Zincs on a CD 30C

[Scott]

What "setup" is most commonly used to place a zinc on the prop shaft amoung the CD 30C owners?



ssantoro1@attbi.com

[John R.]

What "setup" is most commonly used to place a zinc on the prop shaft amoung the CD 30C owners?

This has been a highly controversial issue on this board ever since Perry's Boat Harbor in California made the decision to stop producing the "Perry Nut" prop zinc that most of us had used for many years. The Electro Guard or Martyr zincs have become the usual substituted zinc used in place of the Perry by many CD owners. The problem with those zincs is that they tend to have an issue with accidental loosening of the hex cap screw that is supposed to secure the zinc section to the core nut. The screw itself is made of iron which is a problem in the first place. Martyr told me many months ago they were planning on changing the screw to stainless. To this day I see some with iron screws and some with stainless. Anyway, the screw threads are coated with a plastic of some type which is supposed to act like a thread locker. Obviously it doesn't work to well because the zincs have been known to fall off.

I have been lucky to have several Perry Nuts on hand but only have a couple left so I have been searching for a high quality replacement that won't fall off. Camp has made quality zincs for many years and I used them almost exclusively in our marine business back awhile ago. At the time I never came across a need for a prop zinc (aside from Perry) but decided lately to check back with them to see what they might have; lo and behold a nice surprise, they make a very good one. It comes in several shaft sizes. The CD30 uses a 1" model which is called the PN-3; they also make a PN-4 which will also fit the 1" shaft. The difference between the two part numbers is that both will fit a 1" and a 1-1/8" shaft. Both shafts use the same zinc assembly. They just use the two different part numbers to distinguish the difference in shaft size and to confuse everybody.

The zinc is beautifully simple in design and easy and inexpensive to replace. It will not fall off! It is secured with a stainless cotter pin just like the Perry Nut, no screws to come loose and fall out.

The components of the zinc consist of one bronze hex nut, one bronze castellated nut, one zinc collar with integral bronze spacer (washer).

That's all there is to the zinc assembly. The entire cost is about $24 for the PN-3 or PN-4. The replacement zinc runs about $10.

I have one assembly for the 1" shaft. I also have photos of this zinc assembly and can make them available.

You will not find these zincs at common outlets like West Marine, Boat U.S. and others. You will have to order through a local retailer and distributor. Defender or Hamilton may have them available for those people that do not have local chandlers.

[Scott]

John,

Thanks that's great information.

Are the Camp zincs you are refering to the Barrel Zincs?

If so they are available from defender



ssantor1@attbi.com

[John R.]

John,

Thanks that's great information.

Are the Camp zincs you are refering to the Barrel Zincs?

If so they are available from defender

Scott,

The answer is no, it's not even close. The Camp prop zinc is shaped almost like a *collar* zinc but it does not split in halve and it has a spacer washer within the casting. I will e-mail you a couple photos of the zinc assembly. If you have any questions after seeing the pics just post another message.

[John R.]

John,

Thanks that's great information.

Are the Camp zincs you are refering to the Barrel Zincs?

If so they are available from defender

Scott,

The answer is no, it's not even close. The Camp prop zinc is shaped almost like a *collar* zinc but it does not split in halve and it has a spacer washer within the casting. I will e-mail you a couple photos of the zinc assembly. If you have any questions after seeing the pics just post another message.

Scott,
I e-mailed you several pictures to the e-mail address you list and all was returned as undeliverable.

[scott]

John,

Please try again to email information

if att doesn't work try wiltsan@aol.com

Thanks



ssantoro1@attbi.com

[Stan W.]

I used a Camp zinc from Hamilton Marine last summer. There is a bronze fitting that threads onto the prop shaft and is held in place with a cotter pin. This will never fall off. However the zinc is attached to this fitting with a cap screw. The zinc CAN fall off. It happened to me. This year I plan to try some kind of thread locker on the cap screw, maybe just some 3M 101.



smwheatley@capecod.net

[Jeff Schmoyer]

Wow. Stand, do you think you had a very corrosive environment...that is could enoough of the Zinc have "disappeared" so as to slip over the cap screw? Or was the cap screw itself missing?

I have the Camp assembly for my CD27; got it from my local marina (Ocean Gate on Barnegat Bay, NJ). I really like it, but that is worrisome.

Jeff



Jeff.Schmoyer@iff.com

[Stan W.]

I am certain that the zinc was spun off, screw and all. As I said, this year I plan to glue the little bugger in and see what happens.



smwheatley@capecod.net