engin running hot

Discussion in 'Mechanic and Repair' started by Mowerboy04, Jun 4, 2006.

  1. Mowerboy04

    Mowerboy04 LawnSite Bronze Member
    Posts: 1,435

    what will cause a engin to run hot?
    thanks
    alex
     
  2. Nosmo

    Nosmo LawnSite Bronze Member
    Posts: 1,216

    Excess grease and dirt buildup on the block. Grass trapped around the cooling fins and shroud. These are a couple of things and one other is not running the engine at the fastest setting.

    Nosmo
     
  3. MowerMedic77

    MowerMedic77 LawnSite Bronze Member
    Posts: 1,164

    First we need to know more about your specific engine (model/spec) this would help us know if you have an air cooled or liquid cooled.
     
  4. Mowerboy04

    Mowerboy04 LawnSite Bronze Member
    Posts: 1,435

    ok i'll get them for u guys in the morning, all i know right now is that its a john deere garden tractor that my negibor gave to me and after cutting my own lawn with it, the engin was red hot. so i'll get the specs for u guys tmmrow
    alex
     
  5. Jim@MilkyWay

    Jim@MilkyWay LawnSite Senior Member
    Posts: 472

    "its a john deere garden tractor that my negibor gave to me and after cutting my own lawn with it, the engin was red hot."
    -------------------------------------------------------------------------
    If you would quit running that dern rocket engine fuel through it, you would'nt have that problem.
    No; seriously, how hot is it getting, really?
    If, for some reason you have way too much heat in those jugs, your motor will, in short order, cook itself if that is not the problem already. Over heating can be caused by too high air-to-fuel mix, by blocked/clogged cooling shroud, no water flow (if applicable), or, by high friction. If friction is your source of heat then it is time to put 'er in the trash pile. Every other cause can be addressed.
     
  6. lawnmaniac883

    lawnmaniac883 LawnSite Silver Member
    Posts: 2,613

    Remove the engine shroud and inspect/clean the cooling fins around the cylinder. I assume this is an air cooled engine because it is on a JD tractor.

    Change the oil and add a synthetic motor oil. If this doesnt help then you should clean/adjust the carb on it because the motor is running too lean.

    I agree with JIM, how hot is red hot?
     
  7. Mowerboy04

    Mowerboy04 LawnSite Bronze Member
    Posts: 1,435

    ok guys sorry it took me so long to get back to u guys. its is running so hot that i can't touch the hood of the tractor. and here is the info on the unit.
    -John deere STX38
    serial no. 1911813768
    Kohler 12.5hp
    serial no. cv12.555-1215
    if u need any more info let me know i used it today to pull my fertilizer spreader and it once again got to the point of not being able to touch the hood.
    thanks
    alex
     
  8. Jim@MilkyWay

    Jim@MilkyWay LawnSite Senior Member
    Posts: 472

    I would _not_ run that engine until you resolve this. You are seriously asking for shrapnel in your eye! Increased friction is directly proportional to increased temperature and vise versa. If she lets go at WOT, then....!!! You did at least supply the info for which RestroRob has pleaded and repeated (see post#3 at top of this forum) until he is blue in the face; what is the model, serial, engine and part numbers, color code, well, maybe not quite.:hammerhead: :drinkup: :usflag:
     
  9. Mowerboy04

    Mowerboy04 LawnSite Bronze Member
    Posts: 1,435

    also it is air cooled
     
  10. FIXDISS

    FIXDISS LawnSite Senior Member
    Posts: 445

    First make sure oil level is ok. Check fan shrowd for debris or blockage to the screen on top of engine including checking hood vents and if applicable the shrowd inside the hood. Check the ehaust pipe and muffler to make sure there is no blockage,no bent pipe or crushed or plugged muffler.If all these are clear then you may have a valve issue. Also are you running engine at low throttle since you are only pulling the spreader ? How many hours and when was oil changed ? Just a few suggestions. I am no expert .
     

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