i think you worry too much mate ,if its not broke dont fix it?.,its running ok now isnt it?ok so just leave it alone and enjoy .im no expert but maybe the fuel is the problem because the 5%fuel might be too lean if the engine is new!!.oh did you manage to get round to reading the instructions yet mate?
The engine has like 3-4 gallons of 5% through it...thats why I was wondering if it was safe to use 10%.
Sounds like that you have a solution there...... sometimes the most complex problems have the simplest fix............ enjoy ........... cptn crash
Thanks.