Prop shaft zinc 321

Mechone · Dec 17, 2020

Look Martyr is the largest anode maker in the world and CMC25eruoZ=zinc and is 5/8 thick CMC25euroM =Mag5/8 thick and CMC25euroA =Aluim 5/8 thick .
The one you are saying at West Marine is NOT martyr and its not 22.95 or 1/2 inch thick
Martyr also makes limited clearance CMC25Z,CMC25M and CMC25A which is 1.25 inches wide which I now use as I added a RD coupling between my coupling haves extending the shaft allow for the extra width
I pay 20 dollars CDN for mine which is like 14 US and the eruo style is cheaper

Home - Martyr Anodes look at there catalog no one compares

fstbttms · Dec 17, 2020

OK, here's the deal- you guys are looking at different anodes, NOT the Beneteau limited clearance (or "micro-thin" anodes.) Typical limited clearance anodes are available in both metric and SAE sizes and are usually around an inch thick. The special micro-thin limited clearance anodes (initially developed specifically for French boats) are available in most metric and some SAE sizes. They run about 1/2" thick.

Richard19068 · Dec 17, 2020

Look, I don't care. I have no dog in this hunt. Just got interested because I have been having zinc problems.

Here is the Martyr item CMC25EURO at West for $8.79 in zinc.
.61" / 15.5 mm thick.

LB

KG

H

OD

ID

Al

CMC25EUROA

0.211

0.096

mm

15.5

60

25

Mg

CMC25EUROM

0.149

0.068

in

.61

2.36

.98

Zn

CMC25EURO

0.485

0.22

The BoatZinc item is 11/16" / 17.5 mm. A little thicker than the Martyr. It is also 3" in diameter compared to 2.36" for the Martyr. Thus the BoatZinc item is heavier (.9 lbs vs .485 lbs)) and probably provides more protection for the extra money - $14.53.

I would imagine both would fit the Benetau.

Besides the Martyr, West ALSO sells another zinc that should fit the limited clearance 25mm shaft :
SEA SHIELD MARINE–Beneteau Micro Collar, 25mm $22.99

I don't know why you would buy that over the other two for the money.

fstbtms, I know you do this for a living and I am not trying to be argumentative. I've learned much from your posts. But as I see it the Martyr CMC25EURO from West Marine for $8.79 should fit shouldn't it? I'm not saying it is the best buy pound for pound, just that it is an option.

Mechone · Dec 17, 2020

Richard19068 said:
Look, I don't care. I have no dog in this hunt. Just got interested because I have been having zinc problems.

Here is the Martyr item CMC25EURO at West for $8.79 in zinc.
.61" / 15.5 mm thick.

LB KG H OD ID
Al
CMC25EUROA
0.211
0.096
mm
15.5
60
25
Mg
CMC25EUROM
0.149
0.068

in

.61 2.36 .98
Zn
CMC25EURO
0.485
0.22

The BoatZinc item is 11/16" / 17.5 mm. A little thicker than the Martyr. It is also 3" in diameter compared to 2.36" for the Martyr. Thus the BoatZinc item is heavier (.9 lbs vs .485 lbs)) and probably provides more protection for the extra money - $14.53.

I would imagine both would fit the Benetau.

Besides the Martyr, West ALSO sells another zinc that should fit the limited clearance 25mm shaft :
SEA SHIELD MARINE–Beneteau Micro Collar, 25mm $22.99

I don't know why you would buy that over the other two for the money.

fstbtms, I know you do this for a living and I am not trying to be argumentative. I've learned much from your posts. But as I see it the Martyr CMC25EURO from West Marine for $8.79 should fit shouldn't it? I'm not saying it is the best buy pound for pound, just that it is an option.

It 100 % fits PERIOD I have used them for years , holly smokes fstbtms let it go you are wrong

fstbttms · Dec 17, 2020

Richard19068 said:
...as I see it the Martyr CMC25EURO from West Marine for $8.79 should fit shouldn't it? I'm not saying it is the best buy pound for pound, just that it is an option.

Of course it fits and I never said otherwise. I didn't realize that West Marine sold that anode until now.

DPW · Mar 16, 2021

on the same topic: I have Beneteau 43, 2008. I used to put a collar zinc on the shat and a prop zinc. However, sailing in the NE finally convinced me to add a line cutter to the shaft and now there is not enough room for a collar. The standard prop zinc by itself does not last the season. Does anyone know if there are larger size prop zincs available?

fstbttms · Mar 16, 2021

DPW said:
on the same topic: I have Beneteau 43, 2008. I used to put a collar zinc on the shat and a prop zinc. However, sailing in the NE finally convinced me to add a line cutter to the shaft and now there is not enough room for a collar. The standard prop zinc by itself does not last the season. Does anyone know if there are larger size prop zincs available?

The size is the size. You should've known better when you bought a French boat

That said:

Beneteau Line Cutter Anode 30mm

Beneteau Propeller Shaft Line Cutter Anode for 30mm shafts.

www.getaprop.com

DPW · Mar 16, 2021

Vive la France - that said, love this solution if it works with my cutter. Thanks for quick response!

fstbttms · Mar 16, 2021

DPW said:
Vive la France - that said, love this solution if it works with my cutter. Thanks for quick response!

No, you miss the point. This is an anode with the cutter attached as an integral part. When the anode is depleted you replace the whole thing.

DPW · Mar 16, 2021

I have a different type of cutter on my boat. Can't find a pic but it has a stationary blade and a spinning part that pulls the line into the fixed blade. I will be on the boat this weekend and will get a pic. Thx.

fstbttms · Mar 16, 2021

DPW said:
I have a different type of cutter on my boat. Can't find a pic but it has a stationary blade and a spinning part that pulls the line into the fixed blade. I will be on the boat this weekend and will get a pic. Thx.

You have the "Spurs" line cutter?

DPW · Mar 16, 2021

thats the one!

fstbttms · Mar 16, 2021

Well, unless you want to remove the Spurs (and sell it or whatever). it doesn't sound like the Salca setup is going to be of use to you.

DPW · Mar 16, 2021

so now i have a french boat AND the wrong type cutter - hmmm;-)

thanks for the info!

fstbttms · Mar 16, 2021

DPW said:
so now i have a french boat AND the wrong type cutter - hmmm;-)

thanks for the info!

Davidasailor26 · Mar 16, 2021

You could use a temporary fish style zinc to augment the prop zinc. They need to be connected to ground and taken in and out of the water when slimy, but if the prop zinc isn’t enough it might be worth it for you.

DougM · Mar 17, 2021

fstbttms said:

It doesn’t make any difference if its a French built Beneteau or US built, there simply isn’t space between the skeg and the front of the prop for a shaft zinc more than a half inch in thickness regardless of the diameter.

Mechone · Mar 17, 2021

Add an R&D coupling between the coupling half and it moves the shaft back about 1.2 inches giving you the room and now the advantage of a coupling for alignment , isolating against galvanic corrosion , vibration and overload protection.

DougM · Mar 18, 2021

Mechone said:
Add an R&D coupling between the coupling half and it moves the shaft back about 1.2 inches giving you the room and now the advantage of a coupling for alignment , isolating against galvanic corrosion , vibration and overload protection.

I wonder If there would be enough clearance to prevent my prop in the folded position from hitting the front of the rudder...Not a bad idea for all of the other benefits mentioned by Mechone.

Prop shaft zinc 321

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