260DA 6.2 overheating

Discussion in 'Gas Engines/Drives/Transmissions/Props' started by Happy Dayz, Nov 22, 2017.

  1. Happy Dayz

    Happy Dayz Active Member

    338
    Jun 26, 2017
    Sarasota, FL
    '06 260 Sundancer, 6.2, BIII, Kohler 5kw
    79' classic Kona Family Cruiser jet boat..
    6.2 w/ BIII, 502 w/ Berkekley
    So new pump is in.. going out tomorrow...

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  2. Boater420

    Boater420 Well-Known Member

    Mar 11, 2015
    Clearwater, FL
    '97 330 Sundancer
    V-Drives
    Westerbeke 4.5BCG
    Twin Merc 454's
    Sure looks a lot better. Did it solve the overheating issue?
     
  3. Happy Dayz

    Happy Dayz Active Member

    338
    Jun 26, 2017
    Sarasota, FL
    '06 260 Sundancer, 6.2, BIII, Kohler 5kw
    79' classic Kona Family Cruiser jet boat..
    6.2 w/ BIII, 502 w/ Berkekley
    well damn.. super disappointed... zero change in performance...
     
  4. techmitch

    techmitch Well-Known Member SILVER Sponsor

    May 1, 2008
    Chesapeake Bay, Middle River/Frog Mortar Creek MD.
    1999 270 DA
    Twin 4.3s W/Alpa I Gen II's
    Refer to post 21-24
     
  5. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    What's your engine number ? The hose configuration looks a bit strange to me.
    Open cooling system usually has a feed hose at the bottom of the exhaust manifold and all water exits the elbow.
     
  6. Happy Dayz

    Happy Dayz Active Member

    338
    Jun 26, 2017
    Sarasota, FL
    '06 260 Sundancer, 6.2, BIII, Kohler 5kw
    79' classic Kona Family Cruiser jet boat..
    6.2 w/ BIII, 502 w/ Berkekley
    i did do the flow test somewhat.. i left the hose off the distribution on bottom, started up and it appeared to flow a good amount of water... didnt capture to measure but appeared would meet the 7.5 qts/ 15 sec or close to with flush ears and hose...

    from the outdrive to the raw pump... not connected to pump, with flush ears on hose, flows a lot of water...

    thinking the block is full of crap...
     
  7. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor

    Apr 21, 2009
    PA
    Various
    Various
    You have to time it. There's no way to know without quantifying it. It may be good - but a test is a test is a test. There's no way for us to help without facts. This is a variable that needs to be established/eliminated.
     
  8. techmitch

    techmitch Well-Known Member SILVER Sponsor

    May 1, 2008
    Chesapeake Bay, Middle River/Frog Mortar Creek MD.
    1999 270 DA
    Twin 4.3s W/Alpa I Gen II's
    Any update?
     
  9. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    Happy's not offering up his engine number..... so.. Thinking his open cooled system may have that T restrictor in the mix that will hold the water in his block longer, maybe something's up with that if his system even has one.
     
  10. techmitch

    techmitch Well-Known Member SILVER Sponsor

    May 1, 2008
    Chesapeake Bay, Middle River/Frog Mortar Creek MD.
    1999 270 DA
    Twin 4.3s W/Alpa I Gen II's
    Too busy with important stuff I guess.

    http://www.clubsearay.com/index.php?threads/jl-sub.86722/#post-978259
     
  11. Happy Dayz

    Happy Dayz Active Member

    338
    Jun 26, 2017
    Sarasota, FL
    '06 260 Sundancer, 6.2, BIII, Kohler 5kw
    79' classic Kona Family Cruiser jet boat..
    6.2 w/ BIII, 502 w/ Berkekley
    lol you guys funny...

    yes i had to take a break from the cooling challenge and make myself happy with some audio work...

    plus had a wedding, other family stuff, its on a trailer so to do the test right i need to be in the water

    where do i find my engine number... i am happy to provide for additional support

    spending this weekend out on it having fun on the hook fri and sat, i pay too much not to do so and its not critical

    in a few weeks i plan on taking a few days off and dedicating to a resolution before the water gets hot down here... will try and do water flow test prior but probably pull everything (again) and clean/flush..

    i do appreciate all the assistance and support, you guys are great!! I LOVE my boat!
     
  12. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    On a metal plate above the starter. If your model has a distribution housing there should be a T fitting on the vertical water line, that has a restrictor in it, to direct more water through the block.
     
  13. techmitch

    techmitch Well-Known Member SILVER Sponsor

    May 1, 2008
    Chesapeake Bay, Middle River/Frog Mortar Creek MD.
    1999 270 DA
    Twin 4.3s W/Alpa I Gen II's

    Any updates?
     
  14. Happy Dayz

    Happy Dayz Active Member

    338
    Jun 26, 2017
    Sarasota, FL
    '06 260 Sundancer, 6.2, BIII, Kohler 5kw
    79' classic Kona Family Cruiser jet boat..
    6.2 w/ BIII, 502 w/ Berkekley
    Finally took today to seek again...

    I think I found the culprit!

    Pulled the exhaust all off... began flushing and disassembling hoses.. pulled engine circulating pump.. flushed block.. seemed fine... back to hoses and the fuel cooler inline hose assembly I found a damn piece of an impeller stuck in the orifice ! Had to pull out with long needle nose! .. also spent significant time seeming and flushing exhaust header which had built up gunk and rust chips. . Cleaned dried and spot painted headers.. reassemble ...

    6 hrs tour! Before would overheat on the rabbit ears flushing but held low temp 150... with 140 stat..

    Tomorrow test run!

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    <a href="https://postimg.org/image/4fmg5inud/" target="_blank"><img src="https://s26.postimg.org/4fmg5inud/20180407_160639.jpg" alt="20180407_160639"/></a>
     
  15. Espos4

    Espos4 Active Member

    463
    Jan 1, 2017
    Long Island NY
    2007 240 Sundeck
    350 MAG Bravo 3 W/DTS
    Is that the fuel cooler or the power steering cooler?
    I’m having a bit of trouble figuring out what’s in the pictures.
     
  16. Happy Dayz

    Happy Dayz Active Member

    338
    Jun 26, 2017
    Sarasota, FL
    '06 260 Sundancer, 6.2, BIII, Kohler 5kw
    79' classic Kona Family Cruiser jet boat..
    6.2 w/ BIII, 502 w/ Berkekley
    the fuel cooler... right after the raw pump...

    SUCCESS! finally!

    went through those hoses 2 times previously.. seemed to flow well but this time broke down to each piece...

    she held temp around 158 w/ 140 stat.. 7.5-8psi

    pressure is still low but much improved!!
     

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