I would guess he doesn't want to spend the time repairing a very cheap item that is not worth the repair cost. He would have to charge for the time in locating part machines, taking them apart to see if they were good.........this is a looser
for a business but fine for someone doing a hobby project. Homelite and McCullough haven't made a good commercial item for years, just little homeowner items with short service life spans. I have personally worked on such for friends and
vowed never to do that again. They are cheap throw-away machines with very short service lives. Haven't seen new ones for sale in years think they ran the products into the ground? Many years ago both brands were top-of-the line
but they failed to keep with Stihl, Husky and several other foreign made saws, just a fact.