I have seen more motor problems, all size motors, in the past year than I have ever seen, & I am 60 years old . I would say that 80% of these have been caused by the gas ! Sputtering, hard starting , skipping at high speed, stalling, etc., etc., & the list goes on .
The FIRST thing I do with any motor problem , if it has spark, is start with the fuel. Today's fuel will not " store " as well as old fuel. On ALL my small motors I use 89 octane , an inline fuel filter, some additive like Startron/Stabil [ blue color ] , & never let the fuel set in the tank for more than a month. On 2 strokes, I follow the same procedure above , but also use the correct amount of a quality 2 cycle oil, shut off fuel , & allow engine to run til it dies after every use, unless I will be riding it in the next day or two.
I know that this works 'cause I use my Robin weedeater, that I bought new in 1980, & it has failed to start only 2 times !!!
The FIRST thing I do with any motor problem , if it has spark, is start with the fuel. Today's fuel will not " store " as well as old fuel. On ALL my small motors I use 89 octane , an inline fuel filter, some additive like Startron/Stabil [ blue color ] , & never let the fuel set in the tank for more than a month. On 2 strokes, I follow the same procedure above , but also use the correct amount of a quality 2 cycle oil, shut off fuel , & allow engine to run til it dies after every use, unless I will be riding it in the next day or two.
I know that this works 'cause I use my Robin weedeater, that I bought new in 1980, & it has failed to start only 2 times !!!