kool keel diesel engine

Discussion in 'Diesel Engines' started by carlos bairo, Sep 28, 2010.

  1. carlos bairo
    Joined: Dec 2008
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    carlos bairo Junior Member

    hi to all'''''
    i like to know if it's better to fit the engine (kubota 28hp diesel) with a
    heather exchanger or with out ,i have a kool keel sistem instalation on
    my boat,up to 30kw area kooling,
    cheers carlos
     
  2. FAST FRED
    Joined: Oct 2002
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    Location: Conn in summers , Ortona FL in winter , with big d

    FAST FRED Senior Member

    The usual reason for keel cooling is to get rid of the second pump and heat exchanger.

    Keep your keel cooling , BUT , install a thermostat in the keel cooling circuit to prevent over cooling. This is common on keel coolers as overcooling can be a problem.

    FF
     
  3. carlos bairo
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    Location: australia

    carlos bairo Junior Member

    FF;; thanks for your reply,i belive that i could fit a normal tractor engine and saving
    on the exstra cost of a marine engine with heater exchange ,dealers on marine motors
    on sydney prefer to sell the complete unit try to persuade my thats the best way to gow luckily to have all your experience people on the forum .
    most regards carlos
     
  4. FAST FRED
    Joined: Oct 2002
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    Location: Conn in summers , Ortona FL in winter , with big d

    FAST FRED Senior Member

    Just dont "save" on a cheapo transmission.

    My suggestion is a Twin Disc , rebuilt ,used from a TD dealer is fine.

    Even a low time running takeout is fine.

    Avoid Hurth ot Velvit drive

    FF
     
  5. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    A keel cooler is a good idea. A tractor engine not so much. By the time you fit a marine gear and fabricate a custom exhaust it will cost way more than a marinized engine.
     
  6. Vulkyn
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    Vulkyn Senior Member

    Wouldnt it also have a lower life span and more problems Gonzo due to marine environment?
     
  7. FAST FRED
    Joined: Oct 2002
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    Location: Conn in summers , Ortona FL in winter , with big d

    FAST FRED Senior Member

    Wouldn't it also have a lower life span and more problems Gonzo due to marine environment?

    Nope until you get into the huge sizes of SHIP engines , most "marine" engines are simply tractor or HD truck engines.

    With a dry exhaust there is no need for a special wet exhaust manifold , simple insulated covering will keep the engine room temps down (120F max).

    FF
     
  8. Vulkyn
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    Vulkyn Senior Member

    So just a radiator then will keep it cool enough, is rust due to salt water an issue ? (sorry dont mean to hijack thread!)
     
  9. apex1

    apex1 Guest

    No,

    the keel cooler unit will. A car radiator rusts away.
     
  10. Vulkyn
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    Vulkyn Senior Member

  11. cthippo
    Joined: Sep 2010
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    cthippo Senior Member

    What is the downside to keel coolers? Are they damage prone? Do you usually have a raw water backup system? What do you use as coolant?
     
  12. FAST FRED
    Joined: Oct 2002
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    Location: Conn in summers , Ortona FL in winter , with big d

    FAST FRED Senior Member

    Are they damage prone?

    Most are mounted where if the boat takes the ground on that side , there clear.

    Also the mounting spot is worked so travel lift slings cant get it.

    Hitting debris the trash is pushed apart bu the bow getting wider, the cooler is usually aft of the max beam of the boat , so out of the debris stream.

    No backup is done as the stock water pump , built into the engine is really reliable.

    The ability in hard freezing areas (the cooling system fluid is 1/2 antifreeze , like a vehicle) to just walk away at days end is a huge plus.Genuine diesel antifreez (not Prestone) is used to extend the engine life.

    Although a bucket is sometimes tossed over the exit of the dry exhaust.

    My preference is for a muffler setup that is REALLY quiet , and doesn't require the pail.

    Look at "Hospital Critical" exhaust systems used in standby gen sets for the idea.

    FF
     
  13. carlos bairo
    Joined: Dec 2008
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    carlos bairo Junior Member

    FRED do i need a heater exchange on a kool keel beta marine engine,
    (kubota) 22hp the kooling area will take up to 30kw engine,it look to my thats
    is similar to the car kooling sistem witout the radiator just the kooling voids
    at the keel.please i need some info about the instalation with dry exhaust,
    best regards carlos
     
  14. FAST FRED
    Joined: Oct 2002
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    Location: Conn in summers , Ortona FL in winter , with big d

    FAST FRED Senior Member

    www.waltergear.com

    Here is an old company that has been creating keel coolers "forever".There are others .

    What is the dry exhaust question?

    FF
     

  15. apex1

    apex1 Guest

    The keel cooling unit is the heat exchanger, what else would you need?

    The exhaust duct has to be heavily insulated to avoid burning your boat, thats it in principle. (really heavy)

    Regards
    Richard
     
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