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  1. #1
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    Jul 2019
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    Chateaugay NY
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    1977 Johnson 175TL77S pisser

    Hey guys I have this 88 Hydrostream Valero with a Johnson 175TL77S and this motor doesnít have a water pisser or a pressure gauge. Where would I tap into it to get a pisser and pressure? All my other outboards had a hose on the heads but this has those 2 piece water jacketed heads on it and no hoses off the thermostats. This thing is way before my time on Godís green earth so any help is appreciated. Thanks
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  2. #2
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    Jan 2008
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    SUMMERVILLE S.C.
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    i usually tap right thru the top of the block into the water jacket..gives you a pressure port and keeps any air bubbles out of the block

  3. #3
    Join Date
    Oct 2001
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    MIAMI FLORIDA
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    Later models were taped 1/8 pipe in the raised area at the bottom of the exhaust cover on the back of the block,,

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