gail, trouble shooting pressure washer small engine will not fire. You will have to test the engine for fuel/air/spark/compression and see what is missing/faulty. Check the attached links,instruction and guides, Good luck
I hope this helped you out, if so let me know by pressing the helpful button.
http://www.repairfaq.org/samnew/lmfaq/lmdwiws.htm
https://www.briggsandstratton.com/na/en_us/support/faqs/browse/engine-problem-solving-tips.html
http://www.jackssmallengines.com/diy/troubleshooting-your-pressure-washer/
http://www.repairclinic.com/RepairHelp/How-To-Fix-A-Pressure-Washer/147---/Pressure-washer-won-t-start
http://farmforum.ca/article/diagnose-small-engine-problems-with-the-%E2%80%98fast%E2%80%99-approach/