Hi Blumbly
They are the biggest that i have seen on a push mower.The Quantum XM 50 is a 5 h.p unit.
Something i have found from experience from mine is that at the front there is little linkage that connects to the throttle cable and also the governor spring for the Carby. On the linkage there is a little loop that Governor spring attachs to.This little loop is very susceptible to being hit and bending back stopping the Carby from being fully opened and consequently motor won't reach maximum revolutions.
I have changed the air filter 3 or 4 times.
Changed the engine oil frequently to try and keep it clean and have found this aids in better starting as well.Still on the original spark plug.
Cheers
Vic 18
