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  1. #1
    New Member
    Join Date
    Jan 2013
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    2
    Location
    Indiana
    Tractor
    Cub Cadet 1250

    Default Cub Cadet 1250 problems PLEASE HELP!!

    So we had a Cub cadet 1250 donated to us and we are going to restore it to use as a show machine. We went to start it and the spark plug isn't getting a spark. and I checked the breaker points and they are fine but I noticed sparks jumping from the engine to the guard that goes around the gas tank. Where do you think we are shorting out at. Thanks

  2. #2
    Platinum Member
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    Mar 2008
    Posts
    666

    Default Re: Cub Cadet 1250 problems PLEASE HELP!!

    might start by removing engine cooling sheet metal cowling to expose head fins and remainder of ignition wiring for any evidence of damage by rodents chewing on wires - and to clean out cooling fins.... Repair/replace any damaged wiring.

  3. #3
    Gold Member
    Join Date
    Mar 2012
    Posts
    449
    Location
    Merrillan, WI
    Tractor
    JD 2020, IH CC 1250, Ariens 926 Snowthrower

    Default Re: Cub Cadet 1250 problems PLEASE HELP!!

    Quote Originally Posted by LavilleFFA View Post
    So we had a Cub cadet 1250 donated to us and we are going to restore it to use as a show machine. We went to start it and the spark plug isn't getting a spark. and I checked the breaker points and they are fine but I noticed sparks jumping from the engine to the guard that goes around the gas tank. Where do you think we are shorting out at. Thanks
    Bad place to have a spark I think. check your wire from the points to the coil for any insulation damage. then check your switch wiring for any damaged wiring. clean up your ground wires (battery to frame inside the battery pan, thick wire from behind the starter bolt to the frame on the front "nose".

  4. #4
    Platinum Member
    Join Date
    Jun 2004
    Posts
    587

    Default Re: Cub Cadet 1250 problems PLEASE HELP!!

    Quote Originally Posted by LavilleFFA View Post
    So we had a Cub cadet 1250 donated to us and we are going to restore it to use as a show machine. We went to start it and the spark plug isn't getting a spark. and I checked the breaker points and they are fine but I noticed sparks jumping from the engine to the guard that goes around the gas tank. Where do you think we are shorting out at. Thanks
    Those sparks mean the engine block is not grounded. There should be a heavy wire or cable somewhere going from the engine block to the tractor frame. To prove that is the problem you could clamp a jumper cable to the frame and the engine. Also on a 1250 check the engine mounts. The engine should sit on 4 rubber mounts attached to 2 rails. The "iso" mounts are notorious for going bad and allowing the engine to settle down between the rails and eventually destroying the aluminum oil pan (been there and done that).

    Bob B.

  5. #5
    Gold Member
    Join Date
    Mar 2012
    Posts
    449
    Location
    Merrillan, WI
    Tractor
    JD 2020, IH CC 1250, Ariens 926 Snowthrower

    Default Re: Cub Cadet 1250 problems PLEASE HELP!!

    Quote Originally Posted by Bob_Bainbridge View Post
    Those sparks mean the engine block is not grounded. There should be a heavy wire or cable somewhere going from the engine block to the tractor frame. To prove that is the problem you could clamp a jumper cable to the frame and the engine. Also on a 1250 check the engine mounts. The engine should sit on 4 rubber mounts attached to 2 rails. The "iso" mounts are notorious for going bad and allowing the engine to settle down between the rails and eventually destroying the aluminum oil pan (been there and done that).

    Bob B.
    Bob...the grounds on the QuietLines are indeed 2 stage as I pointed out above. 1) Battery to frame in the rear battery frame. 2) Front starter bolt to the nose cone. From what I can tell they did that because of the rubber engine mounts. Ground from battery wouldn't get to the engine so 2 connections to the frame are needed to get a ground to the engine...the frame is the link.

    Pull them both off and clean them up...they are both heavy wires but get them shiny and replace. Should take about 10 minutes or so. I still suspect the wire from the points to the coil but one step at a time.

  6. #6
    Platinum Member
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    Jun 2004
    Posts
    587

    Default Re: Cub Cadet 1250 problems PLEASE HELP!!

    Quote Originally Posted by teejk View Post
    Bob...the grounds on the QuietLines are indeed 2 stage as I pointed out above. 1) Battery to frame in the rear battery frame. 2) Front starter bolt to the nose cone. From what I can tell they did that because of the rubber engine mounts. Ground from battery wouldn't get to the engine so 2 connections to the frame are needed to get a ground to the engine...the frame is the link.

    Pull them both off and clean them up...they are both heavy wires but get them shiny and replace. Should take about 10 minutes or so. I still suspect the wire from the points to the coil but one step at a time.
    I agree - pull grounds and check. Ignition voltage jumping from engine block to frame can only mean poor or missing ground. Wiring to points or coil can cause loss of ignition but not the spark jumping he is reporting. A battery jumper cable, as I mentioned, is still the quickest way to prove that is the problem.

    Bob B.

  7. #7
    Gold Member
    Join Date
    Jan 2012
    Posts
    273
    Location
    Brookshire TEXAS
    Tractor
    LS R4047

    Default Re: Cub Cadet 1250 problems PLEASE HELP!!

    sounds to me like the insulation on the high tension lead has broken down and leaking voltage to ground
    2012 LS R4047 , FEL , Backhoe, kingkutter finish mower,68 " rachet rake, Titan skidsteer 72" root Grapple, JD 145,JD166 ........Dodge 3500 cummins, Kenworth w900l Cat powered ...

  8. #8
    Gold Member
    Join Date
    Mar 2012
    Posts
    449
    Location
    Merrillan, WI
    Tractor
    JD 2020, IH CC 1250, Ariens 926 Snowthrower

    Default Re: Cub Cadet 1250 problems PLEASE HELP!!

    Quote Originally Posted by Bob_Bainbridge View Post
    I agree - pull grounds and check. Ignition voltage jumping from engine block to frame can only mean poor or missing ground. Wiring to points or coil can cause loss of ignition but not the spark jumping he is reporting. A battery jumper cable, as I mentioned, is still the quickest way to prove that is the problem.

    Bob B.
    Bob I hear you...my guess is based solely on factory wiring...the only wire near there would be the points wire. Not to say somebody didn't patch something else in there of course. The factory wiring diagram is available via a simple google search (I have it here too if I could figure out how to insert it here).

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