Plugs, plug wires, vacuum hoses.
the fuel filter has been changed.
Try checking the fuel injector and carburetor
fuel filter
yes and no did not changed fuel filter
The Sputtering tends to be a old or clogged fuel filter the engine is getting starved of fuel replace that and it should fix the problem
The year, make, model and engine info would help, but I would start with replacing the fuel filter.
Maybe dirty fuel filter.
Dirty fuel filter. Get it changed.
fuel filter,fuel pump low pressure
Possible clogged fuel filter.
I guess I could have explained more thoroughly I have changed the air filter and fuel filter and changed spark plugs and also disconnected the kill swithes on mower to make sure that was not it either plus I changed the oil too
What year S-10 and what engine you have would help.