max rpm on 5.7L

Discussion in 'Sterndrives' started by jagrimes, Sep 26, 2006.

  1. jagrimes
    Joined: Sep 2006
    Posts: 1
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    Location: Guntersville,AL

    jagrimes New Member

    What is the max rpm on an 86 5.7l omc cobra? Right now it is turning 3000 max with a raker 14.5x20. We are wanting to reprop to pull skiers better but dont want to over rev while just riding.
  2. Luchog
    Joined: Dec 2005
    Posts: 31
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    Location: Rosario, Argentina

    Luchog Junior Member

    I'm not sure but 3000 seems pretty low, I'd say max RPM for a 5.7L should be between 4400-4800
  3. Titanic
    Joined: Aug 2006
    Posts: 15
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    Location: illinois

    Titanic Junior Member

    I have a 1989, 4.3 liter v/6 omc cobra. My red line is 4400. However with a 14.5 x 19 I can trim up without cavitating and reach 5000 R.P.M.. I hate to say it but if your only getting 3000 R.PM., I think you have a significant problem.
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