My mate gave me a mower he pickup on the curb....... he couldn't get it started.... I sharpened blades, cleaned air filter, carb bowl and park plug.......... Looks pretty new, don't think blade has been sharpened..... Anyway the big problem was the spark plug boot was not fully home on the spark plug......
Plenty of power and I always drill a hole in flap so I hold it up with a piece of wire...... 139cc , and it has no throttle but it's OK. lucky speedy
........................Keep your blades sharp......................