15hp evinrude

Discussion in 'Bubba's Outboards' started by scoremaster, Aug 21, 2007.

  1. scoremaster

    scoremaster New Member

    Messages:
    29
    State:
    western maryland
    i just got my 14ft alum boat and it came with a 15 evinrude outboard

    two things have me confused it has an high speed knob and an low speed knob does anyone have any info on how to work these two items
    it seems a bit confusing to me do you turn the low speed knob clockwise till it stops then back it off or what ?

    tonight was first night in the water for me and the motor it run good ( i guess) for about 1/4 mile then was shut off and we trooled along the bank and docks but when i went to start it again it would start up never get to wide open throttle and then shut off this happened about 8 times then i cord came out of the top ( silly me ) so guess i will get new cord and change plugs and try again but any help would be apprec.

    thanks in advance ,

    Scott
     
  2. Bubbakat

    Bubbakat New Member

    Messages:
    4,532
    State:
    McMinnvill
    Have you got the little vent screw opened all the way on the tank.
    As for the high and low speed settings if its running good leave them alone.
    I,ll post the proper way to set them this evening.
     

  3. Bubbakat

    Bubbakat New Member

    Messages:
    4,532
    State:
    McMinnvill
    This was written up by a friend of mine and I have used it several times but he get the heads up on the proper explanation of how to do it in laymans terms.
    Now you will have to pull the knobs off to do this but it is the proper way to do it.



    (Carburetor Adjustments - Two Adjustable N/Vs)
    (J. Reeves)

    Initial settings are: Bottom high speed = seat gently, then open 1 turn out. Top slow speed = seat gently, then open 1-1/2 turns.

    Setting the high and low needle valves properly:

    NOTE: For engines that DO NOT have a shift selection, obviously there is no NEUTRAL position. Simply lower the rpms to the lowest setting to obtain the low speed needle va /lve adjustment.

    (High Speed) Start engine (it will run pretty rough), shift into forward gear, take up to full throttle. In segments of 1/8 turn, wating for the engine to respond between turns, start turning in the bottom high speed needle valve. You'll reach a point whereas the engine will either start to die out or spit back (sounds like a mild backfire). At that point, back out the needle valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest setting.

    (Low Speed) Slow the engine down to where it just stays running. Shift into neutral. Again in segments of 1/8 turns, start to turn the top needle valve in. Wait a few seconds for the engine to respond. As you turn the valve in, the rpms will increase. Lower the rpms again to where the engine will just stay running. Eventually you'll hit the point where the engine wants to die out or it will spit back. Again, at that point, back out the valve 1/4 turn. Within that 1/4 turn, you'll find the smoothest slow speed setting.

    When you have finished the above adjustments, you will have no reason to move them again unless the carburetor fouls/gums up from sitting, in which case you would be required to remove, clean, and rebuild the carburetor anyway
     
  4. scoremaster

    scoremaster New Member

    Messages:
    29
    State:
    western maryland
    thanks bubbacat

    but now one more question would you know anywhere that i can get a return spring for the starting rope mine broke when the string broke yesterday .

    it is a 1956 15hp fasttwin i have already got ahold of a dealer and they told me they didn't list it anymore but would a newer spring fit ?

    thanks,
    Scott
     
  5. Bubbakat

    Bubbakat New Member

    Messages:
    4,532
    State:
    McMinnvill
    I'll do a parts list check. I may have one or I know this man that is selling out after 40 years of business and he may have one.