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....