Results 1 to 14 of 14

Thread: Merc. 40 jet, Kenai Legal?

  1. #1

    Default Merc. 40 jet, Kenai Legal?

    Thinking about getting a new boat and want a Kenai legal jet with the most possible power allowed. This question is tricky due to how the regulation reads "power at the prop shaft". Let me know what you think, or other suggestions.

  2. #2
    Supporting Member Old John's Avatar
    Join Date
    May 2010
    Location
    Wasilla
    Posts
    1,481

    Default

    50HP is max.. regardless of jet or prop, the power head can only be rated at 50HP.. to get a 40HP jet, you'd have to use a 60HP power head and that's a no-no! A 50HP power head would give you a 28 - 33 HP jet... theoretically!

  3. #3
    Member c6 batmobile's Avatar
    Join Date
    Apr 2011
    Location
    Interior
    Posts
    2,101

    Default

    Quote Originally Posted by Old John View Post
    50HP is max.. regardless of jet or prop, the power head can only be rated at 50HP.. to get a 40HP jet, you'd have to use a 60HP power head and that's a no-no! A 50HP power head would give you a 28 - 33 HP jet... theoretically!
    +1 here. The way the reg reads pretty much says 50 max. All new motors HP are measured at the prop so if it says 50 on the motor that means there is 50 in the water. Back in the 80's and early 90's HP was measured at the flywheel so everything was 5-10 higher on the motor than what you were actually getting.
    Makin fur fins and feathers fly.

  4. #4

    Default

    Yeah, most manufactures post their power head HP as well as jet power but Merc only post jet power. It is pretty obvious though that it must be a 60hp motor just looking at displacement spec.

  5. #5
    Member Bsj425's Avatar
    Join Date
    Oct 2009
    Location
    North Pole, Alaska
    Posts
    1,060

    Default

    get you a 60 jet and slap 40hp stickers on it and you will be good to go

  6. #6

    Default

    Quote Originally Posted by Bsj425 View Post
    get you a 60 jet and slap 40hp stickers on it and you will be good to go
    If you are going to lie and cheat, why stop at 60? Why not just get a 150 and put a 50hp sticker on it?

  7. #7
    Member Bsj425's Avatar
    Join Date
    Oct 2009
    Location
    North Pole, Alaska
    Posts
    1,060

    Default

    I was joking i guess my sarcasam was lost in the internet. IT would be funny to see a big 250 hanging off the back of a boat with some 35hp stickers on it

  8. #8

    Default

    I was just adding a bit to yours.

  9. #9
    Member
    Join Date
    Jan 2007
    Location
    Juneau
    Posts
    2,127

    Default

    Used to be easy to do for small lakes that had 10 hp limits. I have had two motors that were 15's that I swapped stickers on to 9.9.

  10. #10
    New member
    Join Date
    Feb 2004
    Location
    Soldotna
    Posts
    5,639

    Question

    Not sure about all this, but isn't the real issue 4-cycle versus 2-cycle?


    Is any motor, up to 50 hsp. okay if it's 4-cycle?

  11. #11
    Member c6 batmobile's Avatar
    Join Date
    Apr 2011
    Location
    Interior
    Posts
    2,101

    Default

    Quote Originally Posted by Marcus View Post
    Not sure about all this, but isn't the real issue 4-cycle versus 2-cycle?


    Is any motor, up to 50 hsp. okay if it's 4-cycle?
    You can still use 2 stroke as long as its direct injection like the new evinrudes.
    Makin fur fins and feathers fly.

  12. #12
    Supporting Member Old John's Avatar
    Join Date
    May 2010
    Location
    Wasilla
    Posts
    1,481

    Default

    Quote Originally Posted by Marcus View Post
    Not sure about all this, but isn't the real issue 4-cycle versus 2-cycle?


    Is any motor, up to 50 hsp. okay if it's 4-cycle?
    Yes, but that wasn't the question exactly. the man wanted to know if a 40 hp jet was legal, the only way to get that would be with
    a 60HP outboard.. 60HP obs are no-no.

  13. #13

    Default

    Attachment 69358
    The attachment is a copy of the reg.


    Don't be fooled by this, as you can not dipnet from any non direct injection 2 stroke even below RM4, they put that in the dipneting regs not the boating regs.

  14. #14
    Member c6 batmobile's Avatar
    Join Date
    Apr 2011
    Location
    Interior
    Posts
    2,101

    Default

    Quote Originally Posted by theronwillard View Post
    Attachment 69358
    The attachment is a copy of the reg.


    Don't be fooled by this, as you can not dipnet from any non direct injection 2 stroke even below RM4, they put that in the dipneting regs not the boating regs.

    Word to that. Ive seen people get cited for this. I understand wanting to keep the water clean but that junk is all salt water/brackish anyway. You can run the motor legally about 1 mile down all day long. Oh well. Get your butt a 4 stroke or direct inject 2 stroke 50hp or under.
    Makin fur fins and feathers fly.

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
  •