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Tuned up my toro z5035 runs rougher now than before

I tuned up my toro ztr- new plugs fuel filter & oil change. After restarting it it was running real rough so I pulled the plugs & 1 of them had black soot covering the plug. It also blows black smoke from te exhaust. It has a 24hp Kawasaki motor

Posted by Anonymous on

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Posted on Jan 02, 2017

#1 Taper
  • 1040 Answers

SOURCE: toro recycler runs like ****

You will need to disassemble the carburetor and spray with carb.cleaner. Use a Den Tek Brush, (, to clean the small portals and/or the jet in carb. These portals can become blocked. Replace the diaphragm as well. Reassemble and start.

If you need further assistance, just let me know.


Posted on Jun 19, 2009

  • 1 Answer

SOURCE: toro personal pace mower 5 yrs old only runs 10-15 seconds.

Was gasoline left in the tank during off season? Sometimes gas will break down and clog the jets in the carb. The priming bypasses the carb so when you put fuel in by pumping the bulb it runs, but dies becasue no additional fuel is coming through the carb after the primed fuel is burned off. Sounds like you need to clean the jets in the carb and in the future, use Stabil in gasoline to keep it from breaking down.

Posted on Jun 30, 2009

  • 17 Answers

SOURCE: Toro Lawn mower running rough/usually won't start/backfires

You need to check a few things. The spark first, you need to check if it is running correctly, does it have spark, by doing this: take out the spark, put it against a metal surface and pull the pull start if it spark, your good if not you need a new spark plug. Clean out your airfiilter it migth help too. Buy some carb and choke cleaner squirt it up theough the airfilter hole, and start the engine, this will clen the carb. yOU MIGHT NEED TO TAKE OUT THE CARB AND CLENA I OUT THROUGHOULY!!! Try that and it whould work after all these steps!
IN your problem it might also be for some reasons like the crankshaft is bent, that damages the motor internally and cannot be fixed, hppens on older mowers. and is caused by when you run over twigs and branches andything hard!

Posted on Aug 11, 2009

  • 1 Answer

SOURCE: electric starter not working on Toro

I've had the same problem (I think) - the starter will not activate. First time, I found the fuse that's attached to the battery "tray" had corroded. For that I put a good coating of silicone dielectric grease on the fuse contacts and holder. This keeps moisture out. With that it was good for a few months. Now it's gone bad again. This time the fuse is good, but the battery is dead, and so dead that it won't recharge. Apparently the cause of the discharge was/is grass and moisture finding its' way into the battery area, and providing a conductive path between the battery terminals. I was recharging it regularly, following the owners manuals' instructions, so it's definitely not a negligence problem caused by me.
So, obviously what we have is a design flaw in the mower that allows grass clippings to get into the battery area. Time for a recall, but for a quick fix for your current pioblem, you might just find the fuse is corroded, and a replacement + non-conductive grease may be all you need to git'er going.

Posted on Nov 05, 2009

#1 Taper
  • 1040 Answers

SOURCE: mower runs very rough

Sounds like a bad diaphragm in the carburetor.


Posted on Nov 27, 2009

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No problems really,stalls once in a while. Just curious what consists of a tune-up on my engine. what I should replace and so on.

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