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  1. #1
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    Jul 2011
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    Danville
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    1993 johnson 150 could it be antisyphon valve??

    First off hello to all and thanks in advance for any help i recieve from this. First time here so here is the question. Long story short bought the boat this year i am 3rd owner of this boat. I can start the boat and it will idle fine long enough for me to get it in the water and put my truck up. Run to the first spot i want to fish still fine. Crank the boat it will usually crank and idle fine until i put it in gear. Then it will choke out is the best way to describe it. When i start to crank it again it will idle terrible and still choke out when put in gear will also choke out in neutral if i don't push the choke in repeatedly. I have been searching the forum and have several possible answers. I know my carbs need to be rebuilt. But this boat has ran good until about a month ago. This started all at once in a tournament. We ran to first spot ran good went to leave that spot got a 100yds away it died i wiggle wires and found my bulb was soft so reprimed reseated plug wires and everything worked after that until run to weigh in almost to ramp slowly started losing rpm till throttle handle all way down but but was moving at idle speed and running like it was bogged down. Does anyone believe this could be antisyphon valve over something else. Just the way it was fine one minute then terrible the next leads me to believe it could be trash in that valve or it is just old and not operating properly all the time. Or is this valve something that when it goes it goes not an intermitting

  2. Member
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    Jun 2004
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    Fayetteville Tn.
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    3,556
    #2

    Re: 1993 johnson 150 could it be antisyphon valve?? (alumacraftmvtek)

    I believe I would try a BRP brand bulb before I did much of anything else.....

  3. Member
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    Jul 2011
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    Danville
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    #3

    Re: 1993 johnson 150 could it be antisyphon valve?? (THE WITCHDOCTOR)

    i still have my old primer bulb nothing is wrong with it i just replaced with an atwood in april when i changed all the fuel line from tank to motor. Will put my old one back on to see. Thanks will reply if this fixes it. may get a chance to try tonight.

  4. Member
    Join Date
    Nov 2005
    Location
    West Greenwich RI
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    2,154
    #4

    Re: 1993 johnson 150 could it be antisyphon valve?? (alumacraftmvtek)

    Just put a new Attwood and a Bass Pro in my old Tracker. Both where not worth a piece of S__t . both would allow yoy to blow through in reverse. the BPS one took for ever to prime and had to hold it straight up and down. Then 2 days later the rubber was all strched out and super soft.

    Get an OEM one

    1996 STRATOS 278 V
    1996 Intruder 150 HP
    Model 150GLEDB Serial # 04148601
    1991 335195 Heads
    FICHT Reed Cages
    Chris Carson Carbon Fiber Reeds
    Large Bore Carbs
    Prop Mark Croxton A45 15" X 23 Tempest
    Props Owned/Tested: 23 Renegade, 23 Renegade B&B, 22 Raker, 24 Raker, 24 Raker B&B, 26 Raker, 26 Raker II, 24 Raker II, 23 Tempest, 24 Tempest, 24 Fury, 24 Trophy, 25 Renegade, 27 Renegade, 23 Razor 3.

  5. SC Club Moderator ChampioNman's Avatar
    Join Date
    May 2004
    Location
    Crawfordville, FL/Lake Hartwell, SC
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    72,174
    #5

    Re: 1993 johnson 150 could it be antisyphon valve?? (StratosDadRI)

    Easiest way is to use a portable tank hooked to the motor. If it runs great then the problem is in the boat if not then it is on the motor side.

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