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Old 30 January 2008, 13:54   #1
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Starting prop size

I have just aquired a SS Mirage 19" prop.( reasonable price: new, with hub, nut, tab washer etc. for $200.00) as a spare and alternative pitch to my 17" ally. 4 blade. Anyone got a gut feel for which one to start with, assuming a lightly loaded boat.
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Old 31 January 2008, 04:04   #2
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You will know within a minute of hitting the big stick, so take a wrench along and swop them over at sea to see what difference they make.

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Old 31 January 2008, 18:05   #3
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19" I would say but prop selection is such a black art!!!
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Old 31 January 2008, 19:14   #4
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19 incher now fitted. SS looks a lot prettier than ally but we shall see if it does the job. Hope I do not have to change it out at sea. Has anyone every done this?
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Old 31 January 2008, 20:48   #5
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Swopped quite a few in the harbour - just sitting on the edge of the pontoon with the prop between my feet. Can't see it could be done on my boat at sea safely.
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Old 31 January 2008, 23:31   #6
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It is dificult to change at sea IMHO but it can be done, I found it easier by getting into the water. However, anything more than a slight swell makes the engine leg behave like a 'bucking bronco' and is VERY dangerous. Finally, 'Murphys Law' says that one is guaranteed to drop the nut, washer or split pin overboard, so carry spares in addition to your spare prop!!
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