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Jeremy, I'd go with the collar zinc.? Your pictures show that you have over 1" of shaft showing between the prop and deadwood of the hull.? Collar zincs do come in a 1" size that will fit in there.
The zinc was always an issue for #328 as when we originally got her there was only about 3/4" of gap there.? This forced me to grind down a 1" collar zinc so it would fit in there.? I never had any issue with water getting into the stern tube/cutlass not that we motored a lot.? When it came time to replace the cutlass & shaft I had the prop shop cut me a shaft that was maybe 1/2" longer than the one we cut out which left me plenty of room to put the collar zinc.? What I heard from the prop shop guy was that for a 1" shaft you don't want much more than 1" between the prop and the cutlass bearing - this was more about not having too much unsupported shaft sticking out beyond the cutlass.? It is not ideal to have the zinc squeezed in there but even with the prop spinning I don't think that water getting to the cutlass was ever an issue for us.
In an ideal world I would use a prop nut that had a zinc outer shell instead but I could never find the right size.? I am pretty sure that they make a zinc like this, that has a captive nut for holding the prop on.? The only issue with this is that perhaps every year (or every other year) you will be changing the prop nut.??
Good luck.
Caleb D
T27 #328,? -----Original Message-----
From: jeremy@... To: [email protected] Sent: Thu, Mar 11, 2021 9:32 pm Subject: Re: [T27Owners] Propeller Zinc Do you think that acorn zinc would work on this setup?
I don't have any extra threads or much clearance. Maybe if the aftmost nut was also a thin one? The other option is a thin collar anode, but there ain't much room between the prop and deadwood either. I've heard that for a 1" shaft, you'd really like to have 1" of space between the deadwood and zinc. But that would mean an exceedingly slim 1/4" zinc in my case. The concern is that if there isn't enough space, the cutlass bearing won't get enough water flow and will overheat. For sailing in and out of the marina, that is fine, but my current cruising plans include a bit of motoring for 8+ hours at a time. On Sun, Feb 7, 2021 at 1:40 PM Steve Bufe <sbufe@...> wrote:
Does anyone have a favorite source for Propeller Zinc's? |
