So I was in the unenviable position of needing a burner for my Hydro Flame/Atwood 8535-III heater. I know others will be (and have been) so I figured I'd post this up for those further me's. It worked but I wasn't going to last forever. The burner I needed was a 32811 which is NLA (No longer available). Atwoods stance is "buy a new furnace". After a ton of research, reading the service manuals, etc. I determined that there are 4 different types of burners. Of those 4 one has larger holes than the III series Only the 85 series III has the center stud w/ the deflector (See pic). The larger BTU units(31/35K) have the short deflector and the 16,20 and 25K use the long long deflector. You cannot find a burner w/ a deflector ANYWHERE. Believe me, I looked. So this leaves you with a few options.
- Option 1 (Known to work) Pry up the folded tabs on your old burner to remove the old screen/brace, purchase PN 30268 (Formerly 36043) and do the same. Swap them, grind away the rivets and cut some of the sheet metal away from the neck of the new burner to mimic the old (See pics) and fold the tabs back over to secure the screen/support. Those tabs were really on there but it is doable.
- Option 2. YMMV but many have said they were able to bolt this right in and it worked. They don't mention the BTU model they have so I cannot really comment on this. You could certainly try this, fire it up and check for misfire or soot out of the exhaust. if it fires up and burns clean call it a day.
It's easy enough to pull the burner out of these things (There are tons of vids if you need help) but you just open the exterior heater door, remove a wingnut, pull out the exhaust, pull 3 spade connectors, disconnect the gas and remove 4 self tapping 1/4" head screws and pull out the burner. R&R. Clean/inspect/adjust the igniter while you are in there. 1/8" gap between ground/electrode is all you need to worry about. AFAIK and from reading the service manual height from ignitor to burner is non adjustable. Mine was a good 1/2" from the burner and lights the first spark each time so don't be worried if it seems to be quite a distance from the burner.
Good luck, it's a very easy job, just make sure to check for leaks at the valve/line with some soapy water when done. It's a tapered seat so it shouldn't leak but better safe than on fire..