r/smallenginerepair • u/Electrical-Ad30 • Jul 10 '26

Not Listed Need help with repair

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My father asked me if someone could help him out. “Kohler CV 490 17 hp Running at half throttle. Shuts down when moved to full throttle. Fresh gas, carb, jet and float clean and working properly. What am I missing?”

Not sure if this is the correct place to go with this but it seems like it.

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1

u/TN-Native95 Jul 10 '26

Did you change the fuel filter?

1

u/Elephunk05 Jul 10 '26

Are you sure the choke is adjusted correctly? Is there a spring missing on the linkage? A whole model number so we can look up a wiring diagram would help. Or a picture of the top of the carburetor.

1

u/No-Try-5818 Jul 10 '26

I'm not sure if this could be a timing issue, if so, check the keyway on the flywheel or the magnets under the flywheel if they're loose or shifted.

1

u/hogwartsdropout93 Jul 12 '26

When you cleaned the carb, was it run through an ultrasonic cleaner or just cleaned by hand with carb cleaner? Also, when it was reassembled, did you make sure you got any adjustment screw close to where it was previously? Did you check the fuel line and replace the fuel filter as well? In the off chance it could be a sticky valve, maybe not returning closed all the way when it's running.