He's now tired of building up the sector teeth with brazing rod and grinding to fit the pinion (he does it every couple of years IIRC) but now the rack&pinion upgrade is NLA.
I expect to end up like this too. But I have options, such as swapping in the business end of a tiller to substitute for this rather wimpy gear box. But now is not the time to be looking for snowblower parts. This blower is really hardly worth it. With only a 5HP motor, it doesn't throw the snow very far. I paid $75 for it with a bad gearbox (didn't know that at the time), and should maybe have taken the $50 for it the local repair shop offered (for its motor, mostly). If I were employed, maybe I'd just chuck the whole thing. Still, I suppose it's an education. -- Jim