w44vi 17 Posted March 12, 2015 Share Posted March 12, 2015 Dads Boat is have major problems with the props corroding He has a Genesis 320 with twin volvo stern drives with duo props When he brought it he had no problems for approximately 7 years then suddenly had quite bad corroding of the props, he replaced them then less than two years later they are stuffed again! One of the anodes is quite badly eroded the others 5 seem ok Anodes are replaced every time its anti fouled, every two years approx. anodes and props are all volvo factory The boat is not connected shore power It is kept on a marina berth What is likely to be causing the problem ? Link to post Share on other sites
The big T 41 Posted March 12, 2015 Share Posted March 12, 2015 Big steel boat nearby? Link to post Share on other sites
w44vi 17 Posted March 12, 2015 Author Share Posted March 12, 2015 Closest steel boat about 5 boats down Link to post Share on other sites
wheels 543 Posted March 12, 2015 Share Posted March 12, 2015 First thing is, never, NEVER EVER, apply a copper based Antifoul on or anywhere near your Props. One of the biggest mistakes people make is painting the Stern in Copper antifoul right up to the Stern legs. That is too close. You need to be at the very closest, at least 1m away from the Legs.Next thing is, you will(or should) not get 2 yrs from an Anode. An anode should be replaced yearly. Any longer and you likely have too large an anode and it will not be working. Easy way to notice that scenario is if the Anode is coated in a hard white powdery coating. That is Zinc Oxide and insulates the Anode making it ineffective. Make sure that Legs are electrically connected. You may need to couple them via a conductor to the engine block at the same point as your Battery neg connection. Link to post Share on other sites
Kevin McCready 83 Posted March 12, 2015 Share Posted March 12, 2015 How do I check my boat and new solar system is not leaking? Link to post Share on other sites
w44vi 17 Posted March 12, 2015 Author Share Posted March 12, 2015 Legs and approx. 1m around them is the aluminium antifouling, international trilux Link to post Share on other sites
Rats 28 Posted March 12, 2015 Share Posted March 12, 2015 Could be a stray current problem dockside or from the boat itself. Disconnect the bonding wire off a seacock, and apply a multimeter to the bondwire and seacock making sure it is completely disconnected and measure amps anything over milliamp is considered high. If there is current present you can then play with breakers to see if you can isolate the cause of the current. You can also try this with shore power connected if in doubt call in a marine sparky. Link to post Share on other sites
Clive 13 Posted March 13, 2015 Share Posted March 13, 2015 Could also be cavitation. Is the issue around the base of the blades? Link to post Share on other sites
wild violet 38 Posted March 14, 2015 Share Posted March 14, 2015 My old boss had a genesis called equaliser she ate all her leg anodes annually,and we used the proper antifoul. Link to post Share on other sites
Recommended Posts
Archived
This topic is now archived and is closed to further replies.