Results 1 to 12 of 12

Thread: 25 hp yamaha 2 cyl 2 stroke

  1. #1
    Join Date
    Sep 2018
    Location
    Somewhere around 213
    Posts
    108

    Default 25 hp yamaha 2 cyl 2 stroke

    anyone know any ways to get some more power out of it without loosing much reliability?
    Last edited by Nstuck; 11-04-2018 at 09:17 PM.
    “My names Thrane Tuck an I don’t give a fuck” - T-bone

  2. #2
    Join Date
    Nov 2013
    Posts
    2,707

    Default 25 hp yamaha 2 cyl 2 stroke

    Plug the compression relief holes or shave the head to raise compression. Either way requires going into the motor. Not much more you can do with them. Finding a 3 cylinder 25/30 will open way more doors than that 2 cyl has. Also modifications when done right will not affect reliability
    Last edited by Gone South; 11-04-2018 at 09:45 PM.

  3. #3
    Join Date
    Dec 2013
    Location
    South Florida
    Posts
    2,423

    Default

    ^ pretty much what he said.

    I shaved the head and put chris Carson reeds in mine. Additionally I'd say make sure you have a good prop. Too much prop will bog those things down.
    "Hunt today to kill tomorrow." - Ron Jolly

  4. #4
    Join Date
    Nov 2013
    Posts
    2,707

    Default

    YOU did all that to yours?

  5. #5
    Join Date
    Dec 2013
    Location
    South Florida
    Posts
    2,423

    Default

    I guess you have much experience with plugging the compression relief holes on a yamaha 2 cylinder? Please elaborate
    "Hunt today to kill tomorrow." - Ron Jolly

  6. #6
    Join Date
    Nov 2008
    Location
    Scumter
    Posts
    21,805

    Default

    Technically, too much prop will bog any motor down.

    What's stock compression on those 2 cyl motors?
    [SIGPIC][/SIGPIC]
    Delta in a nutshell: Breeding grounds + small wetlands + big blocks of grass cover + predator removal + nesting structures + enough money to do the job= plenty of ducks to keep everyone smiling!

    "For those that will fight for it...FREEDOM...has a flavor the protected shall never know."
    -L/Cpl Edwin L. "Tim" Craft

  7. #7
    Join Date
    Nov 2001
    Location
    Green Pond SC
    Posts
    1,441

    Default

    A buddy has 30 Yamaha 2stroke tiller ... he may want to sell. What do those go for?
    “The price of freedom is eternal vigilance” - Thomas Jefferson

  8. #8
    Join Date
    Sep 2018
    Location
    Somewhere around 213
    Posts
    108

    Default

    ill take it off his hands depending on what he wants for it
    “My names Thrane Tuck an I don’t give a fuck” - T-bone

  9. #9
    Join Date
    Jan 2009
    Location
    Murrells Inlet
    Posts
    2,302

    Default

    I have a 1997 25hp 3 cyl have been thinking about trading up. Want a little more HP and a 4 stroke.

  10. #10
    Join Date
    Jun 2008
    Location
    Florence
    Posts
    1,417

    Default

    Quote Originally Posted by scdiver View Post
    I have a 1997 25hp 3 cyl have been thinking about trading up. Want a little more HP and a 4 stroke.
    Long shaft by chance?
    All Men are self made, but, only the successful ones admit it!

    2thDoc "because nothing matters till the games are played and clemson people have enjoyed success and know how to deal with it.

    any other stupid questions?"......Classic!

    CP#96743

  11. #11
    Join Date
    Nov 2001
    Location
    Green Pond SC
    Posts
    1,441

    Default

    Nstuck- check pm
    “The price of freedom is eternal vigilance” - Thomas Jefferson

  12. #12
    Join Date
    Jan 2009
    Location
    In a house
    Posts
    8,437

    Default

    Shave the heck out of it and add washers to the spark plugs!
    "I'm just a victim of a circumstance"

Bookmarks

Posting Permissions

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