Surging that will not go away

E

End_of_Rope

Forum Newbie
I have a Kohler 7000 26 HP. I have replaced the carb, fuel pump and fuel filter. I have adjusted the governor. When I replaced the carb, the problem seemed fixed, but it came back in about 5-6 hours of use. I cleaned out the old Walbro and put it back on with no improvement. The symptoms persist throughout the rev range with perhaps a little improvement at the top end. I have also adjusted the pilot jets with no effect. What else can I try at this point? Is it possible that I have done something to the governor spring or spring attachment points to cause this?

Thanks.
JK.
 
Do you have an open top spout fuel can?

If so could be passing grass, bugs, leaves and water TO the mower tank.

It all starts at the fuel can and spout. Middle spouts are good. Far right is a no-go.

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hlw49 said:
Model and spec no. so we can see what you have. Also, equipment model and serial no.
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It Kohler KT745 V-twin 26 hp. It is at 14-15 years old with around 350 hours on the clock. The gas is pristine with a new fuel filter. The filter is clear and no contamination evident. I am certain there are no restrictions to the gas entering the float bowl.

I will take a look at the block under the shroud. Would this create surging?
 
At 15 years old, you are double past due to de-carbon the cylinders. Need to download your engine manual and read it a couple times. Lots of great tips in there on how to keep her running proper. Valve job wouldn't be out of the question either.
 
End_of_Rope said:
It Kohler KT745 V-twin 26 hp. It is at 14-15 years old with around 350 hours on the clock. The gas is pristine with a new fuel filter. The filter is clear and no contamination evident. I am certain there are no restrictions to the gas entering the float bowl.

I will take a look at the block under the shroud. Would this create surging?
Click to expand...
What about your fuel can spout type?
 
End_of_Rope said:
but it came back in about 5-6 hours of use.
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You have a timed running issue. Check the fuel tank. Should flow like a new one with zero trash in the bottom and in the outlet nipple. Flow test it with some Diesel into a glass jar. Not as flammable as gasoline.

Long shot is a failing ignition coil but 5-6 hours later??? Wouldn't your gas tank/s be dry by then?
 
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