Hope someone can help

[Wazza65]

I have a new Z325E Zero turn JD mower. Bought 2 months ago. 30 hours on it. Mowing today and when I disengaged the mower blades it started surging, like moving the throttle up and down. When a load is put on it, like mowing it does not surge. I cleaned my 5 gallon gas can, went to a different gas station frilled it up, came back, disconnected fuel line from mower gas tank, installed new gas filter, put gas line into gas can a couple inches below gas level, started the mower ran it 10 minutes and it still surged. It is under warranty, so I called the dealer that would be working on it. First thing they said was bad gas. I filled up 3- 5 gallon cans 2 weeks ago and used one can and no problem till today.

It sounds like the pilot (idle) jet is partially blocked. The dealer needs to remove and clean the carburettor. It's a very common fault. Sometimes the jet needs enlarging ever so slightly.

 

[RevB]

I have never used ethanol in anything. When I took it into JD it was surging and had a low volume very faint popping sound. I just mowed 2 acres of my 5 and no surging at all, but the very low volume popping has come back. Monday I will take it back to JD, unless it is a simple fix and someone can tell me how to do it, as I don't want to void the warranty. 200 hundred hours or 3 years.

Now where did the "popping" come from? Wasn't ever mentioned until now.
I'm right over by the airport. Just sayin'.

 

[Timtoo]

Now where did the "popping" come from? Wasn't ever mentioned until now.
I'm right over by the airport. Just sayin'.

Popping mentioned on first page.

 

[mechanicmd]

I have a new Z325E Zero turn JD mower. Bought 2 months ago. 30 hours on it. Mowing today and when I disengaged the mower blades it started surging, like moving the throttle up and down. When a load is put on it, like mowing it does not surge. I cleaned my 5 gallon gas can, went to a different gas station frilled it up, came back, disconnected fuel line from mower gas tank, installed new gas filter, put gas line into gas can a couple inches below gas level, started the mower ran it 10 minutes and it still surged. It is under warranty, so I called the dealer that would be working on it. First thing they said was bad gas. I filled up 3- 5 gallon cans 2 weeks ago and used one can and no problem till today.

Hi, You and everyone else are going to say I'm wrong but I read somewhere if you install the wrong air filter on these engines they will surge. It seems there are two air filters that look similar but one has more pleats in the filter. Just stating what I read. good luck

 

[RevB]

Popping mentioned on first page.

Ah ha....missed it....

 

[macdoesit]

Ok. As you have 2 cylinders, you have to do each one separately.You will need a .005 feeler gauge.Remove both spark plugs. Remove both valve covers. Remove the plastic top shroud so you can turn the flywheel by hand.Take a screw driver that is fairly long and put it in the first spark plug hole and with watching the valves rotate the engine with your hand. You will see the rocker arm push on the valves. So there are 4 strokes to an engine, which is intake, compression, power and exhaust. You want that cylinder to be between the compression and power stroke. So you will see the top valve push down, and the piston will be moving down, the the piston will start to move up, and the intake valve will close. Bring the piston to the top, and just rotate it enough that it just starts to go down. Take your feeler gauge and it should slide in between the valve and the rocker arm. If it doesn’t, loosen off the 10mm nut , while holding the 14mm rocker nut. Rotate the 14mm one just slightly counter clockwise and tighten the 10mm lock nut. Do this until the feeler gauge slides in. Do the second side. Once you have done this, put the valve covers back on, the sparks plugs back in, and for safety, I’m supposed to say put the shroud back on. But what I do is make sure that nothing is around the flywheel (wires etc) and I will test run it to make sure the valves are not clacking. If the engine sounds perfect, I put the shroud back on. Email me direct at dvata@yahoo.com if you need further help

Thank you, if I have any problem, I will email you.

 

[macdoesit]

No surging since back from JD. Popping stopped on its own. Running good so far.

 

[macdoesit]

Mowed 5 acres yesterday, mower ran great.

 

[macdoesit]

Thank you, if I have any problem, I will email you.

Thank you again for the valuable info. Just sent you an email.

 

[shootinsteel]

When you get it fixed let us know what the problem was and did Lowes take care of it for you.