Ignoramus10095 wrote:
I have a Chevy Kodiak dump truck that I am trying to fix.

Pictures of the truck and carburetor are he

http://igor.chudov.com/tmp/Chevy-Kodiak/

(...)

Any ideas what could be wrong? Carb cleanout and rebuild necessary?

Yup. But first, remove the contaminated gasoline
from the tank, pump and lines. Safest would be
to remove the gas tank and have it de-rusted,
cleaned and lined.

--Winston