QA-36 snow blower part problem.
 

The chain driving the rotor broke today and I can't find a part number or source for a new one. Ideas anyone?

Yes take the chain to a local Farm and Family store or whatever kind of farm store you have and buy a roll of chain and make your own. Pretty sure it #40 chain. Nothing special.

QA36 chain
 

Drive chains should have their size stamped on the side of the links. I don't recall if the QA36 drive chain is #30, or#40, but the correct number should be found on your old chain. I think the length including the master link is 39”. Measure your old one. A local tool and industrial supply here in Maine will cut to order. Modern motorcycle chains generally have “o” ring seals , and I’m not sure that is necessary,or adviseable in this application. Good luck, Steve

Motorcycle chains are usually metric, it uses a stand #40 roller chain not a metric chain.
IH,JD or other farm tractor dealers stock Chain also.

---Don't ever remember a #30 chain
usually 25, (small) 35, 40,42, 50, 60,80, 120. are the common ones
in the roller chain family.
TSC, Family farm/home stores are common suppliers:beerchug:

Thanks guys. It is a #40. A simple fix is with just a master link. I'd like to replace the whole chain but all I can find is 10 foot lengths.

And that is how most chain is sold, in 10' lengths. it is inexpensive chain so no big investment.
FWIW:
if you don't know, the master link clip opening or cotter pin opening (if cotter pin style) should trail the direction of rotation.
Why? so if it contacts an object like a stick it will not be flicked off.
It happens quite often where debris is encountered.
IE: trail or motorcycle biking ---BTDT.

Thanks for the tip on the clip direction, hopefully the snow won't have any junk in it. This blower is on a Model 72 tractor so I can't complain about a chain that lasted 50 years.