[Public-List] shaft zinc

[Mike Meinhold via Public-List]

I would think replacing the shaft nut is your only solution.  Yes, connecting a ground wire to a zinc would help temporarily.  Drilling and tapping underwater sounds tough- not that replacing the shaft nut is easy!

Mike

Michael J. Meinhold 
meinhold272 at gmail.com / 301 852 0619

> On May 15, 2017, at 10:19 PM, George Dinwiddie via Public-List <public-list at lists.alberg30.org> wrote:
> 
> Gordon,
> 
> From your description, I'm guessing you have an ElectroGuard or Canada Metal zinc (http://alberg30.org/maintenance/MechanicalPropulsion/Zincs/)? Wouldn't it be possible to replace the zinc-nut (which the screw threads into) while in the water?
> 
> - George
> 
>> On 5/15/17 9:37 PM, gordon white via Public-List wrote:
>>  Went to replace the zinc on the end of the shaft today and lo and
>> behold the old zinc and the socket head screw supposed to hold it were
>> gone. It's been difficult to attach the thing, especially under water,
>> for several years. Now it appears the threads (1/4 - 20?) are completely
>> stripped. I know of no way to fix that without hauling out, which is not
>> on the schedule until fall.
>> 
>> 
>>    There was no apparent corrosion on the prop
>> 
>> 
>>    My current solution is to drop a zinc on a piece of wire overboard
>> and attach the other end to the engine somewhere. Probably will use this
>> system only at my dock, as it probably would be a nuisance under way. I
>> know of nowhere to attach it more permanently.
>> 
>> 
>>    My first idea would be to drill out the hole and tap it to a larger
>> thread, but do not want to go to 5/16 if I can help it. Next idea is to
>> hammer in a piece of brass rod (bronze??) or a bronze bolt and drill and
>> tap that back to 1/4 - 20.
>> 
>> 
>>    Anyone had this problem & how did you solve it?
>> 
>> 
>> - Gordon White
>> 
>> Brigadoon II # 275
>> 
> 
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