very old model with similar pitch propeller. The shaft was broken so I had to dismantle the propeller housing(4 screws)and remove the shaft to repair it. So I had to put some kind of sealant to prevent water from invading the boat. I did it in shallow water on a beach in Holland. You should be able to dismantle the housing in shallow water but what makes it uneasy is that the boat is moving, you don't see well, for instance I lost a screw in the sand and could never find it(find a bronze screw with English thread in Holland) plus you have to be prepared to leave the boat like this on the beach by the time your mechanical problem is fixed and the weather can deteriorate in the meantime...so you can end up with a worse situation than present...I was quite lucky that it ended up well but think twice before starting the job...my best, jerome
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jerome blumberg
Member
Username: jerome

Post Number: 11
Registered: 11-2008
Posted on Friday, March 28, 2014 - 08:59 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

you have to think :
did the problem happen gradually or suddenly
isn't there a foreign body inbetween the blades(plastic bag, rope...)
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Mike Anthony
Member
Username: traveller32bogle

Post Number: 5
Registered: 03-2014
Posted on Friday, March 28, 2014 - 09:50 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

hi Jerome ,

the problem is very specific...and the propeller is very visable and without anything around it... this may however been the root problem but fact is the damage is inside the Propellor Boss.

What I am after is an exploded diagram ( other than the one available in the Instruction Book and Parts List ) or even better photographs...

Ideally someone might have the propeller boss at home and be able to photograph it .. even better in pieces. Looking at it like that might give me the confidence to tackle the job in the water...
Again , thanks
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jerome blumberg
Member
Username: jerome

Post Number: 12
Registered: 11-2008
Posted on Friday, March 28, 2014 - 11:46 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

did you look at this : http://www.oldmarineengine.com/discus/messages/3/108151.html
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jerome blumberg
Member
Username: jerome

Post Number: 13
Registered: 11-2008
Posted on Friday, March 28, 2014 - 01:05 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

the mechanism of the blades is extremely simple and sturdy. This is why I rather think that some very thin wire or thread (from fishing nets?)went in there and causes the problem

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