Steve S Posted June 2, 2014 Report Share Posted June 2, 2014 This year I polished up the all the props on the duoprop DPH drive. They are made from I think Nibral (nickel-aluminium-bronze) or something like that, previously they had 'appeared' to have been painted black. I checked the props yesterday, the 3 bladed ones fitted nearest to the leg have gone black while the 4 bladed ones have remained a polished bronze colour. They all appeared to be fairly clean and the props on both legs have changed. So a prop changing colour to black is a new one to me. I'm not sure if I have a got a problem on not, would appreciate your thoughts. Steve Quote Link to comment Share on other sites More sharing options...
duncan Posted June 2, 2014 Report Share Posted June 2, 2014 I don't think nibral props going black in seawater after having been cleaned up is new Steve; but as to whether you have a problem I can't really comment. Over the years there have been lots of nibral dph prop issues for some on forums, and obviously a lot of people who never have any issues. Being the front props I seem to remember that there's a plastic shield/cone in front of the props and it's very important that this is maintained in perfect condition or it can accelerate issues that start with the front props. Quote Link to comment Share on other sites More sharing options...
Adam F Posted June 2, 2014 Report Share Posted June 2, 2014 I'm new to dph props but ours were black when the boat arrived, or at least going black as cc says his turn black after a few weeks or being polished? Quote Link to comment Share on other sites More sharing options...
niggle Posted June 2, 2014 Report Share Posted June 2, 2014 Got it the first time Adam ;-))) fisherman1055 1 Quote Link to comment Share on other sites More sharing options...
Steve S Posted June 2, 2014 Author Report Share Posted June 2, 2014 I hear you Adam . Ok thanks, sounds normal then, I did google it but found nothing, poor choice of search words used I guess. Waste of my time polishing! I assume the 4 blade jobbies will turn at some point as well. Quote Link to comment Share on other sites More sharing options...
Maverick Martin Posted June 2, 2014 Report Share Posted June 2, 2014 Adam my delete finger is now well and truly sore now niggle and Stuie 2 Quote Link to comment Share on other sites More sharing options...
Adam F Posted June 2, 2014 Report Share Posted June 2, 2014 Sorry, how many times did it post? Dodgy wifi connections fault out here in Gozo.... Quote Link to comment Share on other sites More sharing options...
Stuie Posted June 2, 2014 Report Share Posted June 2, 2014 Sorry, how many times did it post? Dodgy wifi connections fault out here in Gozo.... Wifi - is that one of the local brews Adam? Quote Link to comment Share on other sites More sharing options...
Maverick Martin Posted June 2, 2014 Report Share Posted June 2, 2014 Sorry, how many times did it post? Dodgy wifi connections fault out here in Gozo.... 6 or 7 Quote Link to comment Share on other sites More sharing options...
Jim Posted June 2, 2014 Report Share Posted June 2, 2014 I believe it's called Annisette over there ! Quote Link to comment Share on other sites More sharing options...
great white Posted June 2, 2014 Report Share Posted June 2, 2014 As others have said it is normal From new I was told by Volvo to be ready for this to happen My were cleaned up when they were off, we launched ready for Easter afloat, they are now black. Charlie Quote Link to comment Share on other sites More sharing options...
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