volcano sv carb problem
 

my brother-in-law just bought one of these trucks his first nitro rc truck i went over there to help him get started to find out the break linkage was missing the set screw ok no breaks than started the truck up started good ran good but when you went to hit the breaks truck dies ok idle set to low go to adjust the idle scre no movement at all so everytime you hit the breaks the carb sleeve closes all the wau causing thee truck to die no idle adjustment turned it nothing i have many rc trucks nitro and electric and never seen this i was wondering if this is common problem on this truck and what the fix is or is the carb bad thanks