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Post by squideyebarnes on Apr 2, 2007 18:03:03 GMT
Had a brand new prop fitted 12 months ago and ws in water 9 month and it is badly corroded to the point there is no tips on the 4 blades and holes right through the blades  Has anode whitch is working as it has corroded to but no shaft annode any Idears(as the boat yard did not advize to put 1 on) bloody £600 down the drain!!!  |
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Post by dave phillips on Apr 2, 2007 19:49:30 GMT
hello mate
sound like you have a wire broken or a dirty contact or something not conected to the anode circut
have you got a r.d coupling if so you should have a small piece of earth wire across the outside of the r.d coupling from a bolt on the shaft side of the coupling - to a bolt on the gearbox side of the coupling .
also cheack and clean all the points where you have wire the earth leads ( engine -sea cocks -metal tank-steering-rudder and if you have rubber mounts on your engine feet you should have a wire on to your metal engine beds ) all connected to your anode
had the same trouble on the last colvic seaworker ,prop started to pit and corrode so with the the mitchell when i had the boat home for a refit i wired everything i could because as you know anything under water cost lots of money
hope this helps
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Post by squideyebarnes on Apr 2, 2007 20:58:37 GMT
cheers for that dave has been ok for first 6 months was re antifouled in nov then they pull up all the outside mooring chains and lay them 20 foot 2 the side of my boat,loads of thick lenghts for the winter
could it have been them?
cheers Andy
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Post by dave phillips on Apr 2, 2007 21:32:11 GMT
i have never heard of that effecting it like that ,i am quite surprice your prop has gone so fast even if the lenghts of chain's or you have got a bad anode circut ,there is no way your prop should pitted so fast .
if i was you i would get on to the people who made the prop and tell them whats happen and tell them you want the prop tested incase there is something wrong with the metal they used.
also ask some of the other boat owner's around you if there prop's have gone the same you may be able to do somethink about it ,all of you together and get a new prop's
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Post by squideyebarnes on Apr 2, 2007 21:35:44 GMT
thats wot I thought dave will get a pic so you can have a laugh  ;D |
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Post by dave phillips on Apr 2, 2007 21:37:17 GMT
where the prop has pited and coroder is it gone pink
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Post by squideyebarnes on Apr 2, 2007 21:42:24 GMT
dunno m8 the the stailess trim tab has a hole to and its on the side of the chain,I will have a look next time that's boating got offered 6 grand as it is so might sell |
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Post by dave phillips on Apr 2, 2007 21:46:57 GMT
might be time to sell then and get your self a nice new procharter they are doing some briliant deals at the moment
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Post by squideyebarnes on Apr 2, 2007 22:24:33 GMT
I wish missus hastle at the mo |
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Post by squideyebarnes on Apr 4, 2007 20:11:36 GMT
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Post by monkeynuts on Apr 7, 2007 21:01:45 GMT
andy do you have a hydraulic gear box? ? if so you need to fit electro eliminators on you shaft it dont happen on all off them but it seems to bee quite common, also some older mechanical gear boxs can lose continuty though the box in certain places. to check this put a meter across the anode to prop and rotate the prop both ways to see if you lose conection on the meter if so again fit electro eliminators |
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Post by squideyebarnes on Apr 7, 2007 21:04:59 GMT
yes hydraulic gearbox's you mean shaft anode?
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Post by monkeynuts on Apr 7, 2007 21:12:46 GMT
no its like brush gear for your shaft to conect it to your anode,
il try and find a web link
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Post by monkeynuts on Apr 7, 2007 21:30:36 GMT
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