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2006 John Deere Z-757

Discussion in 'Mechanic and Repair' started by Southern Delight, Oct 22, 2012.

  1. Southern Delight

    Southern Delight LawnSite Member
    Posts: 3

    Okay, So Back in 2006 I bought 5 JD 757's. I put 4 in service and kept one at my house. The 4 put in service are long gone, very good machines and money well spent. The one I keep at my house has pretty much been my baby, now just hit 400 hours. I havent done anything to it but put belts on it and changed the oil. It has a Kawasaki 25 hp and a 60 inch deck.

    Well it ran flawlessly until today when I had the bright idea to run sea foam through it, as I have never cleaned the carb. Well after injecting the sea foam with the engine running, into the carb, I waited until it bogged down and shut it off. I waited like 15 minutes to let it soak and tried to restart. Sounds like it jumped timing. It will run very ragged for about 5 seconds and then shut off. I think I screwed something up but turning it off and letting it soak. I pulled the valvecovers and everything seems fine, no bent push rods and everything is nice and tight. I find it improbable that something like the fuel pump or coils failed at this precise moment, but im not ruling anything out.

    Has anyone else come across this issue?
     
  2. LawnCareNoobie

    LawnCareNoobie LawnSite Senior Member
    Posts: 434

    No, what made you do that? lol

    I had a 757 for a while and I loved the machine. I traded it in for a 925. I wish they still made the horizontal engine setup.
     
  3. Southern Delight

    Southern Delight LawnSite Member
    Posts: 3

    Best mower I have ever owned next to my Hustler Z's. Im going to go ahead and disassemble everyhtin g tomorrow and see what I screwed up. I plan on keeping this oldie for a few more years.
     
  4. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024


    Good question....


    Hmmm...... My guess is this crap cleaned all the carbon off the heads and pistons and stick it to the valves and seats (holding valves from seating), Head and valve removal may be in your near future.

    The only thing sea foam is good for is, Taking up space on store shelves......
     
  5. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    Are your sparkplug fouled ? The stuff doesn't burn too well...
    I'm guessing you just poured it straight down the carb..
    Might have gotten a bunch in the carb bowl through the vent making the fuel unburnable....
    Just a guess....
    Posted via Mobile Device
     
  6. Southern Delight

    Southern Delight LawnSite Member
    Posts: 3

    I guess thats possible, but as much fuel as I have cycled its fairly improbable. I called retreat and called my Deere Dealer. They came and picked it up today, told them to make it new again. Problem solved. Thanks for the help though guys!
     
  7. joe billy

    joe billy LawnSite Member
    Posts: 35

    Cmon now, you over rationaized the problem and didn't even check the sparkplug condition.
    You wimped out, the only advice I can give now that JD has your mower is,
    WATCH YOUR WALLET.
     
  8. teckjohn

    teckjohn LawnSite Senior Member
    Posts: 258

    looks like they are a paying customer
     
  9. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    If that's all you have to offer...go back under the shadetree and ..:drinkup::drinkup:
     

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