What year is my Poulan Model PR18542ST - Poulan Garden

You need the serial number to find the manufacturing date.

POULAN - 530010291 - CLUTCH ASM - Part number 530010291 (POULAN ORIGINAL OEM)

Poulan 3400

http://www.smallenginesprodealer.com/poulan/oem/active/poulan-530010291-clutch-asm-part-number-530010291-poulan-original-oem/

What year is this mower?

American Yard Products (AYP) is the manufacturer and the part number is: 142829 the part the part description shows sub= 145775.

Larry over the years and with different models they move. Please have your saw within easy reach then call Poulan. They better than anyone can answer your question.
Poulan.com/ContactUs
http://www.poulanpro.com/node4033.aspx or phone them
Handheld (Chainsaws, Trimmers, Blowers, Edgers)
1 (800) 554-6723 (Please have your saw within easy reach)
They should provide a link to the correct IPL and Operators Manual for your saw.

Poulan is owned by Husquvarna, who is owned by Electrolux. Give them a chance to help you.

Your saw is a Poulan. Try converting the cc to a model number. A 2.2cc Craftsman is often a Poulan model 2200. go to this link and find something that appears the same under (POULAN-WEED-EATER).
http://www.ordertree.com/cms/illustrated-parts-list/9788.html
The IPL will help. Pay attention to the year there is a different area for older saws.
For a current saw Craftsman should have something available.

Assuming it's prior to 2007 model year: http://www.poulanpro.com/node5782.aspx User manuals, middle of page: http://www.poulanpro.com/node4041.aspx