[Public-List] Propeller Maintenance

[Gordon Laco]

Haha, ‘Martyr’ is the perfect name for a sacrificial anode!


Gordon Laco
www.gordonlaco.com




> On Nov 10, 2020, at 9:37 PM, Marcelo D. Gentinetta via Public-List <public-list at lists.alberg30.org> wrote:
> 
> Kris,
> They call those propeller nut anodes. They come in different sizes. For our boat it is size B. You initially have to purchase the complete set which includes a special shaft nut, the anode, and an allen head stainless machine screw. Once the nut is on the end of the shaft, the anode fits on top of the nut and is held by the screw through the end of the anode. Afterwards, you just replace the anode.  They are made by Martyr anodes in Canada but available through boat stores. 
> Marcelo
> #441
> 
>> On Nov 10, 2020, at 12:51 PM, John Irving via Public-List <public-list at lists.alberg30.org> wrote:
>> 
>> Good idea, thanks!
>> 
>>> On Nov 10, 2020, at 1:40 PM, Kris Coward via Public-List <public-list at lists.alberg30.org> wrote:
>>> 
>>> 
>>> Candy Cane's prop shaft doesn't have enough room for an anode between
>>> the prop and the cutless bearing, but I had no problems fitting a
>>> teardrop-shaped anode on the end of the shaft.
>>> 
>>> -K
>>> 
>>>> On Tue, Nov 10, 2020 at 09:52:05AM -0500, Gordon Laco via Public-List wrote:
>>>> John, perhaps you can cut a shaft anode with a hacksaw and so make it fit between the prop and the cutless bearing?
>>>> 
>>>> The only negative aspect of a thin one is that you may have to replace it more often than a full round one on the shaft.
>>>> 
>>>> Gordon Laco
>>>> 426 Surprise
>>>> www.gordonlaco.com
>>>> 
>>>> 
>>>> 
>>>> 
>>>>>> On Nov 10, 2020, at 9:38 AM, Lou Griffith <lgriffith49 at gmail.com> wrote:
>>>>> 
>>>>> I agree with Gordon. We talked about this on SB, I was aghast that you had no cathodic protection. You said that there wasn’t room on the shaft. I said find it somewhere else
>>>>> 
>>>>> There is good prop paint out there but it is for marine growth not cathode use
>>>>> 
>>>>> Sent from my iPhone
>>>>> 
>>>>>> On Nov 10, 2020, at 9:10 AM, Gordon Laco <mainstay at csolve.net> wrote:
>>>>>> 
>>>>>> Hello John, 
>>>>>> 
>>>>>> No, paint will not stay on, and will not protect your propellor.  You need to affix a zinc anode to the shaft (or the rudder or deadwood as near to the prop as you can manage).  That is the only effective protection.
>>>>>> 
>>>>>> Any marine store will have a collection of zincs in tear drop or shaft mount configurations… They’re cheap and effective
>>>>>> 
>>>>>> Gordon Laco
>>>>>> 426 Surprise
>>>>>> www.gordonlaco.com <http://www.gordonlaco.com/>
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>>> On Nov 10, 2020, at 9:03 AM, John Irving via Public-List <public-list at lists.alberg30.org <mailto:public-list at lists.alberg30.org>> wrote:
>>>>>>> 
>>>>>>> I replaced my propeller about 5 years ago when my boat was in fresh water with a bronze one I got from Australia.  Last year I moved my A30 to the ocean.  It’s pitted as you can see from this picture.  Should I paint it with anti fouling paint?  Should I prime it first?
>>>>>>> John Irving
>>>>>>> Scotch Bonnet
>>>>>>> 
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>>> -- 
>>> Kris Coward                    http://unripe.melon.org/
>>> GPG Fingerprint: 2BF3 957D 310A FEEC 4733  830E 21A4 05C7 1FEB 12B3
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