sounds like you are having the same problem as me! its only the throtle cable thats busted but trying to find a new one is looking grim, so I will be getting a length of cable and two screw stops one for each end just like a brake cable on a p/bike
mick, October 2005
edit
I can answer this question...
where can i buy a throttle for the mccullock trimmac 240/241?