Ford 4000 engine surging

[japody]

Been doing a lot of bush hogging lately. Yesterday, as usual, I fueled her up and checked fluids before starting out. She had been running fine prior to this. After about an hour, the engine started surging. Would speed up for a few seconds, then slow back down, did this about every minute or 2. I've had this happen before if she ran out of fuel or the line froze. Obviously not the case this time. I'm thinking it might be water in the fuel. I'm going to get a new fuel filter in the morning and open up the fuel line to check. What do y'all think?

 

[AWSubie]

Check air filter?

 

[RickB]

You are on the right track. Check for a good flow of fuel from the tank. Let a couple gallons run out into a clean jug so you can dump it back in the tank.

 

[japody]

RickB - thanks. I'm hoping it's something as simple as that.