Weed trimmer wont start, spark plug has spark starting fluid down the cylinder head and re installed plug still doesnt sputter at all. also sprayed starting fluid into carb. no sputter. again it does have spark and did try another plug. compression test was at 60. what could the problem be? timing?

Try reversing fuel lines at the carburetor.

If you didn't over winter the engine properly it could be several things. Start with replacing the fuel filter. If it still won't start... time to put in a carburator kit. Next time make sure you run your weed eater dry and spray some wd-40 or the like into the spark plug hole.

Try removing the fuel, remove the spark plug and give a few pulls to remove starter fluid from the cylinder, once completed attach your spark plug and check spark, reinstall plug, add fresf fuel to the tank and try staring with normal cold start procedure. Does it have good compression?

As a diagnostic see if it runs on starter fluid. Drain all the fuel so no chance it floods. Then remove air filter. Open throttle and spray a short burst of fluid down carb throat. Release throttle and promptly start. It should run for a couple of seconds and stop.

If it doesnt run on staryer fluid make sure the plug and cylinder is dry (not flooded). If its not flooded and wont run on starter fluid then either poor spark, timing, or poor compression (crankcase leak).

Try cleaning the spark plug, make sure it sparks. Put some fresh gasoline in the tank, check start stop switch.
A easy way to check whether the problem is related to carb or not is:
remove the spark plug put some fresh gasoline in the cylinder, put the spark plug back
pull the starter a few times if it starts for a few seconds it means is related to carb.
Be carefully when handling gasoline.

take the spark plug out and pull the engine over with the spark plug in the wire and ground the plug to the trimmer and see if it sparks. if not flip the switch the other way and see if it sparks then you shall know.

Could be a faulty kill switch not allowing it to start, sounds like you covered all the things I would check.

Pull flywheel check for sheared crankshaft/flywheel alignment pin.

Check the on-off switch? Try disconnecting the switch and see if it starts. If it does, replace the switch.

It cranks really good sputters a little and makes some loud pops but it will not turn over? FYI:Cranking and turning over are the same thing. When was the last time it ran. The gas could be bad. Did you get new plug wires as well. Try testing the distributor, remove a spark plug, plug it back into the wire, and touch the threads to ground and crank the engine. It should spark. Keep your fingers away, that's high voltage. Remove all spark plugs, spray some starting fluid in each cylinder, then crank the engine with the plugs out. This will clean any debris from the cylinders. Engines need backpressure to run properly, a major exhaust leak hence the popping, could cause it to not run. If you can get it started try to keep it going, full throttle, keep in the starting fluid, it could just need to get warm. I used to have one of them and they don't like it when they're cold.