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Thread: Prop Diameter and Pitch (Aluminum vs. Stainless)

  1. #1
    Member
    Join Date
    Jan 2008
    Location
    Anchorage, Alaska
    Posts
    34

    Default Prop Diameter and Pitch (Aluminum vs. Stainless)

    Can anyone tell me what difference the Diameter and Pitch of the prop I put on my outboard makes?

    Also, could some of you tell me your opinions on the differences between aluminum vs stainless performance or function of props?

    I am running a small 16' with a 25 horse prop. I am looking to buy a couple spare props and am wondering what the difference between all of them are.

    Thanks!

  2. #2
    Member
    Join Date
    Dec 2007
    Location
    North Pole, AK
    Posts
    161

    Default Props

    SS props don't flex and normally if pitch and size are the same the SS will push the boat faster. I ran a SS on my 25hp Merc for 15+ years (on Missouri River) and never had a problem with it. Basically SS prop is hard and stronger but you may shear pins on the shaft if you hit something hard. I personally had hit rock with my 115 hp Merc with a SS and it just bent it up. I personally like the SS over aluminum b/c that have never failed me.
    Good luck,
    Tim

  3. #3

  4. #4

    Default Another web site

    www.piranha.com
    same boat same motor loaded different can change the whole formula.

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