"gardenlen" wrote in message
...
g'day bob,

just can't figure this one it matters not to the blades what engine is
turning them, i mowed lawns for years our 4 strokes cut neat they had
to, for rough cutting 2 blades is better for fine neat work 4 blades
is the go.

More to do with the characteristics of the motors themselves. You see, the 4
strokes are lower revving, therefore they have more of a tendency to chew
the lawn when the going gets tough. The 2 strokes have copious amounts of
tourque and rev comparatively higher, therefore giving a cleaner cut. Maybe
they have improved since I last used one about 10 years ago.

Mind you, all this is just my opinion.