Specifications

Your chances are improved by using the right tool and controlling the workpiece. First,

note the orientation of the throttle plate, and mark the shaft for its exact position. If

you're rebuilding more than one carb, keep the throttle plates paired to them. Set the

carb spigot-up in a carefully padded vice, with the slide removed and the back of the

throttle shaft supported--a wood or plastic screwdriver handle minus the shaft or a piece

of large wooden rod works well. Choose a screwdriver with a precise fit to the screws,

give it a light but firm tap to seat it, and use both hands to apply a short, sharp push-

and-twist. This will usually break the screw loose. If the screw does not break free, try

heating the area with a hair dryer or soldering iron (not a torch or high-temp heat gun!)

and quenching with penetrating oil from a spray can. Back it out two-handed, applying

downward force as you turn, until the staked brass cleans itself up in the steel threads

of the shaft and turns easily. If the screws must be drilled out, bear in mind that a trip to

the machine shop will be cheaper than new carburetors.

Member Fry posted an excellent tip on removing the screws. After carefully drilling the

screw heads and removing throttle springs and stops so that the plates would rotate

fully, he was able to grip the staked tips of the screws with needlenose pliers and back

them out. Thanks, Fry!

When you reassemble, use blue Loctite and restake the screws with locking pliers

(Visegrips) or waterpump pliers (Channel Locks).

To the best of our knowledge, the text on this page may be freely reproduced and

distributed.

Sale of this information is prohibited.