Need a new prop (?)

Discussion in 'Prop Shop' started by salt_fly, Jan 10, 2014.

  1. salt_fly

    salt_fly I Love!

    Hello all! I am running a Gheenoe LT25 with a Evinrude ETEC 25HP tiller on the electric jackplate in this post:
    I have a three-bladed aluminum prop which is the standard 10" diameter X 12" pitch I believe. The prop starts to slip when I've raised the motor only about 2 inches. I would like to be able to run with the motor all the way up (another two inches of lift). Would a four-bladed 10" X 13" prop help with this (+/- cupping)? One problem is that I don't have a tachometer, so I don't know what my RPMs are with different props. Thanks for your expert opinions.
  2. mark_gardner

    mark_gardner I Love!

    highly recommend getting a tach so you can get the best performance keeping it close to the upper end of your rpm range based on the average load of gear/people you carry.... I do believe a 4 blade will give you better grip and less likely to cavitate

  3. Bob_Rogers

    Bob_Rogers I Love!


    Works like a charm, easy easy install.