Official Cummins 6cta 450C thread

Discussion in 'Diesel Engines/Drives/Transmissions/Props' started by FeLizDream, Apr 24, 2016.

  1. FeLizDream

    FeLizDream Member GOLD Sponsor

    189
    Jun 28, 2015
    Marco Island Yacht Club, FL
    2001 Sea Ray 400 Sedan Bridge, with engine synchronizer.
    Cummins 6cta 450 HP, prop 22 Lx 23" L cup.
    I just replaced both turbo oil drain pipe and hose (see picture), the other day I was in the engine room cleaning and painting and suddenly notice one of the pipes very rusted at the connection with the hose, I went to Cummins dealer and bought 2, it is just a piece of galvanized pipe, I gave it 3 coats of anti rust paint, and 2 coats of Cummins paint beige, also bought new hoses, easy to replace.
     

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  2. NotHerDecision

    NotHerDecision Active Member PLATINUM Sponsor GOLD Sponsor

    904
    Jun 28, 2016
    Houston, Texas
    2001 Sea Ray 460 Sundancer
    2014 Seadoo 155 LTD
    2105 Seadoo 130 SE
    2013 Mercury Dinghy
    Cummins 6CTA 8.3L
    Felizdream

    Do you happen to have the part number? I’m going to get a couple.

    Thanks

    Josh
     
  3. FeLizDream

    FeLizDream Member GOLD Sponsor

    189
    Jun 28, 2015
    Marco Island Yacht Club, FL
    2001 Sea Ray 400 Sedan Bridge, with engine synchronizer.
    Cummins 6cta 450 HP, prop 22 Lx 23" L cup.
  4. NotHerDecision

    NotHerDecision Active Member PLATINUM Sponsor GOLD Sponsor

    904
    Jun 28, 2016
    Houston, Texas
    2001 Sea Ray 460 Sundancer
    2014 Seadoo 155 LTD
    2105 Seadoo 130 SE
    2013 Mercury Dinghy
    Cummins 6CTA 8.3L
    Thanks. 56 bucks on order.

    Josh
     
  5. manfredr

    manfredr New Member

    15
    Apr 3, 2008
    Westport, CT
    420 Sedan Bridge 2004
    Cummins 450C
    This may be a mute point for you by now. I had to make the aneroid adjustment a few years ago, because my starboard engine was lagging severely (appr. 20 sec) I used Tony's instructions after I bought the special Torx tool to get access to the aneroid. The fix worked like a charm, never had a problem again!
     
  6. ZZ13

    ZZ13 Well-Known Member GOLD Sponsor

    Nov 25, 2009
    Lady's Island, SC
    2001 400 Sedan Bridge
    Cummins 450 Diamond
    Thanks. Mine ended up being a worn turbo. Got it rebuilt and it spools instantly now.
     
  7. ZZ13

    ZZ13 Well-Known Member GOLD Sponsor

    Nov 25, 2009
    Lady's Island, SC
    2001 400 Sedan Bridge
    Cummins 450 Diamond
    I ended up deciding on the SeaKamp version. Around $350 on average from all the online places.
     
  8. ZZ13

    ZZ13 Well-Known Member GOLD Sponsor

    Nov 25, 2009
    Lady's Island, SC
    2001 400 Sedan Bridge
    Cummins 450 Diamond
    F82A178B-0452-4F16-82C1-0568C6CD9FC1.jpeg I am probably going to remove my fuel coolers. Don't need them in the climate where I boat and it's just another place to fail involving salt water. But I do have a question. What is this thing for that's on the tank side of the fuel cooler?
     
  9. my3sons

    my3sons Active Member SILVER Sponsor

    Feb 24, 2009
    Upstate NY (lake Erie)
    2004 400DB, Onan 9 kw Gen, Highfield RIB,
    Cummins 6CTA
    Not sure what it's purpose is, but looks like an adaptor to npt from orfs. Maybe some applications have need to connect something else to that tee?? Mine has it also but I can't think of any reason why it needs to be there on our boats. A 90degree fitting on the hose or just a straight adaptor would be fine.
     
  10. ZZ13

    ZZ13 Well-Known Member GOLD Sponsor

    Nov 25, 2009
    Lady's Island, SC
    2001 400 Sedan Bridge
    Cummins 450 Diamond
    Well I finally did it. After two years of pondering it I dropped the pitch on my 400 Sedan Bridge from 24 to 23 to gain 125rpm at WOT. I was hitting 2625rpm at my normal load, but my normal load is not fully loaded with fuel and water. Plus all my Cummins buddies (both Sea Ray and non Sea Ray owners), as well as sbmar, told me to get to 2750. So there is that. I'll just give her a bit more throttle to make up for the speed loss. Ha!
     
  11. Carpediem44DB

    Carpediem44DB Member GOLD Sponsor

    170
    Aug 18, 2015
    Sanfransico Bay area
    2006 44 DB Sedan Bridge Raymarine E120 radar chart plotter GPS autopilot
    cummins QSC 8.3 500 HD
    I’m probably an inch or so under pitched for optimum performance but I sleep soundly knowing I’m not overloading my engines. Rather buy fuel now instead of an engine prematurely.
     

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