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I've done all the stuff. New carb gaskets, new exhaust gaskets, new sparkplug, fresh gas, new fuel filter.
Engine starts well, then begins to hunt. Governor lever cycles back and forth. I adjusted the gov setting but problem
continues. Carb has no fuel or other adjustment screws but one on top that doesn't make any changes to engine speed.
I'm open to any and all suggestions. thanks

Can you provide the numbers/ make, model on the engine
How does it run under a load?
Thanks,
Doug Lee
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If the fuel lines are old and rigid, I recommend you replace them with a quality brand Old line will collapse internally.

Also check the fuel tan outlet nipple for any trash caught in there.

From there the carburetor is suspect.

It's fixed. Found that the adj. screw for low idle bottom left on rear of carb was MISSING. I had a carb that came in a repair kit; so, I replaced the carb again and all is OK.
Numbers: Husqvarna YTH21K46 Mod. 960450026 01, Ser. 063011A021729. Engine: Kohler SV610 3213 Ser. 4113815753 21H.P.

Speaking of carburetors; there is a little nylon gromet, bushing, in the governor lever. Some carbs I've ordered have this part, others do not.
I cannot find a part number anywhere for this part. Can anyone offer help? INFO: Kohler SV610 3213 engine.

Hi gbrewer,

That is made to keep excess dust from building up around the top of the shaft. Not all were equipped with them.

Mostly OE had them, and aftermarket just skips putting them on all carburetors.

I'm talking about the nylon gromet/bushing that the gov. linkage rod attaches to the carb lever.

Is it on the actual carburetor itself or the governor arm? Some carburetors have them and some don't.

It fits inside the hole in the governor lever ON the carb; then the gov linkage arm fits in the gromet/bushing.

Governor lever is on the engine, and the throttle lever is on the carburetor. You are mixing up the component terminology.

Here is a picture of what I am talking about. Thank you for your input.

This may help:

gbrewer said:

I'm talking about the nylon gromet/bushing that the gov. linkage rod attaches to the carb lever.

Click to expand...

FOUND IT! Bushing/Gromet Kohler Part Number 25 158 08-S. good luck. Hope you never need one!
Thank you all for your time and consideration.

I think those are kept in the hen's teeth drawer of the parts bin. Never had to find one.
I did not look closely at the posted image, but some carb<>governor links use a thin long spring to keep tension on both ends. If that spring is missing or broken, slop on either pivot point can get the governor to start hunting as it falls behind the rpm response of the engine. One other thing to consider if you have a hunting condition is the freedom of the linkage to move. The linkage should not bind in any position, full or closed throttle. The throttle spring should go to WOT if the manual control is advanced to full throttle position. I am not directing this at you, the OP, but as a general missive.
tom

Carburetor end of governor linkage
Kohler 2515808S
LINKAGE BUSHING

Governor arm to throttle linkage
Kohler 2515811S
Throttle Linkage Bushing

If you see one on another carb and want to try to put it on your carb soften it in hot water to remove and then re-install without breaking.
They are not available as a repl part.
Some engines have a little long tiny spring that fits around the governor/throttle arm and holds the slack when the grommet is not used.
Sometimes you can just live W/O either one.

Forest#2 said:

If you see one on another carb and want to try to put it on your carb soften it in hot water to remove and then re-install without breaking.
They are not available as a repl part.
Some engines have a little long tiny spring that fits around the governor/throttle arm and holds the slack when the grommet is not used.
Sometimes you can just live W/O either one.

Click to expand...

Not avilable? see last post. A serch of the net yeilds many sources.Though I thick they are expensive in the 5-6 dollar range.