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  1. #1
    New Member mjdupre's Avatar
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    Nov 2007
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    19
    Location
    Chicago(work)/Kentucky(play)
    Tractor
    Yanmar 1500 (Red)

    Default 1500 loses power when hot

    I have a 1500 that starts like a champ but once it gets hot it loses power.
    I suspected the head gasket, coolant looks really dirty shortly after I changed it though I don't see any coolant in the oil.
    Assume that a quick compression test on it may shed some light, though the fact that it starts easy leads me to believe that the compression is fine.

    Anyone have any idea what sort of compression these should have?
    How do you go about checking the compression on a diesel ????? (no seriously how ??)
    Mike
    Give a man a fish and he eats for a day....
    Teach and man to fish and he'll spend thousands on a
    fishing boat, sit in it all day drinking beer and telling lies.

  2. #2
    Super Member kenmac's Avatar
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    Feb 2005
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    5,848
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    The Heart of Dixie
    Tractor
    yanmar 3110D

    Default Re: 1500 loses power when hot

    Quote Originally Posted by mjdupre View Post
    I have a 1500 that starts like a champ but once it gets hot it loses power.
    I suspected the head gasket, coolant looks really dirty shortly after I changed it though I don't see any coolant in the oil.
    Assume that a quick compression test on it may shed some light, though the fact that it starts easy leads me to believe that the compression is fine.

    Anyone have any idea what sort of compression these should have?
    How do you go about checking the compression on a diesel ????? (no seriously how ??)
    Hot as in temp light on hot?? Doubt you have a comp. problem as, you state it starts right up. To check comp. you have to pull injectors. Hoye sells a test kit
    Yanmar 3110D
    07 Dodge 2500 5.9 Cummins
    Husky 372xp
    Husky 55 Rancher
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    16' Tow Master Dump Trailer ,20' Yanmar Hauler

  3. #3
    Elite Member
    Join Date
    Dec 2009
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    2,761
    Location
    gilmer tx
    Tractor
    yanmar 2002d

    Default Re: 1500 loses power when hot

    Crank it cool with the radiator cap off and watch for bubbles in the radiator. Bubbles will indicate a bad head gasket. Is your level in your overflow bottle staying the same? Starting right up is a good indication there is nothing wrong with your compression.

  4. #4
    Super Member clemsonfor's Avatar
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    Sep 2009
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    6,463
    Location
    Greenwood Co., SC
    Tractor
    Yanmar YM2000

    Default Re: 1500 loses power when hot

    how old is your fuel filter?
    YM2000. MF dirt scoop,4' Jbar bushhog,boompole, LMC 12-16 disk harrow, 4' Atlas boxblade (with rippers). 1980 chevy K10,1990 ford ranger 2wd (285K miles),1997 saturn SL2 (twin cam!!),2001Toyota Higlander
    1986 Cobia 177 sunskiff w/1981 Johnson 60 hp
    1991 Javalen 17ft w/same year 150 Johnson GT
    Troybuilt 4 cycle & Echo 2 stroke,cold natured(need carb rebuild),MS390 Stihl, Northern tool pressure washer, mixes water into the oil in the pump(now dead, motor on a tiller). 5000 watt generator.

  5. #5
    Platinum Member
    Join Date
    Jan 2012
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    526
    Tractor
    YM2000

    Default Re: 1500 loses power when hot

    Quote Originally Posted by clemsonfor View Post
    how old is your fuel filter?
    No mention of any loss of Antifreeze. A bad HG. you usally have a Loss of Antifreeze.Out the Exhaust or in the oil. If no loss of Antifreeze and your not pressuring up the Radiator. No mention of that is why I agree with Clemsonfor. Whats up by the way!!!!

  6. #6
    Super Member clemsonfor's Avatar
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    Sep 2009
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    6,463
    Location
    Greenwood Co., SC
    Tractor
    Yanmar YM2000

    Default Re: 1500 loses power when hot

    We don't know if he has antifreeze loss or not, so not knowing that is why I just thinking filter maybe??
    Bad filter will cause loss of power.
    Been doing good, busy here with work. Staying warm in this cool snap?
    YM2000. MF dirt scoop,4' Jbar bushhog,boompole, LMC 12-16 disk harrow, 4' Atlas boxblade (with rippers). 1980 chevy K10,1990 ford ranger 2wd (285K miles),1997 saturn SL2 (twin cam!!),2001Toyota Higlander
    1986 Cobia 177 sunskiff w/1981 Johnson 60 hp
    1991 Javalen 17ft w/same year 150 Johnson GT
    Troybuilt 4 cycle & Echo 2 stroke,cold natured(need carb rebuild),MS390 Stihl, Northern tool pressure washer, mixes water into the oil in the pump(now dead, motor on a tiller). 5000 watt generator.

  7. #7
    Platinum Member
    Join Date
    Jan 2012
    Posts
    526
    Tractor
    YM2000

    Default Re: 1500 loses power when hot

    Staying warm in this cool snap?[/QUOTE]
    Have to. Still about like Sunlight to a Vampire.

  8. #8
    Super Member kenmac's Avatar
    Join Date
    Feb 2005
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    5,848
    Location
    The Heart of Dixie
    Tractor
    yanmar 3110D

    Default Re: 1500 loses power when hot

    Well, he hasn't been back so, I guess it's not too important
    Yanmar 3110D
    07 Dodge 2500 5.9 Cummins
    Husky 372xp
    Husky 55 Rancher
    Maruyama trimmer
    Husky trimmer
    Redmax BP blower
    Toro zero turn
    North Star 4 K PSI pressure washer
    Honda 300 4 trax
    Yamaha Timberwolf
    liquid logic coupe kayak
    16' Tow Master Dump Trailer ,20' Yanmar Hauler

  9. #9
    New Member mjdupre's Avatar
    Join Date
    Nov 2007
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    19
    Location
    Chicago(work)/Kentucky(play)
    Tractor
    Yanmar 1500 (Red)

    Default Re: 1500 loses power when hot

    I'm back!
    Haven't had time to look at it but used it this weekend and same problem.
    Fuel filter is fairly new.
    I noticed that the coolant in the overflow is very black, the oil look good so I don't suspect oil in the coolant.

    I'm thinking it's exhaust in the coolant due to a blown HG. I'll check for bubbles in the radiator next time I'm there.
    Tractor is at a summer home 375 miles away so can't look at it too easily.

    Thanks for all the replies.
    Mike
    Give a man a fish and he eats for a day....
    Teach and man to fish and he'll spend thousands on a
    fishing boat, sit in it all day drinking beer and telling lies.

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