z915b won't turn over or crank when hot
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Thread: z915b won't turn over or crank when hot

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    Angry z915b won't turn over or crank when hot

    Hi. New here and really struggling w/ my z915b. It only has 152 hrs on it, but withing the last year it has refused to start after it is hot (after running for about 30 min to an hour). I talked w/ my local dealership and they said they had never heard of this problem. After cooling off for several hours (meaning 3 or more), it will turn over, crank and run w/ no problems. Does anyone know what is causing this and how to fix it?

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    Keeper of the GTT Cookies dieselshadow's Avatar
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    Is the engine turning over and not firing or is the engine not turning over with the starter?
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    it isn't turning over at all. doesn't click or anything. it's like it doesn't even recognize the key is being turned, but give it a few hours and it'll work just fine.

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    Keeper of the GTT Cookies dieselshadow's Avatar
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    More than likely it's either your PTO switch or the ignition switch causing your issue. There was a thread not too long ago with the same problem and a new switch solved it.

    My PTO switch is a bit hinky once in a while too. I'll be replacing mine. As a matter of fact, the switches are listed on the commonly used parts list for the Zs. They are considered a high wear item.
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    - Jason

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    2720 w/ 200CX FEL
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    thanks. i stopped by my dealership yesterday and talked to one of the mechanics and he said that it was probably one of those. guess i'll spend some money w/ them next week.
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    Next time it does it fiddle with the PTO switch while holding the key in the start position. If it suddenly starts then you know for sure its the PTO switch.
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    Quote Originally Posted by fred80 View Post
    Hi. New here and really struggling w/ my z915b. It only has 152 hrs on it, but withing the last year it has refused to start after it is hot (after running for about 30 min to an hour). I talked w/ my local dealership and they said they had never heard of this problem. After cooling off for several hours (meaning 3 or more), it will turn over, crank and run w/ no problems. Does anyone know what is causing this and how to fix it?
    No clue but mine does the exact same thing.
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    *JOHN DEERE 2038R w/ 220R FEL-72" AUTOCONNECT MMM-270B BACKHOE-8"-16" BUCKET-KBOHC-IMATCH QUICK HITCH w/KBOHTH-BALLAST BOX-42" ARTILLIAN FORKS-FRONTIER RC2060-FRONTIER RB2072-LANDPRIDE CA1556-LANDPRIDE FSP 700-LANDPRIDE PD25-12'-24" AUGERS-EA 60" GARDEN BEDDER-EA 72" HD LAND PLANE-NORTHSTAR 55 GAL SPRAYER-TUFF TOP SCR-44-COUNTYLINE CARRYALL
    *JOHN DEERE Z930M 60" MOD-FULL SUSPENSION SEAT-ZGLIDE SUSPENSION-XTWEEL TIRES

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    Fix that worked for me

    Quote Originally Posted by fred80 View Post
    Hi. New here and really struggling w/ my z915b. It only has 152 hrs on it, but withing the last year it has refused to start after it is hot (after running for about 30 min to an hour). I talked w/ my local dealership and they said they had never heard of this problem. After cooling off for several hours (meaning 3 or more), it will turn over, crank and run w/ no problems. Does anyone know what is causing this and how to fix it?
    I unplugged the safety switch under the seat & put in a bypass jumper (loop) on the connector at the end of the cable. Used 2 crimp style electrical contacts that fit in the connector & crimped them onto a short piece of wire. Used electrical tape to make sure it wouldn't come disconnected. Fifteen minutes of my time & the problem never happened again. I have read threads where the same problem was experienced with Kohler and Kawasaki engines. Mine was a Kohler 24 HP. That tells me that it wasn't the engine itself. I purchased the mower used with 380 hrs on it.

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