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  1. #21
    Gold Member Oldtractorfixer's Avatar
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    Mar 2012
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    293
    Location
    Oregon City, Oregon
    Tractor
    several

    Default

    I prefer a curved stack. A straight stack even with a noisy flapper puts out soot when you start it cold which then lands on the hood. Even when it is parked inside.

  2. #22
    Veteran Member
    Join Date
    Sep 2009
    Posts
    2,327
    Location
    Up State S.C.
    Tractor
    AC WD 34 hp/3500 lbs MF 261 60 hp/5380 lbs

    Default Re: Curved exhaust versus flapper

    Quote Originally Posted by stuckmotor View Post
    Has anyone ever stuck an engine because their tractor was left out with an uncovered exhaust pipe that had a curved end? How about with a flapper? I've already gotten one motor stuck and don't want a repeat performance.
    Stuckmotor
    I goofed with my original question. My main intent, was to find out whether the curved exhausts kept out water if they didn't have a can on top. I've never owned one, and couldn't see any other reason for the curve.

  3. #23
    Elite Member
    Join Date
    Sep 2009
    Posts
    4,457
    Location
    Murray, KY
    Tractor
    265 MF / JD 310B Backhoe

    Default Re: Curved exhaust versus flapper

    I have one each and trust the curved option better in limbs but both seem to work OK.

  4. #24
    Platinum Member
    Join Date
    Feb 2011
    Posts
    828
    Tractor
    Furakawa 351

    Default Re: Curved exhaust versus flapper

    Even with a curved pipe when the wind blows the rain will get in. It destroys the muffler, usually the muffler has a drain hole so nothing gets into the engine.

  5. #25
    Elite Member CobyRupert's Avatar
    Join Date
    Oct 2012
    Posts
    2,533
    Location
    Washington County, NY
    Tractor
    JD 5075E

    Default Re: Curved exhaust versus flapper

    What can go wrong with a flapper? Bought a new JD 5075 last summer, first thing I did was take a saws-all on the curved stack and put a flapper on it.
    JD5075E, Frontier RC2084 Rotary Cutter, Wallenstein FX65 Skidding Winch

  6. #26
    Super Member Scooby074's Avatar
    Join Date
    Aug 2006
    Posts
    6,560
    Location
    Nova Scotia
    Tractor
    BX 25, ZD 326

    Default Re: Curved exhaust versus flapper

    Quote Originally Posted by CobyRupert View Post
    What can go wrong with a flapper?
    As long as gravity still works, and it's not rusted in place, nothing!

  7. #27
    Veteran Member MHarryE's Avatar
    Join Date
    Feb 2009
    Posts
    1,939
    Location
    Northeastern Minnesota
    Tractor
    JD 7720; Kubota M135GX, NH TS115A; JD 6230; Kubota L6060

    Default

    Worked on engine applications for 3 major manufacturers during my career. All at one time used flappers. All had excessive customer complaints - flappers fail due to vibration, seizing open, major amounts of water get into engine muffler drain can't handle. All now have curved exhaust. Major thing to remember is covering if hauling with end facing direction of travel because in theory air is spinning turbo which is not lubricated if engine isn't running but I couldn't verify any warranty hits where this actually happened but I have turbo warranty hits so it is possible. I tape over mine just for safety. Flapper failure main complaint actually was the mess created when an engine is started after water has been sitting in the muffler. That sooty mess, when dried, is nearly impossible to get off without taking paint with it.
    JD7720; KubotaM135GX; NH TS115A; JD6230; KubotaL5740

  8. #28
    Veteran Member
    Join Date
    Sep 2009
    Posts
    2,327
    Location
    Up State S.C.
    Tractor
    AC WD 34 hp/3500 lbs MF 261 60 hp/5380 lbs

    Default Re: Curved exhaust versus flapper

    Quote Originally Posted by Johnp33 View Post
    Even with a curved pipe when the wind blows the rain will get in. It destroys the muffler, usually the muffler has a drain hole so nothing gets into the engine.
    Thank you, John. That was quite helpful.

  9. #29
    Veteran Member
    Join Date
    Sep 2009
    Posts
    2,327
    Location
    Up State S.C.
    Tractor
    AC WD 34 hp/3500 lbs MF 261 60 hp/5380 lbs

    Default Re: Curved exhaust versus flapper

    Quote Originally Posted by MHarryE View Post
    Worked on engine applications for 3 major manufacturers during my career. All at one time used flappers. All had excessive customer complaints - flappers fail due to vibration, seizing open, major amounts of water get into engine muffler drain can't handle. All now have curved exhaust. Major thing to remember is covering if hauling with end facing direction of travel because in theory air is spinning turbo which is not lubricated if engine isn't running but I couldn't verify any warranty hits where this actually happened but I have turbo warranty hits so it is possible. I tape over mine just for safety. Flapper failure main complaint actually was the mess created when an engine is started after water has been sitting in the muffler. That sooty mess, when dried, is nearly impossible to get off without taking paint with it.
    Thank you, Harry. My WD must have had too small a drain or none at all . The MF doesn't have a turbo.

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