Need manual for models 316-611D000 S.N.1G205B20008

SOURCE: MANUAL FOR A TROY BUILT RIDING LAWN MOWER

Try this site it is called manuals online . Should find what your looking for , Free.

SOURCE: I have a mtd snow blower for my 1042 cub cadet

The manual that I received with my blower was the Cub Cadet version and very incomplete. You can find an excellent manual from MTD, the maker of the blower, here:
http://www.snowblowerguide.com/snow_blower_manuals.php

SOURCE: I need and MTD owner's manual Model #2 Serial #

You manual can be found here:

http://manuals.mtdproducts.com/mtd/Public.do?model_num=2&serial_num=472612&doSearch=Y

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SOURCE: need a manual for yard machine snow blower, model #31A-260-7310

Assuming that you have a Tecumseh engine on your machine, this should help you out a bit. Tecumseh also has some other very helpful documentation on their TecumsehPower.com website.
http://www.tecumsehpower.com/CustomerService/BSI.pdf