Yes
4 cycle means that you do not mix oil with the gas. They will have a place for the oil and a place for the gas seperate. Although, not many weedwackers have 4 cycle engines... 2 cycle engines are the ones that you need to mix oil with the gas.
none 2 cycle engines run a gas/oil mix for lubrication
Yes as long as you mix the oil with it.
4 cycle engines mix gasoline with air to operate efficiently.
Being that it has crank case oil it would be a 4 Cycle. Engines that you mix oil and gas are 2 cycle.
50to1
It's an oil meant for 2-stroke engines. It'll mix well with gas, and also combust well.
No it is 4 cycle oil, 2 cycles is the only oil you mix with gas for 2 cycle engines. They may be referring to a syn/ conventional oil mix that they have preformed to improve their oil. It will work fine in your 4 cycle engine as long as it is the correct weight for your engine. As long as it is like 10w30 you should be good to go.
Mariner 3.3 needs 50:1 mix.
Try this site - http://www.marineengine.com/mfr/mariner_outboard.html
No , you obviously don't understand 2 stroke engines
Every 2 cycle engine is different, but there is a solution to your problem: I recently went to Lowe's and found a 2 cycle engine oil that you mix with gas that takes care of ALL mix ratios. Just follow the directions on the bottle (it says something like "put this entire container in 1 gallon of gasoline"). With this product you can use the same mixture in all 2 cycle engines!