I need carbon brush for yardwork 054-5703-0 electric chain saw

Go to the mfg website or go to a small appliance repair shop and look there.

FIX Remington Electric Pole Saw 8 Amp Motor Carbon Brush Set 2 143

Remington Pole Saw Carbon Brushes
If you're Remington Pole Saw is slowing down, throwing sparks, overheating or not starting you may need to replace the carbon brushes. Replacing brushes and cleaning commutator early can prevent damage to motor armature!
Remington carbon brushes on E-bay Search for:
Remington Pole Saw 8 AMP Carbon Brush

Remington Pole Saw Carbon Brushes
If you're Remington Pole Saw is slowing down, throwing sparks, or not starting you may need to replace the carbon brushes. Replacing brushes and cleaning commutator early can prevent damage to motor armature!
Remington carbon brushes on E-bay Search for:
Remington Pole Saw 8 AMP Carbon Brush

You can get carbon brushes from any electric motor - have a look around scrap dealers for vacuum cleaners, washing machines, alternators from cars etc - you may find an appropriate brush from there.

You can also try eBay
or the manufacturer's website

if you still have problems come back and add information such as the make and model of the chain saw AND the exact parts you require - I can help you more then.

Parts for Remington saws are few and far between. Brushes are a common failure point and those available have about been bought up. You best chance is to check with a well-stocked hardware store or an electric tool repair shop for a similar brush from a different tool. You may have to modify something similar to fit. Good luck!

You need an AC voltmeter to trace the problem with the switch. It can also be a bad motor brush/spring--these saws are great for killing motor brushes, and there are virtually no replacements available as Remington has ceased saw operations. If it is a bad brush, visit an electrical tool shop to see if they have something that will work from a different brand of tool. Good luck!

Remington Saws have ceased operations and, unless you like to make your own replacement parts, they are prone to failure. The gearbox is sealed and the motor brushes are not available anywhere. Look elsewhere!

try these:

http://www.tanaka-usa.com/
http://www.powerequipmentandparts.com/
http://www.mowtownusa.com/
http://www.m-and-d.com/chainsaw_parts.html?id=wiw2HnBq
http://www.turfparts.com/replacement_parts_chain_saw_cut_off_saw_parts_aa_index.htm