you run 100-1 oil mix !! wow... lean AF .. I'm surprised you haven't you haven't made a pool of molten steel.. I'm also very impressed
Ive tried my best, "make a pool of molten steel"
My 7 year old HRU216M2 , I new it was extra fast through the 3 months of spring I was running behind it in 3rd gear, i was extra busy so left it cutting alot of grass quickly and saved days mowing,
Checked the rpm after christmas the screw came out for thottle stopper it was running at 4000rpm for 3 months it survived so ive back the revs back to 3700 for a 9 month rest.
I also run the 100-1 Opti-2 through my 4 stoke gear aswell. Without the oil in the fuel it would have worn out years ago, its worked hard, haven't done a thing to the motor.
The big players stihl etc wont go to 100-1 even if its better, because there is to much money in oil, why would anyone want to half there sales in oil if they didnt have to. thats the bread and butter for the dealers.