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  1. Jango
    Thread

    Desireable Max Operating RPM

    I have a 97, Evenrude 90HP V4, Max Operating range is supposed to be 4500 - 5500 rpm. Am currently turning 4800 rpm max with normal lite load,...
    Thread by: Jango, Apr 10, 2009, 2 replies, in forum: Outboards
  2. Jango
    Thread

    Eliminating High Speed Porpoising

    For you Naval Architechs: My 20 ft custom Inboard is starting to Porpoise at 82 mph, 12x15 prop turning 6200 rpm. I have plenty of throttle...
    Thread by: Jango, Jun 8, 2008, 2 replies, in forum: Inboards
  3. Jango
    Thread

    Velvet Drive Problems

    I have a Borg Warner, Velvet Drive 71C, 1:1 Gear. Transmission is turning a 12x16 non cupped prop at 6000 - 6500 rpm, probably less than 10% of...
    Thread by: Jango, Oct 22, 2007, 3 replies, in forum: Inboards
  4. Jango
    Thread

    Flex Plate instead of Flywheel ?

    Can an Automatic trans Flexplate be used instead of a flywheel with a Velvet Drive Trans? I realize proper Engine balance must be maintained,...
    Thread by: Jango, Mar 20, 2006, 7 replies, in forum: DIY Marinizing
  5. Jango
    Thread

    Boat Balance

    This question has probably been asked before, but here goes. I am building a Fast, almost flat bottom , Mahogany Boat , Powered by a modified...
    Thread by: Jango, Aug 22, 2005, 4 replies, in forum: Powerboats
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