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Thread: 67 6hp rude

  1. #1
    Join Date
    May 2014
    Location
    Reno
    Posts
    262

    Default 67 6hp rude

    When I go from a trolling speed directly to wot she dies,choke to restart warm. If I throttle up slowly she runs fine throughout the range.Any insight would be appreciated. Thanks-B
    84 Beachcraft 3.8 229cid 6681735 R drive6683545

  2. #2
    Join Date
    Apr 2010
    Posts
    4,290

    Default Re: 67 6hp rude

    Sounds like you need some carb work and some sync and link.

  3. #3
    Join Date
    May 2014
    Location
    Reno
    Posts
    262

    Default Re: 67 6hp rude

    Thanks Boobie. I am confident in the carb work. Sync and link is the adjustment of the throttle cam,is that correct?
    84 Beachcraft 3.8 229cid 6681735 R drive6683545

  4. #4
    Join Date
    Nov 2011
    Posts
    1,960

    Default Re: 67 6hp rude

    I suppose you have already tried tweaking the slow speed needle a bit toward rich---haven't you? Thermostat working?

  5. #5
    Join Date
    May 2014
    Location
    Reno
    Posts
    262

    Default Re: 67 6hp rude

    Stat is working,I replaced it and it improved my low idle. I did spend quite a bit of time tuning it but I will do that next time out.
    84 Beachcraft 3.8 229cid 6681735 R drive6683545

  6. #6
    Join Date
    Dec 2015
    Location
    maplevalley WA
    Posts
    5,049

    Default Re: 67 6hp rude

    Confirm the carb just begins to open as the line on the cam passes center of the follower roller then yes adjust the slow needle for a smooth idle. Then quickly throttle up if it stalls or hesitates add 1/8 turn counterclockwise and try again. Just keep doing that it should cure the issue. It is always best to error on the rich side. Do you know how old the head gasket is? It can never hurt to put a new gasket on those older engines for gits and shiggles.
    It takes a nickle to go first class!
    If it aint broke dont fix it!!

  7. #7
    Join Date
    Feb 2001
    Location
    Central West Florida
    Posts
    14,560

    Default Re: 67 6hp rude

    Make sure that the ID of the High Speed Jet, located in the bottom center of the float chamber way behind the drain screw, is absolutely clean/clear.
    We occasionally have questions. If you fail to answer, it may affect ours.

  8. #8
    Join Date
    May 2014
    Location
    Reno
    Posts
    262

    Default Re: 67 6hp rude

    Ok will do thank you guys once again. I disassembled the carb twice and the jet was perfectly cleaned.I did not change the HG but I could throw one at it.
    84 Beachcraft 3.8 229cid 6681735 R drive6683545

  9. #9
    Join Date
    Dec 2015
    Location
    maplevalley WA
    Posts
    5,049

    Default Re: 67 6hp rude

    Lightly surface the head on a glass table with 220 grit paper. Swirl it in a figure 8 pattern until it all shines the same the slowly torque it down in at least three steps with a center out bolt pattern. My computer crashed so I lost my repair manuals others here will know the torque specs!
    It takes a nickle to go first class!
    If it aint broke dont fix it!!

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