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I have a 70 hp johnson motor with an aluminum propeller. The propeller is stamped 13 x 19. I have someone that wants to sell me a prop that is stainless steel the size is 13 x 17. Both are 3 blades. Will the stainless one work?
 

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It will work but you will see an extra 300 plus rpm's on WOT which could spell problems....
John
 

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You also need to check and make sure the hub has 13 splines. A hub splined for other than omc won't fit. However there are some exceptions to this and the prop can always be rehubbed. Check with Bauman's Propeller for cost on that.
 

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The stainless blades will not flex as much as the aluminum blades, therefore you will not see a dramatic change in your RPMs. As long as you run that motor at 5800 or less you will fine.
 
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