1970 Seahorse Issue

Discussion in 'Outboard Maintenance' started by Reel_Karma, Mar 5, 2012.

  1. Mar 5, 2012 #1
    Reel_Karma

    Reel_Karma Striped Fool

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    Uncle gave me a 1970 Johnson Seahorse. Got the motor starting and running very good for sitting over 15 years. Barrel test satisfied and I mounted it on a jon boat to water test...whopping 6.9 mph. I was hoping for a little more speed(Should I be expecting more speed?)
    Getting a new skiff and the 20 hp Yamaha is being traded up, so I am stuck with this motor to power my river/duck boat.

    Any suggestions would be helpful. Getting it running was step 1.

    Thanks
     
    Reel_Karma, Mar 5, 2012
    Reel_Karma, Mar 5, 2012
  3. Mar 5, 2012 #2
    Brett

    Brett > PRO STAFF <

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    Horsepower of engine? :-?
     
    Brett, Mar 5, 2012
    Brett, Mar 5, 2012

  5. Mar 5, 2012 #3
    Reel_Karma

    Reel_Karma Striped Fool

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    20 hp...sorry about that. Compression was checked at 120 for top and 125 for bottom.
     
    Reel_Karma, Mar 5, 2012
    Reel_Karma, Mar 5, 2012
  6. Mar 5, 2012 #4
    Frank_Sebastian

    Frank_Sebastian Well-Known Member

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    Are you sure both cylinders are firing? Those 20 ci engines will run on one, but no power. If both plugs are firing then the carb is the next place I would look.

    Frank_S
     
    Frank_Sebastian, Mar 5, 2012
    Frank_Sebastian, Mar 5, 2012
  7. Mar 6, 2012 #5
    Reel_Karma

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    23 mph today. Checked cylinders last night. going to keep running and see if it stays consistant.

    Thanks
     
    Reel_Karma, Mar 6, 2012
    Reel_Karma, Mar 6, 2012
  8. Mar 18, 2012 #6
    Reel_Karma

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    Got a bad seal somewhere...getting water in the foot
    :mad:
     
    Reel_Karma, Mar 18, 2012
    Reel_Karma, Mar 18, 2012
  9. Mar 19, 2012 #7
    levip

    levip I Love microskiff.com!

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    bummer doesnt that foot have a two piece housing? - theyll be screws in the bottom on both sides
    if so you should be able to get a kit fairly cheaply (20 - 30 bux and theyre pretty straighforward to do....
     
    levip, Mar 19, 2012
    levip, Mar 19, 2012
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