Vanishing Zincs
Posted: Wed Oct 19, 2011 5:47 pm
This post is extracted from the C350ia MAILMAN email exchange.
Original question posted by Randy Mattes, Quiet Answer II, Hull 244 "Does anyone have a problem of losing your end shaft Zinc? It seems that every time my diver goes down to clean the botttom the Zinc is gone. Is there any remedy or other type Zinc?"
Russ Peel, Avalon, Hull 150 "Do you mean "gone" as is screw come loose and whole thing fallen off including the screw, or zinc gone because it has been consumed? I fitted a new one earlier this year and after about 4 weeks had an off balance shaft and loud knocking from under my feet. When a diver checked the screw had started to unthread and the anode was swinging loosely around on the end of the shaft. He tightened it up and I haven't had a problem since, but have only run engine for about 5 hours since then. I guess if the screw is unthreading they could use Loctite, I don't know if there is one that can be applied and set underwater."
Randy Mattes "Completely gone - 2nd one this year. I'm using a CMP 204304 which is for a 1" shaft. Do you know the shaft size on a 350? Also, I saw an older post that someone used a collar Zinc which was a Camp P5. I don't see that camp makes a "P" series but they do make a "C" series. Could that just be a typo? "
John O'Connell, Second Wind, Hull 84 "I had electrolysis on the end of my shaft about three years ago and can no longer screw a zinc onto the end. What I use now is a BD-25 donut zinc. It attaches on that small area of shaft between the prop and the hull. I've gotten two seasons on this zinc and probably could get three, except that I haul out every other year to paint the bottom and just change the zinc then. Bonnie Mitchell in Florida told me about it." He also provided the attached photos.
C350IA Webmaster
Original question posted by Randy Mattes, Quiet Answer II, Hull 244 "Does anyone have a problem of losing your end shaft Zinc? It seems that every time my diver goes down to clean the botttom the Zinc is gone. Is there any remedy or other type Zinc?"
Russ Peel, Avalon, Hull 150 "Do you mean "gone" as is screw come loose and whole thing fallen off including the screw, or zinc gone because it has been consumed? I fitted a new one earlier this year and after about 4 weeks had an off balance shaft and loud knocking from under my feet. When a diver checked the screw had started to unthread and the anode was swinging loosely around on the end of the shaft. He tightened it up and I haven't had a problem since, but have only run engine for about 5 hours since then. I guess if the screw is unthreading they could use Loctite, I don't know if there is one that can be applied and set underwater."
Randy Mattes "Completely gone - 2nd one this year. I'm using a CMP 204304 which is for a 1" shaft. Do you know the shaft size on a 350? Also, I saw an older post that someone used a collar Zinc which was a Camp P5. I don't see that camp makes a "P" series but they do make a "C" series. Could that just be a typo? "
John O'Connell, Second Wind, Hull 84 "I had electrolysis on the end of my shaft about three years ago and can no longer screw a zinc onto the end. What I use now is a BD-25 donut zinc. It attaches on that small area of shaft between the prop and the hull. I've gotten two seasons on this zinc and probably could get three, except that I haul out every other year to paint the bottom and just change the zinc then. Bonnie Mitchell in Florida told me about it." He also provided the attached photos.
C350IA Webmaster