There is a very real likelihood that this is your problem. Get the engine running and open the throttle by hand a couple of times watching to avoid that generator belt. Then have a partner hit the gas pedal a few times. Does the throttle open to the same degree? .....and, you don't need to be near a Bug shop. Go to one of the on-line suppliers like CIP1 and they will deliver to your door in very short order. Try this and let us know how things work out.