Zero Turn engine Rough Idle

[LawnTiger44]

Hi,

Having a strange issue with Craftsman 22 HP, 42'' zero turn rider mower:

Rough idle. Here is video:

Any ideas ?

 

[Scrubcadet10]

It is surging due to a lean air fuel mixture, meaning you either have too much air entering, or Not enough fuel being supplied.
Has the mower ran good previously? Has it been sitting?

 

[enigma-2]

Try running some Sea Foam through the carburetor.
Mix a double dose in the gas tank, run for several minutes to draw the mix into the carb, then shut off and let it sit.
(Had a snowblower that had to sit for several days to dissolve the clogged jet).