Homelite I need a part number for a bc 800 homelite string weed eater and i dont have an owners manual

e replacement parts dot com

This could be a number of things. Clogged air filter/fuel filter/carburetor/fuel tank lid breather hole, cracked fuel line or primer bulb, or clogged spark arrestor in muffler. Here's some links that will help to change the bulb, fuel cap, fuel lines, rebuild carb, replace spark arrestor, and troubleshoot.
Homelite Tune Up

Homelite weed eater gas trimmer will not run how to rebuild weedeater...

http://www.repairclinic.com/RepairHelp/String-Trimmer-Repair-Help

Most gas weed eaters use 2-cycle engines. For the Homelite 2-cycle engine trimmers, use a 50:1 ratio of gasoline to the Homelite lubricant. (For 1 gallon of gas, add 2.6 oz of the oil.)

Many Homelite tool manuals are available here: http://www.homelite.com/service_support/product_owners_manuals . Scroll down to find your string trimmer.

I hope this helps.

Cindy Wells

See Figures 10 thru 14 in your online user's manual here:
http://lawnandgarden.manualsonline.com/mdownloads/7d2e081d-9dc3-4ad6-b637-f6f946e2283e.pdf

Without knowing your model number, the typical string for the Homelite trimmers is .080" string.These types of units use that:
http://dl.owneriq.net/7/7d91348b-6b05-4cce-ad47-08aad2e1f2dd.pdf

Go to homelite.com, ordering parts, locating parts, select Homelite, select string trimmer, then find your ut number which will be your model no.

You don't have to purchase a new one. Parts for it are available. This online parts house is good. If you are saying you need the plastic bubble for the carburetor, it is here.
http://www.ereplacementparts.com/homelite-misc-parts-c-18807_24213.html
There are 3 models listed. They are listed in the 4th section of misc. parts and are items 9,10, and 11.
All the other parts for your machine are listed here too:
http://www.ereplacementparts.com/homelite-ut21506-mightylight-string-trimmer-parts-c-18807_20299_64844.html

A user manual can best describe and show diagrams of how this is done. Go here. You will need Adobe Reader to view this.
http://dl.owneriq.net/7/7d91348b-6b05-4cce-ad47-08aad2e1f2dd.pdf
The information you want is on pages 13-14. I picked out these general models for Homelite because you haven't listed one.