How to replace throttle cable and trigger on my stihl fs 85 weed eater

SOURCE: My Stihl FS 85 Weed Eater gets no fire to the spark plug

older models have a pick up and condenser for spark. newer models have pick up and ignition module. the pick up rust the condensers and modules go bad. first take apart to expose flywheel then ck for rust on flywheel at pick up if rusty clean set pick up clearance to that of a matchbook or ten thousands of a inch.if still no spark change condenser or module.

SOURCE: How much would I charge to replace the throttle cable on a stihl pro fs 85 weed eater

Hi Bruce:
If it were me, I'd get the owner to pay for the part and I'd do it for free. but then I'm retired and always like a project to help with.
I'd suggest that you would charge what you think your time is worth, and if it is more than a shop would charge, probably best just to let them repair it.