If I were you I would not waste my money on a craftsman product. I have the exact model you are asking about and it lasted for about 13 months. Now it won't start and the cost to repair is as much as the original cost.
0.020 in or 0.50mm
Fuel mixture is 16:1
http://www.searspartsdirect.com/partsdirect/part-model/Craftsman-Parts/Grass-trimmer-weed-wacker-Parts/Model-536773510/0247/1503820?searchedModel=536.7735.100&blt=
The engine on a 4-cycle Craftsman trimmer is typically manufactured by companies like Briggs & Stratton or other third-party manufacturers. Craftsman often sources engines from these reputable brands to ensure reliability and performance. To confirm the specific engine model, it's best to check the trimmer's user manual or product specifications.
Go to Sears.com, then at the top of the page, click on Parts Direct. A box will appear where you can enter the Model #. On the page that comes up, click "View Manual". A .pdf file will open which you can save to your computer.
Read the owners manual in the link below. It will explain how to restring the trimmer.
The Craftsman model 22081 07199017000P 40-volt hedge trimmer is manufactured by the Stanley Black & Decker company, which produces Craftsman tools under license. Craftsman has a long history of providing reliable power tools and lawn equipment, and their hedge trimmers are designed for both performance and durability. This particular model is part of their 40-volt cordless line, offering convenience and ease of use for users.
The available trimmer lengths for this model are 1mm, 3mm, and 5mm.
Railroad Model Craftsman was created in 1933.
40:1 is the correct mixture for the fuel and 2 cycle oil. 3 oz. of 2 cycle oil per gallon of gas. I have Craftsman Line Trimmer 358.795190 (Model #). It has the quick release shaft for other attachments. Hopefully this will help you.
My craftsman wheeled weedtrimmer (6.0 quantum Briggs and stratton engine; model 917.773704) uses SAE 30 (above 32 degrees F) and SAE 5W-30 (below 32 degrees F). It has 20 oz. capacity.
Depends on the Model of stihl trimmer you have. The 45 home trimmer from stihl takes .080 but from that model to the larger more expensive ones the string size gets larger.