Click for Honda Manuals, Parts and Model Guides!
Results 1 to 4 of 4
  1. #1

    Default BF15 Prop Size and Options

    I got a used BF15 at the beginning of the season. It starts first pull and runs great at low to medium high speed. At full speed i am getting cavitation and difficulty keeping on plane. I was told that I may be running the wrong prop. I have a 9x8.25 four blade. Is there an option for a different prop that would give an higher top speed? I currently have a hard time keeping up on plane. I am running an industrial AB 11 ft aluminum hull inflatable. Boat is rated for up to 20 hp.


  2. #2
    Join Date
    Nov 2009
    temecula, ca., usa

    Default Re: BF15 Prop Size and Options

    Here's a parts page link with all thw options from Honda for these outboards.


    (You need to select the prop shaft and propeller box to reach the page I intended...
    sorry for not getting you there directly. My copy and paste skills have never "matured")

    As you can see, your choices are many and more can be found from aftermarket vendors like Michigan Wheel and others.

    All I can really offer as to what you might want to choose (I'm no prop guru) is that you'll probably not want to go bigger in diameter or lower in pitch in order to gain speed.

    But this is all going to be very dependent on other variables like hull shape, proper outboard to transom mounting and how much load you carry and where it's placed.

    If you're not turning the engine at full rpm on plane then you need to find out why. It's not always a result of the wrong prop being run.

    You can, after having all your answers to THEIR questions written down and handy, ask for suggestions from one or more of the aftermarket prop manufacturers. That might help you narrow down your decision.

    I wish you good fortune in your choice.
    Last edited by jgmo; 09-20-2020 at 02:00 PM.

  3. #3

    Default Re: BF15 Prop Size and Options

    Thank you. Now I will have to weigh the acceleration vs top speed. Top speed is more important at this point. Also 3 blade vs 4 blade. Thanks again!

  4. #4
    Join Date
    Nov 2009
    temecula, ca., usa

    Default Re: BF15 Prop Size and Options

    Yeah, the 3 blade should allow for more rpm but I didn't see one listed for that outboard.

    Kind of surprising to me.

    Good luck.

Similar Threads

  1. regular carpet vs padded options, seat options
    By Erupert66 in forum Boat Hull, Deck and Transom Repair
    Replies: 0
    Last Post: 07-23-2019, 07:04 PM
  2. Honda BF15 2003 Idle and Prop problems
    By vanwalsum in forum Honda Outboard Forum
    Replies: 3
    Last Post: 07-18-2018, 07:16 AM
  3. Prop size question and off shore style prop on a through hub exhaust?
    By H2oallyear in forum Propeller Selection and Replacement
    Replies: 0
    Last Post: 07-25-2014, 07:07 PM
  4. Prop options AQ 125a Bayliner
    By overdrivegear in forum Volvo Penta Gas Archive
    Replies: 1
    Last Post: 06-04-2008, 05:24 AM
  5. Prop options bf8a
    By Brian Roe in forum Honda Outboard Archive
    Replies: 2
    Last Post: 04-16-2008, 08:47 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts