Typically most poulan string trimmers are 2 cycle products. Most consumer products are mixed at 40 to 1 mixture, 3.2 oz of 2 cycle oil to 1 gallon of gas. higher end commercial product is a 50 to 1 mixture, 2.6 oz of 2 cycle oil to 1 gallon of gas.
I've only had gas trimmers but all trimmers should be the same, wind the string in the opposite direction the trimmer head spins. If the head spins cloakwise then wrap the string counter-cloakwise.
That a weedwacker, thats the long pole with a little engine on the back , it has string on the bottom and you trim the gas were your lawn mower can't get.
The recommended cord diameter really depends on the type of machine you're using. Electric string trimmers are usually limited to 2.5mm maximum diameter, while gas trimmers can handle 2.75mm or even metal blade attachments.
One of the best weed trimmers available is the Black & Decker CST800 12V 8" Cordless String Trimmer. If yo want a professional grade gas trimer then try Husqvarna 28 cc Full Crank Gas Straight Shaft String Trimmer
Most often gas trimmers are more powerful then their electric counterparts.
Electric trimmers are more convenient as they can be charged at home, but may not last as long as gas trimmers before needing to be recharged.
Black and Decker is one of the best lawn trimmers available with proper care they can last a lifetime.Another good brand too check out would be Toro - Electric Trimmers.
Fuel mixture is 16:1
I PURCHASED MY TRIMMERS AT SEARS. I PAID $100.00 FOR MINE, BUT THEY HAVE TRIMMERS RANGING FROM AROUND $60.00 TO AROUND $300.00. SOME OF THESE RUN BY GAS, OTHERS ARE ELECTRIC. I PREFER THE ELECTRIC ONE. IN TODAYS ECONOMY WE DON'T WANT TO BE DEPENDANT ON GAS ANY MORE THEN WE HAVE TO BE.
Most trimmers roughly 5 oz per gallon gas. The bottles they sell next to the line are to treat 1 gal typically.
I do20/1 and runs good