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Thread: Johnson "70mod"

  1. #41
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    ahh the Argo 17, i know these boats , they were around a long time ago, very nice boats,
    the panther jack plate is nice and very expensive, certainly not under any pressure with just a 70hp motor.never seen one in the flesh.

  2. #42
    Team Member hupiveneilija's Avatar
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    Try to start 1st time after build, cranks really poor on my old battery even it was fully charged. Will need fresh good battery to start her up, i think have quite much compression😂. Havent measure yet. Have to get that new battery first and try again. If it dont crank enough then have to open those little holes in the cylinders.
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  3. #43
    Team Member LittleCharger's Avatar
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    Quote Originally Posted by hupiveneilija View Post
    Try to start 1st time after build, cranks really poor on my old battery even it was fully charged. Will need fresh good battery to start her up, i think have quite much compression��. Havent measure yet. Have to get that new battery first and try again. If it dont crank enough then have to open those little holes in the cylinders.
    it should crank even with high compression, like you said good battery and also a good starter, check for voltage drop at the battery to start and then work you way through, make sure you have good grounds

  4. #44
    Team Member LittleCharger's Avatar
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    looks awesome !
    Thanks hupiveneilija thanked for this post

  5. #45
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    if that is the head on there with small combustion chambers you probably wont start it without 24 volts.
    I would be doing compression check before starting it up.

  6. #46
    Team Member hupiveneilija's Avatar
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    Quote Originally Posted by LittleCharger View Post
    it should crank even with high compression
    And it did! Got second battery on the side, cranks verywell. Allthoug it didnt start, but I think have solved that. All wires from powerpack to the coils were in wrong order! Had to stop for tonight, getting late. New day tomorrow!

  7. #47
    Team Member hupiveneilija's Avatar
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    Quote Originally Posted by filthy phill View Post
    compression check before starting it up.
    Fire up first then check 😬.
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  8. #48
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    I do hope this runs good for you.
    you have put a lot of work in the motor.

    Be good to hear it run, I hope you have video ready for us to hear the beast running.

  9. #49
    Administrator Ron Hill's Avatar
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    Default Odyssey Battery

    Quote Originally Posted by hupiveneilija View Post
    Fire up first then check .
    http://www.odysseybattery.com/batter...FZ24wAodg6QHIw

    These batteries worked GREAT on our 45 SS, amazing cranking power.

  10. #50
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    I use a banner 75amp with 660 cca. Works a treat.

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