I used the snow thrower the first time this year (model PP1150E27, bought in 2009 only used it the first time now), I saw blue flame came out from the muffler. When I tried to use it in the afternoon, the muffler backfired and would not start. Please advise what the problem is.

31AE662H515 - Mastercraft Snow Thrower (1998) - PartsTree

https://www.partstree.com > models > 31ae662h515-ma...
Mastercraft repair parts and parts diagrams for Mastercraft 31AE662H515 - Mastercraft Snow Thrower (1998)

Finding the Model and Serial Numbers on a Craftsman Two ...

https://www.rcpw.com > how-to > model-id > craftsman
So you need to look up your Craftsman snow blower, but you can't find the model and serial number! Well, we're here to help. Here are a couple of common ...

Your adjustment screw is on the carburetor

POULAN PRO PP1150E27 OWNER'S MANUAL Pdf Download.

https://www.manualslib.com > ... > Poulan Pro Manuals > Snow Blower > PP1150E27 ew in on the carburetor. or check here

If you need further help, I’m available over the phone at https://www.6ya.com/expert/anthony_e4f197748c31eabd

It can be used, although the manufacturer recommends;

Super S 5W-30 Snow Thrower Engine Oil - Sears

www.sears.com/explorer-5w...snow-thrower...oil/p-07188298000P
Sears Rating: 4.5 - ‎5 votes
Oct 21, 2010 - Explorer 5W-30 snow thrower engine oil is a premium formulation for use in all four cycle engines when temperatures are below 32 deg. F. Explorer 5W-30 snow thrower engine oil protects the engine by lubrication, cooling, cleaning and sealing internal moving parts.

They are basic what do you need to Find in the Manual?

the priming bubble can look totally perfect, but all it takes is a pin hole and right around the retaining ring is hard to spot a crack and you should also check fuel lines in tank

I have a Haban Model No. 24577A 42" front mounted snow thrower attachment, which I have mounted to a Murray lawn tractor. I needed to replace the lower drive belt, labeled: V-Belt-Long Part No. 23948 in my Haban manual. I had found it next to impossible to find a replacement belt part number or cross-reference to other brands. I tried many belt sizes and lengths to no avail - belts broke quickly and suddenly after 1 or two uses.

While researching Haban on the internet, I realized that they also supplied snow thrower attachments for Sears Craftsman lawn tractors. A thought hit me at one point in my research... that Haban probably sold the same snow thrower chassis to all manufacturers, but only with different interfaces to the tractors. So I ordered up a belt for a different Haban model that was supplied to Sears, and I think that my intuition was correct!! I have found a belt that works with my Haban Model No. 24577A snow thrower.

The belt that appears to be a direct replacement for the Haban belt part number 23948 (long) is as follows: Kevlar Blue V-Belt 5/8" x 87". It is sold by several suppliers under various part numbers, priced at $20 to $30.

I hope this helps you.

If new call your supplier?

When finished using, turn off the fuel line, there should be a cut off tap?

Be careful you don't get cover in fuel. Play safe!

If there is a leak, most likely a failed seal or loose screw? If attempting yourself, make sure itis turned off and cold, usual safety, no naked flames/cigs/pipes/cigars.matches/ or you could be a Flaming Torch".
Otherwiswise leave it to the suppliers.

check the bearings in the auger sounds like the froze up and now they need to be replaced (the smoking you saw was from the belts slipping on the pullies)..good luck