Troy built Trimmer....tb575

overhaul the carby
blocked jet or diaphragm problems

if fuel is good and fresh, i would adjust the carb before doing anything else... this will tell you if the exhaust is clogged or a bad carb

1. Replace carb or,
2. Overhaul carb or,
3. Try one of the new "on-engine" carb cleaner-solvent kits which are available at most auto parts stores.

I've never tried one of these kits so I don't know if they actually work, or are just another marketing "pretty face!"

If it is a 2 cycle motor, then use an appropriate 2 cycle oil. I use a synthetic oil that 1 bottle is mixed with 1 gallon of fresh gas.

Your clutch has failed. Most common reason is a broken clutch spring, but sometimes a shoe will break. To get to your clutch, you need to separate the engine from the shaft at the front face of the engine, NOT where the shaft enters the engine housing.

Get someone to thoroughly clean out the carburettor. Sounds loike main jet blocked.

at the end of the trimmer where the cutting head assembly connects to the gear box there are some screws. unscrew and replace with the universal head.

you need to rotate the starter pulley up first to tension the spring.... then feed in your rope tie a not and let it retract the rope into the starter pulley

Hi,
I have the same trimmer and I fixed the problem for good by getting a shakespear line trimmer head to replace the original faulty design,it also has 4 line rather than 2 so it cuts better. It costs about $15.00
see link
http://www.lowes.com/lowes/lkn?action=productDetail&productId=120473-42694-14548&lpage=none&cm_mmc=search_yssp-_-Unassigned-_-060209-_-Shakespeare%20Universal%20Fixed%20Line%20Trimmer%20Head