Yet another example of the chinese junk Victa unloads to unwitting consumers.
I have no idea what supplier they used for these but how they managed to make a $220 trimmer worse that the pope and sanli ones you got for $99 is beyond me. its the same base engine.
The fuel cap is a massively common issue - replacement about $20 and it will last 5 years.
Have seen the results of a couple now where the flywheel physically exploded - taking out the starter, wiring, coil, starter cup (and presumably the operator needing a new pair of pants)
carby is standard knockoff walbro, plastics pretty nasty, pull starters weak
check for spark - the plug boots are crap and will partially short and conduct spark to the cylinder head (or your hand if you touch it - ask me how i know)