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  1. #11

    Re: 671tib lost rpms

    Last year maybe ok but how many hours since?
    Pascal
    Miami, FL
    1970 53 MY #325 Cummins 6CTAs
    2014 26' gaff rigged sloop
    2007 Sandbarhopper 13
    12' Westphal Cat boat

  2. #12

    Re: 671tib lost rpms

    Make sure the shut down levers are fully seated by the springs. Yes, that happened to me. The booster spring on our port engine would drag the throttle back so I loosened that up also.
    Regards
    Dan

  3. #13

    Re: 671tib lost rpms

    Not that many hours at all maybe 30

  4. #14

    Re: 671tib lost rpms

    Improvement after changing secondaries, one air filter seems to be full of oil as I took them off to clean and one keeps dripping oil anyone know what this could be?

  5. #15

    Re: 671tib lost rpms

    Quote Originally Posted by captcrunch View Post
    Secondaries were changed last year. I’ll change them again and clean air filters just in case
    Bottom
    Semper Siesta
    Robert Clarkson
    ASLAN, 1983 55C #343
    Charleston, SC

  6. #16

    Re: 671tib lost rpms

    In general.... if the filter is full of oil and the turbo spins freely.... meaning no oil/grease breakdown from bearing, etc.... it could simply be in need of cleaning if it hasn't been done for a while.... You have Walker Air Seps... or somehting else? If Walker Air Seps…. then you actually put oil on those filters to make them more efficient at air filtration...
    JD
    1976 58' LRC Hull #311
    "Miss Maggie"
    Riviera Dunes, FL

  7. #17

    Re: 671tib lost rpms

    Quote Originally Posted by captcrunch View Post
    Improvement after changing secondaries, one air filter seems to be full of oil as I took them off to clean and one keeps dripping oil anyone know what this could be?
    Excessive blow by or stopped up filter drain hose (Air Sep) and/or its check valve. Need to verify turbo drain is open as well.
    Semper Siesta
    Robert Clarkson
    ASLAN, 1983 55C #343
    Charleston, SC

  8. #18

    Re: 671tib lost rpms

    Has a set of k and n filters right off turbo. Pouring here in ny today but hopefully will bayvtest tomorrow and all will be ok

  9. #19

    Re: 671tib lost rpms

    Boat still not exactly right, will not run 100% but then will feel like it should on its own then bog down a little

  10. #20

    Re: 671tib lost rpms

    Airseps have a second filter many people dont change.
    Scott
    41C117 "Hattatude"
    Port Canaveral Florida.


    Marine Electronics and Electrical Products Distributor.

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