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  1. #1
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    Berea, KY
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    Cub Cadet RZT 42

    Question cub cadet rzt 42, model 17AE2ACG010 electrical problem

    Ok,

    Mower has 112 hours on it, about 4 yrs old. Today while mowing the engine stopped suddenly, just as if a switch had been turned off. Mower will still crank, but not start. I pulled the plug and cranked it with the plug grounded against the enging block. No spark.

    When I disengage the brake handle and attempt to crank, no cranking and the brake light illuminates.

    When I turn the key on, voltage shows and oil pressure light illuminates (normal).

    I have attempted to remove the seat "box" that has switches underneath it, as I'm reasonably confident it is the seat safety switch, but I have not been able to find ALL of the bolts to remove it and gain access underneath. I can reach in with my finger and push in the switches (both of them) behind the parking brake. But I have not been able to positively locate the seat switch. Every diagram I've seen is for a newer model and shows a switch that does not exist on mine.

    One other possible culprit could be the ignition module. It is easy to gain access to. Is there a way to test it, and rule it out before I spend another 4hrs trying to get at the seat switch?

  2. #2
    Platinum Member
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    Default Re: cub cadet rzt 42, model 17AE2ACG010 electrical problem

    If an interlock, like the seat, was bad it would not crank. Sounds like an ignition problem.
    Bob B.

  3. #3
    Platinum Member OldMachinist's Avatar
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    Southwest Illinois

    Default Re: cub cadet rzt 42, model 17AE2ACG010 electrical problem

    On the RZT the seat switch grounds out the magneto but has no affect on the starting circuit so it would still crank if switch was bad.
    2006 Cub Cadet Z-Force50
    2000 John Deere LX178
    1974 SearsGT18 with 3 point,48"deck,Haban sickle mower and front dozer blade

    2000 Bobcat 453F with steel tracks
    1954 Ford860 with front end loader, 5' brushhog
    1952 Allis Chalmers CA with Woods L59 mower
    1947 Case SC
    1998 Honda ACTY 4WD mini truck
    And too many other small engine tools to list

  4. #4
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    Default Re: cub cadet rzt 42, model 17AE2ACG010 electrical problem

    Quote Originally Posted by OldMachinist View Post
    On the RZT the seat switch grounds out the magneto but has no affect on the starting circuit so it would still crank if switch was bad.
    Makes diagnosis a little harder. Could be interlock or ignition problem.

    Bob B.

  5. #5
    New Member
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    Sep 2013
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    Cub Cadet RZT 42

    Default Re: cub cadet rzt 42, model 17AE2ACG010 electrical problem

    Quote Originally Posted by countryboy385 View Post
    Ok,

    Mower has 112 hours on it, about 4 yrs old. Today while mowing the engine stopped suddenly, just as if a switch had been turned off. Mower will still crank, but not start. I pulled the plug and cranked it with the plug grounded against the enging block. No spark.

    When I disengage the brake handle and attempt to crank, no cranking and the brake light illuminates.

    When I turn the key on, voltage shows and oil pressure light illuminates (normal).

    I have attempted to remove the seat "box" that has switches underneath it, as I'm reasonably confident it is the seat safety switch, but I have not been able to find ALL of the bolts to remove it and gain access underneath. I can reach in with my finger and push in the switches (both of them) behind the parking brake. But I have not been able to positively locate the seat switch. Every diagram I've seen is for a newer model and shows a switch that does not exist on mine.

    One other possible culprit could be the ignition module. It is easy to gain access to. Is there a way to test it, and rule it out before I spend another 4hrs trying to get at the seat switch?

    Ok, More on the saga...

    after several hours of manipulation, managed to remove both switches behind the parking brake. One has 3 wires and is normally closed, but when I push it, all contacts become open. the other switch was normally open, with 2 wire connection points (3 wires -one doubled) and when I pushed it became closed. they appear to be working.

    On the advice of semi-local mechanic, removed ground wire from coil, cranked with plug out and viola...sparks. Put ground wire back on and ... sparks.

    while re-assembling, found broken red wire connection to bottom of carbereutor.... got excited. used butt connector and piece of wire to reconnect it and .... nuttin.

    tried cranking and spraying some starter fluid into carb, motor fires briefly. So I'm suspecting fuel pump now.

    What amazes me is the lack of spark when I initially started this project that suddenly began working.

    Your thoughts

  6. #6
    Platinum Member
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    570

    Default Re: cub cadet rzt 42, model 17AE2ACG010 electrical problem

    Maybe you had multiple problems. A flaky interlock may have started working while you were troubleshooting them. After 39 years in the computer repair field I learned to never ASSUME and sometimes go back to square one again, especially after the symptoms seem to change.

    Bob B.

  7. #7
    New Member
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    Cub Cadet RZT 42

    Default Re: cub cadet rzt 42, model 17AE2ACG010 electrical problem

    you may be right about the interlock. I've checked fuel flow to the pump. good so far. will be checking pump soon (gotta disconnect output). I'll let you know

    Do these vacuum pumps have issues with priming?

  8. #8
    Platinum Member
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    Default Re: cub cadet rzt 42, model 17AE2ACG010 electrical problem

    shouldn't - just make sure your fuel tank cap vents are clear..

  9. #9
    Platinum Member
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    Jun 2004
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    570

    Default Re: cub cadet rzt 42, model 17AE2ACG010 electrical problem

    I ran my 3235 out of gas 1 day, before I replaced the faulty tank sensor, and had a hard time getting it started again. I used several shots of starting fluid before the pump finally primed and started. I keep a close eye on the fuel level now.

    Bob B.

  10. #10
    New Member
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    Berea, KY
    Tractor
    Cub Cadet RZT 42

    Default Re: cub cadet rzt 42, model 17AE2ACG010 electrical problem

    I disconnected the fuel output hos at the carbuertor, fuel is getting to the carb just fine. So i'm pretty sure it's something inside the carb. It looks pretty easy, which concerns me because experience says it's never as easy as it looks. Disassembly tonight.

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