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#1
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The Yamaha Tech line told me that the one like you are describing are called "Black Steel" which have "SOME"" stainless in them. They paint the prop to keep them from rusting, but we all know what happens when the paint wears off. Yamaha polished stainless props cost the same so I don't know why the dealer chose the Black Steel. Also the F-150 (4 stroke) has a v-6 gearcase so yes the prop from the 200 will work. Your friend might want to look for the biggest diameter that he can get to help prevent blow outs.
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1975 V-20 w/1996 225 Johnson 
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#2
08-05-2008, 07:38 PM
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when it comes to stainless, unless you get into the 500 grade (anything less such as 300 ss) then a magnet will stick to it. Most items that are identified as stainless steel is only about 300 grade.
I have the chemicals to do a acid spot test and I can compare it to different test strips to determine what grade stainless it is.
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Tis better to be quiet and thought a fool than open your mouth and prove it!! 1991 V-20 cuddy I/O 350 volvo duo prop, 1998 15ft Grumman 9.9 Johnson  
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