Craftsman manuals can be found at ManualsLib.com, as well as ShopYourWay.com and SearsPartsDirect.com, as of 2015. The Craftsman LT100 is a series of mowers consisting of three models, according to TractorData.com. These models are the 917.27639, 917.27268, and 917.27337. If searching on the manual sites for LT1000 only does not return good results, using the correct model number usually helps find the correct one.
The first step in finding the correct Craftsman manual is to determine which model the lawn tractor is. On the LT1000 series, the model number should be located on a sticker under the seat, next to the serial number. The model number should begin with the numbers 917.
Depending on which model the lawn tractor is, the manual can be found at one or more of several different sites. SearsPartsDirect.com and ManualsLib.com both have comprehensive lists of searchable Craftsman manuals. In addition the manuals, Sears makes it possible to see the actual parts associated with the model, if any are available for sale. Sears also show detailed parts diagrams that can assist a shopper to determine what they need.
Additionally, while TractorData.com does not offer manuals, they do show engine and transmission overviews for two of the LT1000 models, the 917.27337 and 917.27268. They also offer tractor comparisons, links to tractor articles, and information on tractor shows.