HELP ME PLEASE!

Discussion in 'Prop Shop' started by LOUMan, Feb 21, 2011.

  1. LOUMan

    LOUMan Well-Known Member

    160
    9
    693
    Ok I have an 06 gheenoe classic with a 95 2 stroke 15hp Merc. The engine is also mounted on a jackplate. The motor is tuned, new fuel filter, clean carb and adjusted throttle cable. This is on a stock prop. Everyone says they run about 22mph on a similar setup I am only clocking 15. What am I doing wrong?
     
  2. out-cast

    out-cast Well-Known Member

    896
    0
    391
    Where is the jackplate set? What else is in the skiff? Cooler, batteries, livewell? Is any of that weight shifted aft? Post some pics.
     

  3. Gramps

    Gramps Living & Dying in 3/4 Time

    2,558
    31
    903
    What prop are you running, rpm's? Where is the cavitation plate in relation to the hull bottom? What's the compression on the engine? What hole is the tilt pin set in?

    There are many different reasons you're not seeing the same speed as others. Give us some more information and hopefully we can help.
     
  4. LOUMan

    LOUMan Well-Known Member

    160
    9
    693
    stock prop, dont know the rpm's. my cavitation plate is just under bottom of the hull. MY pin is set on 1 and I run it 2 clicks up.
     
  5. noeettica

    noeettica Well-Known Member

    3,676
    106
    2,268
    Lots of gheenoers in Miami


    You could Bring it to the 10 K rally for us to look at it ...
     
  6. LOUMan

    LOUMan Well-Known Member

    160
    9
    693
    Well I dropped the jackplate about an inch and a half. Better hole shot same top end. Again the carb is cleaned and rebuilt, new fuel filter and lines even new lower unit oil... I dont know what else to do. The guy I bought Gheenoe off of had a 9.9 and was doing 17mph alone on boat. I am doing 15 with two people and a trilloing motor on a 15hp..
     
  7. noeettica

    noeettica Well-Known Member

    3,676
    106
    2,268

    What did Sophie Run with the 15 'rude ?

    She did 26 With 2 up running the Yammi 4 Stroke ... 15 Hp
     
  8. levip

    levip I Love microskiff.com!

    212
    0
    391
    noel a two stokes gonna turn less pitch at a higher rpm than a 4 stroke so thats irrelevant if i had to guess he needs to be turning a 9 x 10 or 9x11 prop depending on rpm
    LOUman look on the inside of the hub and give us that number thats there there may be 2 if so give us both of them sounds to me like your either WAY over pitched or WAY under
     
  9. out-cast

    out-cast Well-Known Member

    896
    0
    391
    My center console classic ran 23mph with a 4 stroke Yamaha 15hp.
     
  10. aflatsnut

    aflatsnut I Love microskiff.com!

    114
    0
    341
    Something else to look at is your carb linkage. Is it all the way open at WOT?

    Bob
     
  11. Robert_Baltean

    Robert_Baltean I admit I have a fishing problem.

    101
    0
    341
    [smiley=popcorn2.gif]