Alpha One Gen two Ratio

Discussion in 'Sterndrives' started by dbyers2112, Oct 17, 2015.

  1. dbyers2112
    Joined: Oct 2015
    Posts: 1
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Central Texas

    dbyers2112 New Member

    I have a 1992 Arriva 2050 Runabout. The engine was replaced with a 305 5.0 Mercruiser engine. (Original was a 5.7 350 but that's another story!)

    Well, I had problems with the outdrive upper unit and it needs replaced. The current label says 1.65r and I found one locally as the replacement that is the exact unit but says 1.84r. The guy selling it says that his "boat guy" says it will work fine on my boat. Can anyone tell me if this is true?
  2. CDK
    Joined: Aug 2007
    Posts: 3,324
    Likes: 148, Points: 63, Legacy Rep: 1819
    Location: Adriatic sea

    CDK retired engineer

    I guess the "boat guy" is correct.
    There will be an 11% rise in engine rpm with the original prop. If that is undesirable, a prop with a 10% higher pitch should correct it.
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